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  • Behavior
  • Circulatory System
  • Clinical Pathology and Procedures
  • Digestive System
  • Emergency Medicine and Critical Care
  • Endocrine System
  • Exotic and Laboratory Animals
  • Eye and Ear
  • Generalized Conditions
  • Immune System
  • Integumentary System
  • Management and Nutrition
  • Metabolic Disorders
  • Musculoskeletal System
  • Nervous System
  • Pharmacology
  • Poultry
  • Reproductive System
  • Respiratory System
  • Toxicology
  • Urinary System
  • Zoonoses
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    Photographs
    By NameBy Section

      • "Neck" lesions (teeth), cat
      • "Screaming fit," mink
      • 41-day-old conceptus removed from site of implantation, mare
      • 41-day pregnancy in right uterine horn, horse
      • Abdominal hernia, foal
      • Abdominal mass, kingsnake
      • Abnormal beak growth, Galapagos tortoise
      • Abomasal impaction
      • Abomasal lesions, Ostertagia
      • Abomasal ulcer
      • Aborted equine twins
      • Acanthocheilonema microfilariae
      • Acanthomatous ameloblastoma, dog
      • Acanthomatous ameloblastoma, radiograph, dog
      • Acer rubrum (Red maple), young plant
      • Actinobacillosis, cow
      • Actinobacillus equuli
      • Actinobacillus lignieresii
      • Actinobacillus pleuropneumoniae infection, pig lung
      • Actinomyces bovis, Gram-stained smear
      • Acute bronchointerstitial pneumonia
      • Acute chlamydiosis
      • Acute glaucoma, dog
      • Acute multiglandular mastitis
      • Acute swine erysipelas
      • Acute swine erysipelas, skin form
      • Adduction of the limb
      • Adult female ostrich
      • Adult male ostrich
      • Advanced horizontal groove or fissure
      • Advanced keratoconjunctivitis sicca
      • Aesculus spp (Buckeye)
      • Aesculus spp (Buckeye), plant with fruit
      • Aflatoxicosis, fatty liver, chicken
      • African ball python
      • African horse sickness, swelling of supraorbital fossa
      • African swine fever, hyperemia, ears
      • Agave spp (Lecheguilla)
      • Agave spp (Lecheguilla), close-up
      • Agrostemma githago (Corn cockle)
      • Agrostemma githago (Corn cockle), close-up
      • Aleutian disease, mink
      • Allergic bronchiolitis, radiograph
      • Allium spp (Cultivated onion)
      • Allium spp (Wild onion)
      • Alopecia due to adrenal gland hyperplasia, ferret
      • Alpaca, huacaya type
      • Alpaca, suri type
      • Amanita phalloides
      • Ambylomma haebreum
      • A mild case of vaginal prolapse
      • Amyloidosis, finch
      • Amyloodinium
      • Anaplasma marginale, bovine blood smear
      • Anaplasma phagocytophilum
      • Anaplocephala and ileal impaction
      • Anatomy for lateral crus nerve block, horse
      • Anatomy for medial crus nerve block, horse
      • Anatomy for nerve block, digital area, forelimb, horse
      • Anatomy for nerve block in lateral arm and forearm, horse
      • Anatomy for nerve block in medial arm and forearm, horse
      • Anatomy for nerve block of distal forelimb, horse
      • Anatomy for tarsus nerve block, horse
      • Ancylostoma caninum, eggs
      • Angular limb deformity, foal
      • Anisakis spp, ova
      • Anoplocephala magna
      • Anoplocephala magna, eggs
      • Anterior lens luxation, dog
      • Anterior luxation, cataractous lens
      • Anterior luxation, dog
      • Anterior uveitis, cat
      • Anterior uveitis, E canis infection
      • Anterior uveitis, FIP
      • Anterior uveitis after trauma
      • Apical osteitis, radiograph, horse
      • Apocynum cannabinum (Hemp dogbane)
      • Apocynum spp, fruit (pods)
      • Argulus spp, tail fin, goldfish
      • Arizona mountain kingsnake
      • Arthrogryposis, calf
      • Arthroscopy joint entry site, elbow, cattle
      • Arthroscopy joint entry site, elbow, horse
      • Arthroscopy joint entry site, hip, cattle
      • Arthroscopy joint entry site, hip, horse
      • Arthroscopy joint entry site, shoulder, cattle
      • Arthroscopy joint entry site, shoulder, horse
      • Arthroscopy joint entry site, stifle, cattle
      • Arthroscopy joint entry site, tarsocrural joint, cattle
      • Arthroscopy joint entry sites, carpus, cattle
      • Arthroscopy joint entry sites, carpus, horse
      • Arthroscopy joint entry sites, digit, cattle
      • Arthroscopy joint entry sites, digit, horse
      • Arthroscopy joint entry sites, hock, horse
      • Arthroscopy joint entry sites, stifle, horse
      • Articular gout, cockatiel hen
      • Ascaridia galli, eggs
      • Ascaridia galli, small intestines, chicken
      • Ascarid larval migration scars, pig
      • Ascaris suum, adults
      • Ascaris suum, egg
      • Ascaris suum adult
      • Ascarops strongylina, adults
      • Ascarops strongylina, egg
      • Ascites, chicken
      • Asclepias labriformias (Labriform milkweed)
      • Asclepias subverticulatus (Whorled milkweed)
      • Aseptic necrosis of femoral head
      • ASF, hemadsorption of red blood cells
      • Aspergillus fumigatus
      • Aspergillus granulomas, lungs, chicken
      • Aspergillus spp in guttural pouch mycosis
      • Aspicularis tetraptera (pinworms)
      • Astragalus spp (Red stemmed peavine)
      • Astragalus spp (Timber milkvetch)
      • Astragalus spp (Two groove milkvetch)
      • Atresia, distal nasolacrimal duct
      • Atresia coli
      • Atresia coli, calf
      • Atrial septal defect, pig
      • Atrophic rhinitis, pig
      • Aural abscess, box turtle
      • Aural plaques, horse
      • Avian influenza, hemorrhagic skin, chicken
      • Babesia bigemina, bovine blood smear
      • Babesia bovis liver smear
      • Baccharis spp (Silverling, Baccharis, Yerba-de-pasmo)
      • Baccharis spp (Silverling, Baccharis, Yerba-de-pasmo), young plant
      • Bacillus anthracis, ground glass colonies
      • Bacillus anthracis, medusa head morphology
      • Bacillus anthracis, methylene blue stain
      • Basal cell carcinoma in a cat
      • Base of cecum, horse
      • B avium and B hinzii colony morphology
      • Beak abnormality, turtle
      • Beak after trimming
      • Bilateral retinal detachment
      • Bilateral ringbone
      • Blackleg, cow
      • Blepharitis, dog
      • Blood film from a cria with ‘Candidatus Mycoplasma haemolamae' infection
      • Blood film from a dog with Mycoplasma haemocanis infection
      • Blood smear, llama
      • Blue tongue skink
      • Bog spavin
      • Bone spavin
      • Boophilus spp, female and eggs
      • Bordetella avium, flattened trachea, turkey
      • Bordetella avium, rough colony
      • Bordetella avium, smooth colony
      • Bordetella avium, trachea, 3 day postinfection
      • Bordetella avium, trachea, 7 day postinfection
      • Bordetella hemagglutination
      • Bot eggs of Gasterophilus
      • Botulism poisoning, generalized paresis, chicken
      • Bovine blood smear, anisocytosis
      • Bovine blood smear, platelets
      • Bovine blood smear, white blood cells
      • Bovine claw
      • Bovine hereditary zinc deficiency
      • Bovine leukosis, abomasal ulcer
      • Bovine leukosis, cardiac lesions
      • Bovine leukosis, enlarged lymph nodes
      • Bovine leukosis, skin lesions
      • Bovine sarcoptic mange
      • Bovine stomatitis
      • Bovine ulcerative lymphangitis
      • Bovine vascular corium
      • Box turtle, female
      • Box turtle, male
      • Brachygnathia, dog
      • Brachygnathia, horse
      • Brachygnathia, puppy
      • Brachyspira (Treponema) hyodysenteriae
      • Bracken fern (Pteridium aquilinum) frond
      • Bronchopneumonia, radiograph
      • Bucked shins
      • Bullous pemphigoid, dog
      • Bunostomum phlebotomum
      • Bunostomum phlebotomum, eggs
      • Bunostomum trigonocephalum, eggs
      • Caladium spp (Caladium)
      • Campylobacter fetus fetus
      • Campylobacter jejuni, gram-stained smear of intestine
      • Campylobacter jejuni colitis, gross lesions, dog
      • Candidiasis, dolphin
      • Canine blood smear, acute blood loss
      • Canine blood smear, autoimmune hemolytic anemia
      • Canine blood smear, basophilic stippling, lead toxicity
      • Canine blood smear, eosinophil
      • Canine blood smear, markedly regenerative anemia
      • Canine blood smear, regenerative anemia
      • Canine blood smear, white blood cells
      • Canine semen, microcephalic sperm
      • Canine teeth, potbellied pig
      • Cannabis sativa (Marijuana)
      • Cannabis sativa (Marijuana), close-up
      • Cantharidin, hemorrhagic cystitis
      • Cantharidin, hemorrhagic gastritis
      • Capillaria aerophila, egg
      • Capillaria contorta, crop, quail
      • Capillaria egg
      • Capillaria eggs in gravid worm
      • Capillaria found in angelfish intestine
      • Capillaria plica, egg
      • Capital physeal fracture
      • Caprine blood smear, poikilocytosis
      • Caprine intersex syndrome
      • Carpal valgus, foal
      • Caseous lymphadenitis, goat
      • Caseous lymphadenitis, head, goat
      • Caseous lymphadenitis kidney lesion, goat
      • Cassia obtusifolia (Coffeepod, Sicklepod)
      • Cassia obtusifolia (Coffeepod, Sicklepod), seeds
      • Cassia occidentalis (Coffee senna, Coffee weed, Styptic weed, Wild coffee)
      • Cassia occidentalis (Coffee senna, Coffee weed, Styptic weed, Wild coffee), seeds
      • Cataract, American Cocker Spaniel
      • Cataract, Bichon Frise
      • Cataract, Golden Retriever
      • Cataract, rat
      • Cataract, Siberian Husky
      • Cataracts, guinea pig
      • Cattle biting louse, Damalinia (Bovicola) bovis, skin
      • Caudal vena cava thrombosis
      • Centaurea repens (Russian knapweed)
      • Centaurea solstitialis (Yellow star thistle, Yellow knapweed)
      • Cervical spondylomyelopathy (wobbler syndrome), Doberman
      • Cestrum diurnum, (Day-blooming jessamine)
      • Chabertia ovina
      • Chabertia ovina, eggs
      • Cheilitis and lip fold dermatitis, dog
      • Chemosis, cat
      • Cherry eye, dog
      • Cheyletiella blakei
      • Cheyletiellosis (walking dandruff), rabbit
      • Chip fracture, intermediate carpal bone
      • Chlamydial keratoconjunctivitis, cytology, cat
      • Chlamydia psittaci, elementary bodies
      • Chlamydia psittaci, fluorescent antibodies
      • Chlorophytum spp (Liliaceae) Spider plant, St. Bernard's lily, Airplane plant
      • Cholecalciferol, histopathologic calcification
      • Cholecalciferol, serosal calcification
      • Chorioptes bovis, female
      • Chorioptes bovis, male
      • Chorioptic mange, cow
      • Chorioptic mange, horse
      • Chorioretinitis, active, dog
      • Chorioretinitis, inactive, dog
      • Chromodacryorrhea ("red tears"), rat
      • Chronic exudative epidermitis
      • Chronic glaucoma, dog
      • Chronic intersitial nephritis, pig
      • Chronic obstructive pulmonary disease with "heave line"
      • Chronic ulcerative stomatitis
      • Cicuta douglasii (Water hemlock)
      • Cicuta douglasii (Water hemlock), close-up
      • Cicuta douglasii (Water hemlock), tuber
      • Ciliary body adenocarcinoma, dog
      • Cleft palate, horse
      • Cleft palate, horse, preparation of mucoperiosteal flaps
      • Cleft palate, horse, suture closure
      • Clinical signs consistent with channel catfish virus disease
      • Clitocybe spp
      • Cloacal papilloma, gross lesion, Amazon
      • Clostridium difficile, gross lesions, hamster
      • Clostridium perfringens, Gram-stained smear
      • Clostridium perfringens, subacute enteritis, pig
      • Clostridium perfringens enteritis, Gram stain
      • Clostridium piliforme, liver section
      • Clostridium piliforme, silver stain, liver
      • Clostridium spp, Gram's stain
      • Clostridium spp necrotic enteritis, chicken
      • Club foot
      • Coccidiodes immitis, mature spherules
      • Coccidioidomycosis, Poodle
      • Coccidiosis (proposed site parasitized by Eimeria hagani), poultry
      • Coccidiosis (proposed site parasitized by Eimeria mivata), poultry
      • Coccidiosis (site parasitized by Eimeria acervulina), poultry
      • Coccidiosis (site parasitized by Eimeria brunetti), poultry
      • Coccidiosis (site parasitized by Eimeria maxima), poultry
      • Coccidiosis (site parasitized by Eimeria mitis), poultry
      • Coccidiosis (site parasitized by Eimeria necatrix), poultry
      • Coccidiosis (site parasitized by Eimeria praecox), poultry
      • Coccidiosis (site parasitized by Eimeria tenella), poultry
      • Cochliomyia hominivorax (screwworm) adult fly
      • Colchicum autumnale (Autumn crocus)
      • Collagenous nevus, dog
      • Collie eye anomaly
      • Color dilution alopecia, Doberman
      • Congenital bipartite navicular bones, horse
      • Congenital cataract, Miniature Schnauzer
      • Conium maculatum (Poison hemlock)
      • Conium maculatum (Poison hemlock), leaves and flowers
      • Conjunctival habronemiasis
      • Conjunctivitis, cat
      • Contagious ecthyma, goat
      • Contracaecum spp, ova
      • Contracted flexor tendons, calf
      • Contracted tendons, foal
      • Convallaria majalis (Lily-of-the-valley)
      • Convallaria majalis (Lily-of-the-valley), flowering plant
      • Cooperia punctata
      • Cooperia spp, eggs
      • Corkscrew claw
      • Corneal degeneration, dog
      • Corneal dystrophy, dog
      • Corneal edema, dolphin
      • Corneal foreign body
      • Corneal laceration, horse
      • Corneal laceration with iris prolapse
      • Corneal laceration with retinal detachment
      • Corneal sequestration and keratitis, cat
      • Corneal stromal abscess
      • Corneal ulcer, sea lion
      • Corneal ulceration, dog
      • Corneal ulceration, horse
      • Coronary band vesicles, pig
      • Cowpox lesions, cat
      • Cowpox ulcer
      • Cowpox virus, chorioallantoic membrane
      • Cow with actinomycosis
      • Cranial nerves for nerve block, cow
      • Cranial nerves for nerve block, horse
      • Cross-legged posture, cattle
      • Crotalaria spp (Crotalaria, Rattlebox, Rattleweed)
      • Crotalaria spp (rattle weed)
      • Cryptococcosis, cat
      • Cryptococcus neoformans, Gram's stain
      • Cryptococcus neoformans, tissue smear
      • Cryptorchidism
      • Cryptosporidia oocysts, Savannah monitor
      • Cryptosporidium, tracheal mucosa, turkey
      • Ctenocephalides felis, female
      • Ctenocephalides felis, male
      • Ctenocephalides felis, the common cat flea
      • Ctenocephalides spp, larvae
      • Culicoides sensitivity, horse
      • Cushing's disease, hirsutism
      • Cutaneous asthenia, cat
      • Cutaneous habronemiasis, horse
      • Cutaneous hemangiosarcoma
      • Cutaneous lesions typical of Treponema cuniculi infection, rabbit
      • Cutaneous lymphosarcoma
      • Cutaneous pox lesions, canary
      • Cutaneous stephanofilariasis
      • Cutaneous ulnar vein, adult ostrich
      • Cutaneous ulnar vein, ostrich chick
      • Cuterebra larva
      • Cutting needle teeth, potbellied pig
      • Cyanobacteria waterbloom
      • Cyathostome larvae, colon
      • Cyclamen spp (Primulaceae) Cyclamen, Snowbread, Shooting star
      • Cynoglossum officinale (Hound's tongue)
      • Cystic calculi, bladder, rabbit
      • Cystic ovarian disease, cow
      • Cystic prostate (ultrasound)
      • Cytauxzoon felis, feline blood smear
      • Dacryocystitis, dog
      • Dacryocystitis, horse
      • Dactylogyrus on gills, discus
      • Damalinia bovis, female
      • Damalinia bovis, male
      • Damalinia equi nits
      • Datura stramonium
      • Datura stramonium (Jimson weed, Thorn apple), fruiting body
      • Datura stramonium (Jimson weed, Thorn apple), young plant
      • Daubentonia (Sesbania) punicea (Rattlebox, Purple sesbane)
      • Deciduous dentition, dog
      • Deep pectoral myopathy
      • Deep stromal corneal ulcer
      • Degenerative joint disease, radiograph
      • Delphinium nelsonii (Low larkspur)
      • Delphinium occidentale (Tall larkspur)
      • Demodex, gross lesions, hamster
      • Demodex bovis, skin lesions
      • Demodex canis
      • Dental malocclusion, incisors, rabbit
      • Dentigerous cysts, horse
      • Dentition, cat
      • Dentition, dog
      • Dentition, horse
      • Dentition, incisors and canines, dog
      • Dentition, large ruminants
      • Dentition, mandible, cat
      • Dentition, maxilla, cat
      • Dentition, pig
      • Dentition, premolars, dog
      • Dentition, small ruminants
      • Dermacentor albipictus
      • Dermacentor reticularis
      • Dermanyssus gallinae
      • Dermanyssus gallinae, skin lesions
      • Dermatobia, scars on leather
      • Dermatobia hominis, larvae
      • Dermatobia hominis, skin lesions
      • Dermatomyositis, muscle
      • Dermatomyositis, skin
      • Dermatophilosis, horse
      • Dermatophilus congolense infection, cow
      • Dermatophilus congolense infection, horse
      • Dermatophytosis, cow
      • Dermatophytosis, dog
      • Dermoid cyst, dog
      • Destruction of ductal epithelial cells, parotid salivary gland, rat
      • Diaphragmatic hernia
      • Dichelobacter nodosus, footrot lesion, sheep
      • Dicrocoelium dendriticum
      • Dicrocoelium dendriticum, egg
      • Dictyocaulus spp, equine lung
      • Dictyocaulus viviparus
      • Dieffenbachia spp (Dumbcane)
      • Dieffenbachia spp (Dumbcane), close-up
      • Diestrus intermediate and parabasal cells
      • Difficul shedding (dysecdesis), snake
      • Diffuse iridal melanoma
      • Diffuse iridal melanoma, cat
      • Digital dermatitis or hairy wart
      • Digitalis purpurea (Foxglove)
      • Digitalis purpurea (Foxglove), flower
      • Dipylidium caninum, egg packets
      • Dipylidium caninum, small intestine
      • Dipylidium egg packet
      • Dirofilaria immitis, canine heart
      • Dirofilaria immitis microfilaria, canine blood smear
      • Displacement of deep digital flexor tendon, rupture of superficial digital flexor tendon
      • Displacement of superficial digital flexor tendon, horse
      • Dissecting aneurysm (aortic rupture), turkey
      • Distemper in ferrets
      • Distended infraorbital sinus, parakeet
      • Distichiasis, dog
      • Dog-biting louse, Trichodectes canis
      • Dog sucking louse, Linognathus setosus, female
      • Dog sucking louse, Linognathus setosus, male
      • Dog with cutaneous signs of leishmaniosis
      • Döhle bodies, equine blood smear
      • Dorsal displacement of the soft palate
      • Double sole, heifer
      • Dracaena spp (Dragon tree)
      • Dracaena spp (Dragon tree), alternate variety
      • Dracaena spp (Dragon tree), varigated
      • Draschia megastoma, equine stomach
      • Duck hepatitis A virus type 1, week-old duckling
      • Duck viral enteritis
      • Duck virus hepatitis, older duckling
      • Early distemper, ferret
      • Early keratoconjunctivitis sicca
      • Ecchymosis, abdomen
      • Ecchymosis, mucous membranes, mouth
      • Echinococcus granulosus, proglottid
      • Echinococcus granulosus tapeworm
      • Ectopic ureter, cat
      • Ectropion, dog
      • Eimeria acervulina, developmental stages
      • Eimeria acervulina, gross lesions, chicken
      • Eimeria brunetti, gross lesions, chicken
      • Eimeria brunetti, oocysts
      • Eimeria maxima, oocysts
      • Eimeria necatrix, developmental stages
      • Eimeria necatrix, gross lesions, chicken
      • Eimeria tenella, gross lesions, broiler chicken
      • Eimeria zuernii oocysts
      • Ejaculatory ducts, ostrich
      • Elaeophora schneideri, sheep
      • Elementary bodies, Chlamydia psittaci infection
      • Elliptical erythrocytes, blood smear, llama
      • Embiotoca spp, tail, pile perch
      • Embolic pneumonia, cow
      • Embryonated ova characteristic of both Rhabdias and Strongyloides, Timor python
      • Empyema of guttural pouch, radiograph
      • Enamel dysplasia, dog
      • Enamel hypoplasia, dog
      • Encapsulated islet cell adenoma, pancreas, ferret
      • Encephalitis, head turn, calf
      • Enlarged thyroid, foal
      • Entamoeba histolytica cyst
      • Enterotoxigenic Escherichia coli
      • Enterotoxigenic Escherichia coli, intestine, calf
      • Entropion, after treatment
      • Entropion, before treatment
      • Entropion, rabbit
      • Entropion in a foal before (above) and after (below) treatment
      • Enzootic pneumonia, Mycoplasma hyopneumoniae, pig
      • Epicauta pardalis blister beetle
      • Epicauta pennsylvanica (black blister beetle)
      • Epicauta temexia (striped blister beetle)
      • Epiphysitis
      • Epitheliogenesis imperfecta, foal
      • Equine blood smear, neutrophils
      • Equine blood smear, platelets
      • Equine blood smear, rouleau formation
      • Equine blood smear, white blood cells
      • Equine coital exanthema lesions, mare
      • Equine gastrointestinal anatomy
      • Equine infectious anemia, mucous membranes
      • Equine lordosis
      • Equine lordosis, radiograph
      • Equine nasal passages
      • Equine papillomas
      • Equine sarcoid
      • Equine septic arthritis
      • Equine viral arteritis, lacrimation
      • Equine viral arteritis, ocular edema
      • Equine viral arteritis, scrotal edema
      • Equine viral arteritis, skin reaction
      • Ergasilus, gills, largemouth bass
      • Erosion typical of columnaris disease, silver dollar
      • Erysipelas, dolphin
      • Erysipelothrix rhusiopathiae, Gram's stain
      • Erysipelothrix rhusiopathiae, spleen, turkey
      • Esophageal obstruction
      • Esophageal obstruction sites
      • Esophagogram, dilatation of the esophagus
      • Estrus-induced aplastic anemia, ferret
      • Estrus vaginal cytology
      • Ethmoid hematoma
      • Ethmoid hematoma, right ethmoidal region
      • Eupatorium rugosum (White snakeroot)
      • Euphorbia pulcherrima (Poinsettia)
      • Euphorbia pulcherrima (Poinsettia), flowering plant
      • Eurytrema pancreaticum, adult
      • Eurytrema pancreaticum, eggs
      • Eurytrema pancreaticum, gross lesions
      • Excess adipose tissue on the neck, leading to a cresty appearance
      • Exercise-induced pulmonary hemorrhage
      • Exophthalmos, rabbit
      • Exudative epidermitis, "greasy" lesion, pig
      • Face fly Musca autumnalis
      • Facial nerve trauma
      • Familial dermatomyositis, Collie
      • Fasciola hepatica, adult
      • Fasciola hepatica, egg
      • Fasciola hepatica, gross lesions, cow
      • Fatty liver syndrome, gross lesions, cockatiel
      • Feather cyst, macaw
      • Feather picking, cockatoo
      • Feline blood smear, Heinz bodies, new methylene blue
      • Feline blood smear, Heinz bodies, Wright-Giemsa
      • Feline blood smear, nonregenerative anemia
      • Feline blood smear, platelets
      • Feline blood smear, rouleau formation
      • Feline blood smear, white blood cells
      • Feline heartworm disease, radiograph
      • Feline hypertrophic cardiomyopathy
      • Feline lymphosarcoma-leukemia complex
      • Feline lymphosarcoma-leukemia complex, masses
      • Feline mammary hyperplasia
      • Feline pyometra (ultrasound)
      • Female reproductive tract, ostrich
      • Festuca arundinacea (Tall fescue)
      • Fibrosarcoma, beak, parakeet
      • Fibrosarcoma, cat
      • Fibrosarcoma, parakeet
      • Fissured tongue, dog
      • Fistulous withers
      • Flea allergy dermatitis with scaling and erythema in a dog
      • Fluid-filled sternal bursa, keel, turkey
      • Fluorescent antibodies, Chlamydia psittaci infection
      • Follicular cyst, dog
      • Follicular gastritis, ferret
      • Foot-and-mouth disease, vesicles, pig
      • Footrot, open
      • Foreign bodies, cetacean stomach
      • Foreign body in esophagus, dog
      • Foreign body in sole
      • Foreign body in white line
      • Foreign body removed from stomach, potbellied pig
      • Foreign body site, sole
      • Fowl cholera, consolidated lung, turkey
      • Fowl cholera, swollen wattles, broiler
      • Fracture, elbow, horse
      • Fracture, fourth metatarsal
      • Fracture, left distal humeral condyle, potbellied pig
      • Fracture, proximal sesamoid bones
      • Fracture, third metacarpal
      • Freemartin condition
      • Galerina autumnalis
      • Gangrenous dermatitis
      • Gangrenous dermatitis, necrotic skin
      • Gangrenous dermatitis, serous exudate, chicken
      • Gas bubble disease, koi
      • Gasterophilus spp
      • Gasterophilus spp, equine stomach
      • Gastric foreign body, U.S. penny
      • Gastric mucosal hypertrophy, Indigo snake
      • Gastric torsion, dog
      • Gastric ulcers, foal
      • Gelsemium sempervirens (Yellow jessamine, Evening trumpet flower, Carolina jessamine), flowering vine
      • Giardia psittaci, Gram's stain, parakeet small intestine
      • Giardia spp cysts
      • Giardia spp cysts, ratsnake
      • Gingivitis, cat
      • Gingivitis, dog
      • Glossitis, dog
      • Glossitis with severe edema, cat
      • Gossypium spp (cotton plant)
      • Gossypium spp (cotton plant), flowering
      • Gossypium spp (cotton plant), seeds
      • Granuloma associated with systemic Mycobacterium infection, gill tissue
      • Granulomas suggestive of Cryptobia infection, African cichlid
      • Granulomatous lesions typical of Mycobacterium, goldfish
      • Granulosa cell tumor, mare
      • Gross lesions in the liver of a chicken with lymphoid leukosis
      • Grubby hide, Hypoderma bovis
      • Guanacos in Chile
      • Guinea pig debilitated from severe mite infestation with Trixacarus caviae
      • Gutteral pouch empyema
      • Gutteral pouch mycosis
      • Guttural pouch mycosis, horse
      • Gutturomycosis, horse
      • Habronema spp
      • Habronema spp, eyelid, horse
      • Habronemiasis, stallion
      • Haematobia irritans (adult horn fly)
      • Haematopinus eurysternus, female
      • Haematopinus eurysternus, male
      • Haematopinus suis, female
      • Haematopinus suis, male
      • Haemobartonella felis, feline blood smear
      • Haemonchus contortus
      • Haemonchus contortus, abomasum, sheep
      • Haemonchus contortus, eggs
      • Haemonchus placei, adult female
      • Haemonchus placei, eggs
      • Halogeton glomeratus (Halogeton)
      • Halogeton glomeratus (Halogeton), flowering plant
      • Haplopappus heterophyllus (Rayless goldenrod)
      • Head of Asian tapeworm, Bothriocephalus acheilognathus
      • Head pressing, horse
      • Healing tongue vesicles
      • Heel erosion
      • Heel erosion and black necrotic horn
      • Helenium hoopesii (Sneezeweed)
      • Hemipenal bulges, male gecko
      • Hemivertebra, dog
      • Hemorrhages in sole
      • Hemorrhagic enteritis, enlarged spleen, turkey
      • Hemorrhagic enteritis, intestinal hemorrhaging, turkey
      • Hemorrhagic gastrohepatic lymph node
      • Hemorrhagic pneumonia, mink
      • Hemorrhagic septicemia, water buffalo
      • Hemorrhagic skeletal muscle, scurvy, guinea pig
      • Hemorrhagic ulcer, body wall, koi
      • Heterakis gallinarum, cecal pouches, chicken
      • Heteropolaria
      • Hiatal hernia, dog
      • High-pressure glaucoma, dog
      • High ringbone
      • Hip dysplasia, German Shepherd
      • Hip luxation
      • Histomonas meleagridis, bulls-eye lesions, liver, turkey
      • Histomonas meleagridis, liver, turkey
      • Histopathology of avianpox virus infection showing cytoplasmic inclusion bodies
      • Histophilus somni lesions, calf
      • Histoplasma capsulatum, lymph node smear
      • Hog louse, Haematopinus suis, skin
      • Hookworm (Kalicephalus spp) ova, chondropython
      • Hookworm eggs
      • Horizontal groove approaching thimble
      • Horizontal groove or fissure
      • Horse biting louse, Damalinia (Bovicola) equi
      • Horse digit, median section
      • Horse hoof
      • Horse sucking louse, Haematopinus asini
      • Hutch burn (urine scalding), rabbit
      • Hyacinthus spp (Hyacinth), flower
      • Hydrocephalus, foal
      • Hydronephrosis, pyelogram
      • Hymenoxys odorata (Bitter rubberweed)
      • Hymenoxys richardsonii (Colorado rubber weed)
      • Hyostrongylus rubidus, egg
      • Hyostrongylus rubidus, nodules, stomach
      • Hyperadrenocorticism, Poodle
      • Hyperemia, abdomen and legs
      • Hypericum perforatum (St. John's-wort, Goatweed, Klamath weed)
      • Hyperkalemic periodic paralysis
      • Hyperkeratosis of footpads, ferret
      • Hyperlipemia, horse
      • Hypoderma spp, 3rd stage larva
      • Ichthyophonus hoferi, kidney, angelfish
      • Ichthyophthirius multifiliis
      • Icteric mucous membranes, foal
      • Ileocecal intussusception, horse
      • Ilex aquifolium (English holly), branch with berries
      • Immature phallus, ostrich
      • Immune-mediated hemolytic anemia, slide agglutination
      • Inclusion body hepatitis, chicken
      • Indwelling catheter for intra-uterine treatment in mares
      • Infectious bovine keratoconjunctivitis
      • Infectious bronchitis, airsacculitis, chicken
      • Infectious bronchitis, wrinkled egg shells
      • Infectious bursal disease, chicken
      • Infectious coryza, swollen sinuses, hen
      • Infectious keratoconjunctivitis, cow
      • Infectious laryngotracheitis, chicken
      • Infectious sinusitis in a turkey due to Mycoplasma gallisepticum
      • Infectious stomatitis (mouth rot)
      • Inflammatory mammary gland carcinoma in a dog
      • Inguinal canal, horse
      • Inguinal hernia, horse
      • Insulinoma, ferret
      • Insulinoma and concurrent adrenal disease, ferret
      • Interdigital cleft vesicle
      • Interdigital dermatitis
      • Interdigital dermatitis and interdigital fibroma
      • Interdigital dermatitis of heel bulbs
      • Interdigital fibroma, or "corn"
      • Interdigital furunculosis, dog
      • Interdigital phlegmon (footrot)
      • Internal and external ears, dog
      • Interosseous medius, horse
      • Intersex condition with abnormal genitalia, horse
      • Interstitial keratitis, dog
      • Interstitial nephritis, leptospirosis, pig
      • Intervertebral disk disease, radiograph, dog
      • Intestinal rupture, foal
      • Intracellular cysts of Encephalitozoon cuniculi, brain, rabbit
      • Intracellular cysts of Encephalitozoon cuniculi, renal cells, rabbit
      • Iridal melanoma, dog
      • Iridic cysts, dog
      • Iridociliary melanoma, dog
      • Iris atrophy, dog
      • Islet cell adenoma, pancreas, ferret
      • Isospora amphiboluri oocysts
      • Ixodes ricinus
      • Ixodes scapularis
      • Jejunal hemorrhage syndrome
      • Juglans nigra (Black walnut)
      • Juglans nigra (Black walnut), leaves and fruit
      • Juglans nigra (Black walnut), shavings
      • Junctional epidermolysis bullosa, horse
      • Kalanchoe spp (Crassulaceae) Kalanchoe, Air-plant, Cathedral-bells
      • Kalmia spp (Laurel, Ivybush, Lambkill)
      • Keratoconjunctivitis sicca, dog
      • Keratoma, parakeet
      • Knemidocoptes mutans, skin lesions
      • Kochia scoparia (Kochia)
      • Kochia scoparia (Kochia), seedling
      • Lacrimal apparatus, dog
      • Lagophthalmos and pigmentary keratitis, dog
      • Laminitis, clinical lesions
      • Landmarks, forelimb nerve block, horse
      • Lantana spp (Lantana)
      • Larynx and laryngeal hemiplegia, horse
      • Lechiguana, subcutaneous mass
      • Left inguinal hernia, potbellied pig
      • Left laryngeal hemiplegia
      • Leishmania spp, equine skin
      • Lens subluxation, dog
      • Leopard gecko
      • Leptospira interrogans
      • Leptospira interrogans, porcine kidney
      • Leptospira interrogans serovar hardjo
      • Lesions of columnaris disease, channel catfish
      • Lesions typical of "red sore disease"
      • Leucocytozoon gametocytes in a blood smear from a Red-tailed hawk (Buteo jamaicensis)
      • Leucocytozoon parasite, turkey blood
      • Leukocytozoon, avian blood smear
      • Lid masses, dog
      • Ligustrum spp (Privet, Ligustrum, Hedge plant)
      • Limbal or epibulbar melanoma
      • Limb edema, horse
      • Lingual candidiasis, dolphin
      • Linognathus vituli, female
      • Linognathus vituli, male
      • Listerial encephalitis (microabscessation), cow
      • Listeria monocytogenes, smear of brain stem
      • Listeriosis, goat
      • Little blue cattle louse, Solenopotes capillatus, dewlap
      • Llamas at a show in Peru
      • Llamas in a packing contest in Peru
      • Lobomycosis, dolphin
      • Long-nosed cattle louse, Linognathus vituli, skin
      • Louse eggs or "nits"
      • Lumpy jaw, cow
      • Lumpy skin disease, ulcers
      • Lupinus sericeus (Lupine)
      • Lupinus sericeus (Lupine), close-up
      • Lymphadenitis, guinea pig
      • Lymphocytic pyometra, cow
      • Lymphoid leukosis, lymphocytic infiltration, liver
      • Lymphoid leukosis, lymphocytic infiltration, muscle
      • Macaca fascicularis (cynomolgus monkey)
      • Macaca mulatta (rhesus monkey)
      • Macracanthorhynchus hirudinaceus
      • Malassezia otitis, dog
      • Male ostrich kanteling
      • Malignant edema, pig
      • Malignant melanoma
      • Malignant melanoma, hamster
      • Malignant testicular interstitial cell tumor in an aged mahogany glider (Petaurus gracilis)
      • Mandibular dental fistula, horse
      • Mange (Cnemidocoptes), beak and face, parakeet
      • Mange lesions, alpaca
      • Marek's disease, eye involvement, chicken
      • Marek's disease, leg paresis, chicken
      • Marek's disease, liver and spleen involvement, chicken
      • Marek's disease, skin involvement, chicken
      • Mast cell tumor, dog
      • Mast cell tumor in the left hind foot of a basset hound
      • Mastitis, mare
      • Maxilla and mandible, llama
      • Maxillary sinus, dog
      • Medial metatarsal vein, ostrich chick
      • Medial patellar luxation, dog
      • Melia azedarach (Chinaberry), berries
      • Melia azedarach (Chinaberry), mature plant with berries
      • Melia azedarach (Chinaberry), young plant
      • Melilotus officinalis (Sweet clover)
      • Melilotus spp (sweet clover)
      • Melophagus ovinus, sheep
      • Melophagus ovinus (sheep ked)
      • Meningitis, head-pressing
      • Mesenteric hemorrhage
      • Metallic foreign bodies, radiograph, ostrich chick
      • Metastatic pulmonary lesions
      • Migrating swine kidney worm
      • Mildly overgrown beak
      • Mild radiographic lesions of canine heartworm disease
      • Mink kit showing signs of canine distemper
      • Mink viral enteritis
      • Mites in snake's water dish
      • Moderately severe ulcer, equine stomach
      • Moniezia expansa, egg
      • Moniezia expansa, mature proglottids
      • Mouse hepatitis virus, syncytia in intestinal epithelium
      • Mousepox, inclusion bodies in epidermal cells
      • Multifocal nodules, dermis and subcutaneous tissues
      • Multiple cartilaginous exostoses
      • Musca autumnalis
      • Muzzle trauma, horse
      • Mycobacterium bovis, tissue smear
      • Mycobacterium bovis granulomas, cow
      • Mycobacterium marinum
      • Mycobacterium tuberculosis, granulomatous lesions, cow lung
      • Mycobacterium tuberculosis, tissue smear
      • Mycoplasma (Eperythrozoon) suis, porcine blood smear
      • Mycoplasma hyopneumonia, gross lesions
      • Mycotic keratitis, Aspergillus
      • Mycotic stomatitis, dog
      • Myobia musculi lesions, mouse
      • Myxomatosis, rabbit
      • Nandina domestica (Nandina, Heavenly bamboo, Chinese sacred bamboo)
      • Narcissus spp (Amaryllis)
      • Nasal aspergillosis, gross lesions, dog
      • Nasal foreign body, radiograph, dog
      • Nasal mite (endoscopic view)
      • Nasal septal thickening, horse
      • Nasal tumor, radiograph, cat
      • Nasitrema spp, ova
      • Navicular disease
      • Neck lesions (teeth), radiograph, cat
      • Nematodirus helvetianus, egg
      • Nematodirus spp
      • Neotrombicula autumnalis
      • Nephrolithiasis, horse
      • Nephrosplenic ligament, horse
      • Nerium oleander (Oleander)
      • Nerium oleander (Oleander), close-up
      • Nocardia asteroides, Gram's stain
      • Nocardia asteroides, tissue smear
      • Nodulectomy, pancreas, ferret
      • Nodules of Filaroides (Oslerus) osleri
      • Nolina texana (Sacahuista, Beargrass)
      • Nonseptate hyphae typical of Saprolegnia, gill tissue
      • Normal hematopoiesis
      • Nuclear sclerosis, dog
      • Nutritional secondary hyperparathyroidism, iguana
      • Oblique comminuted femoral fracture
      • Occipitoatlantoaxial malformation, radiograph, dog
      • Ocular squamous cell carcinoma, horse
      • Oesophagostomum columbianum, eggs
      • Oesophagostomum nodules, abomasum, sheep
      • Oesophagostomum radiatum
      • Oesophagostomum radiatum, eggs
      • Oesophagostomum spp, adults
      • Oesophagostomum spp, egg
      • Oestrus ovis, gross lesion, sheep nares
      • Ollulanus tricuspis
      • Onchocerca-associated dermatitis, horse
      • Onchocerca cervicalis microfilariae
      • Onchocerca nodule, conjunctiva, horse
      • Open toe ulcer
      • Ophionyssus natricis (a snake mite)
      • Optic nerve and retinal atrophy, dog
      • Optic nerve hypoplasia, dog
      • Oral fibrosarcoma, dog
      • Oral malignant melanoma, cat
      • Oral malignant melanoma, dog
      • Oral malignant melanoma, radiograph, cat
      • Oral mast cell tumor, dog
      • Oral squamous cell carcinoma, cat
      • Oral squamous cell carcinoma, dog
      • Orbital cellulitis, acute onset
      • Orbital cellulitis, dog
      • Orbital neoplasm, dog
      • Ornithodoros moubata
      • Ornithonyssus sylviarum mites, hen
      • Oslerus (Filaroides) osleri larva
      • Osteochondrosis
      • Osteochondrosis of the shoulder in a 5-mo old Irish Wolfhound
      • Osteochondrosis of the stifle, dog
      • Osteology of the digits
      • Osteomyelitis, dog
      • Osteosarcoma, dog
      • Ostertagia circumcincta
      • Ostertagia circumcincta, eggs
      • Ostertagia ostertagi
      • Ostrich chicks in run
      • Ostrich eggs hatching
      • Ostrich eggs in incubator
      • Ostrich scrape (nest)
      • Ostrich semen
      • Otitis media-interna, horse
      • Otitis media-interna, radiograph
      • Otobius megnini
      • Otostrongylus circumlitus, larva
      • Ovarian cyst, canine
      • Ovarian tumor
      • Oxytenia acerosa (Copperweed)
      • Oxytenia acerosa (Copperweed), flowering plant
      • Oxytropis sericea (White point locoweed)
      • Oxyuris equi, egg
      • Pannus, dog
      • Papilledema, dog
      • Papio spp (baboon)
      • Paragonimus spp, radiograph
      • Parakeratosis, deep crusty lesions
      • Parakeratosis, typical lesions
      • Paramphistomum cervi
      • Parapox virus, pseudocowpox
      • Parascaris equorum
      • Parascaris equorum, egg
      • Pardalis chameleon, female
      • Pardalis chameleon, male
      • Parulis, dog
      • Patent ductus arteriosus, dog
      • Patent urachus, foal
      • Pedunculated lipoma
      • Peganum harmala (African rue)
      • Pelger-Huët anomaly, canine blood smear
      • Pelodera strongyloides dermatitis, dog
      • Pelvic radiograph, potbellied pig
      • Pemphigus foliaceus, dog
      • Pemphigus vulgaris, dog
      • Penetrating injury (cornea and lens)
      • Peracute mastitis, cow
      • Periapical lesion, dog
      • Pericardial effusion, dog
      • Perilla frutescens (Perilla mint, Beefsteak plant)
      • Periodontitis, cat
      • Periodontitis, dog
      • Periodontitis, radiograph, cat
      • Persea americana, "Don Gillogly" variety flower
      • Persea americana (Lauraceae) Avocado pear, Alligator pear
      • Persistent hymen, mare
      • Persistent pupillary membranes
      • Persistent pupillary membranes, dog
      • Peste des petits ruminants, oral lesions
      • Petechiae, mucous membranes, mouth
      • Phenylbutazone toxicity (colitis), horse
      • Philodendron spp (Philodendron)
      • Philodendron spp (Philodendron), Red Princess variety
      • Philodendron spp (Philodendron), variety
      • Phoradendron (Mistletoe)
      • Phoradendron serotinum (Mistletoe), branch with berries
      • Photinia spp (Red tip photinia)
      • Photinia spp (Red tip photinia), flower
      • Photinia spp (Red tip photinia), young plant
      • Photosensitization, cow
      • Photosensitization, horse
      • Physocephalus sexalatus, adults
      • Physocephalus sexalatus, egg
      • Phytolacca americana (Pokeweed, Poke)
      • Phytolacca americana (Pokeweed, Poke), close-up
      • Phytolacca americana (Pokeweed, Poke), flowering plant
      • Pinus ponderosa (Ponderosa pine)
      • Pityriasis rosea, ring-like lesions
      • Pityriasis rosea lesions, hind limb
      • Pityriasis rosea lesions, young pig
      • Placentitis, leptospiral abortion, pig
      • Placing hood for restraint, step 1
      • Placing hood for restraint, step 2
      • Placing hood for restraint, step 3
      • Plasma cell stomatitis, cat
      • Pneumocystis jiroveci
      • Pneumonia due to Rhodococus equi, radiograph
      • Pneumonyssus caninum (nasal mite)
      • Polioencephalomalacia, cortex, macroscopic view
      • Polioencephalomalacia, dorsal parietal cortex
      • Poor feathering, malabsorption syndrome
      • Porcine circovirus type 2
      • Porcine intestinal adenomatosis
      • Porcine proliferative adenomatosis
      • Positive Rivalta's test in a cat with FIP
      • Posture typical of laminitis
      • Potbellied pig and litter
      • Pox disease, cutaneous form, Fischer's lovebirds
      • Pre-anal pores, male leopard gecko
      • Primary lung tumor, radiograph
      • Prognathia, canine model
      • Prognathia, dog
      • Prognathia, pony
      • Progressive retinal atrophy
      • Prolapsed caudal vaginal mucosa, ewe
      • Proliferative ileitis, gross lesions, hamster
      • Proptosis, dog
      • Prostatomegaly, radiograph
      • Prunus virginiana (Choke cherry)
      • Prunus virginiana (Choke cherry), close-up
      • Psilocybe spp
      • Psittacine beak and feather disease, cockatoo
      • Psittacine proventricular dilatation syndrome, gross lesions, macaw
      • Psoroptes cuniculi, gross lesions, rabbit
      • Psoroptes ovis, female
      • Psoroptes ovis, male
      • Psoroptic mange, sheep
      • Pteridium aquilinum (bracken fern)
      • Pteridium aquilinum (Bracken fern)
      • Pulmonary aspergillosis, gross lesions, parrot
      • Pulmonary metastasis, lateral projection, in a dog with renal cell carcinoma
      • Pulmonary metastasis, radiograph
      • Pulmonic stenosis, dog
      • Pulpal hyperemia, dog
      • Pulpitis, dog
      • Purpura hemorrhagica
      • Purpura hemorrhagica, ocular lesions
      • Pyelonephritis, chronic and acute
      • Pyometra, mare
      • Pyometra, radiograph, Norwegian Elkhound
      • Pythium insidiosum, "kunkers"
      • Pythium insidiosum, horse
      • Quercus spp (oak)
      • Quercus spp (Oak)
      • Quercus spp (oak), leaves
      • Rabies, raccoon
      • Radiograph of left distal humerus and elbow, potbellied pig
      • Recent ovulation in transected ovary, horse
      • Rectal prolapse, potbellied pig
      • Rectal prolapse, sheep
      • Recurrent airway obstruction (heaves)
      • Recurrent equine uveitis
      • Recurrent uveitis, horse
      • Red-leg syndrome, leopard frogs
      • Release of merozoite from mature schizont
      • Removal of preputial diverticulum, pig
      • Renal calculi, radiograph
      • Renal calculus, Collie
      • Renal calculus, Samoyed
      • Rent in aorta, turkey
      • Retained deciduous incisors, horse
      • Retained deciduous premolars, horse
      • Retained deciduous teeth, dog
      • Retained placenta with green lochia, dog
      • Retinal detachment
      • Retinal dysplasia, dog
      • Retinal pigment epithelium dystrophy, dog
      • Rhabdias/Strongyloides larva in fresh feces
      • Rhipicephalus sanguineus
      • Rhododendron spp (Azalea)
      • Rhododendron spp (Rhododendron)
      • Ricinus communis (Castor bean)
      • Right displaced abomasum with volvulus, cow
      • Right dorsal displacement of colon, horse
      • Right ventricular hypertrophy, dog
      • Rinderpest, necrosis and fibronecrotic exudate
      • Ringtail, rat
      • Ringworm (Trichophyton), guinea pig
      • Robinia pseudoacacia (Black locust, False acacia, Locust tree)
      • Robinia pseudoacacia (Black locust, False acacia, Locust tree), branch
      • Rotated tibia, valgus deviation, chicken
      • Rough coronary band and sandcrack
      • Roundworm eggs
      • Rumex crispus (Curly dock, Dock, Sorrel)
      • Ruptured retropharyngeal, S equi abscess
      • Ruptured submandibular abscesses
      • Rupture of the longus capitus muscle
      • Sacrocaudal dysgenesis, Manx cat
      • Saguinus spp (cotton top marmoset)
      • Saimiri sciureus (squirrel monkey)
      • Salmonella typhimurium, ileum, calf
      • Salmonellosis, equine colon
      • Sandcrack type III
      • Sandcrack type V
      • Sansevieria spp (Snake plant)
      • Sarcobatus vermiculatus (Greasewood)
      • Sarcoid, medial upper eyelid
      • Sarcoid, upper eyelid
      • Sarcoptes scabiei var bovis, female
      • Sarcoptes scabiei var bovis, male
      • Sarcoptes scabiei var canis
      • Sarcoptes scabiei var suis
      • Sarcoptic mange, dog
      • Sarcoptic mange, hind legs, cow
      • Sarcoptic mange, pig
      • Scab-like lesion, fowlpox, broiler breeder male
      • Scab-like lesion, fowlpox, laying hen
      • Scab-like lesion, fowlpox, turkey
      • Schefflera spp (Umbrella tree), varigated variety
      • Schistosoma bovis egg
      • Sendai virus, peribronchiolar inflammation
      • Senecio jacobaea (Tansy ragwort).
      • Senecio jacobea (tansy ragwort)
      • Senecio longilobus (Threadleaf groundsel)
      • Senecio ridellii (Riddell's groundsel)
      • Septic arthritis, calf
      • Septic arthritis, digit, bull
      • Septicemic cutaneous ulcerative disease, slider turtle
      • Serous tarsitis (bog spavin, puffy hock)
      • Sesbania (Glottidium) vesicaria (Bladderpod, Rattlebox, Sesbane, Coffeebean)
      • Sesbania (Glottidium) vesicaria (Bladderpod, Rattlebox, Sesbane, Coffeebean), flowering plant
      • Severe radiographic lesions of canine heartworm disease
      • Severe ulceration, equine stomach
      • Sexing snakes
      • Sheep biting louse, Damalinia (Bovicola) ovis
      • Sheeppox lesions
      • Sheep poxvirus
      • Shope fibroma, rabbit
      • Short-nosed cattle louse, Haematopinus eurysternus, skin
      • Sialodacryoadenitis, rat
      • Sidebone
      • Sinus with Oestrus ovis 3rd stage larvae
      • Sites for high nerve block of pelvic limb, ruminants
      • Sites for nerve block, metacarpal and digital areas, cattle
      • Sites for nerve block, metatarsal and digital areas, cattle
      • Skeleton of the leg, chicken and turkey
      • Skin lesions, erysipelas
      • Skull, female llama
      • Slab fracture, C3
      • Slipper foot
      • Small strongyle egg (left) and large strongyle egg (right), 400×
      • Solanum carolinense (Horse nettle)
      • Solanum nigra (Black nightshade)
      • Solanum nigra (Black nightshade), with berries
      • Solanum pseudocapsicum (Jerusalem cherry).
      • Solanum rostratum (Buffalo burr), flowering plant
      • Solanum rostratum (Buffalo burr), young plant
      • Solanum tuberosum (Potato)
      • Solar-induced squamous cell carcinoma in the white skin of a dog
      • Sole abscess, radiograph, horse
      • Solenopotes capillatus, female
      • Solenopotes capillatus, male
      • Sole ulcer over flexor process of distal phalanx
      • Sole ulcer under sole
      • Sole ulcer with "V"
      • Sorghum halepense (Johnson grass)
      • Sorghum vulgare (Sorghum, Sudan grass, Kafir, Durra, Milo, Broom-corn, Schrock, etc)
      • Spastic paresis
      • Spinal cervical nerves for nerve block, cow
      • Spinal cord compression
      • Spinal vertebral body abscess
      • Spirocerca lupi
      • Spirocerca lupi, egg
      • Spirocerca lupi, esophagus
      • Spironucleus vortens, angelfish
      • Splints (interosseous desmitis)
      • Sporothrix schenckii, tissue smear
      • Squamous cell carcinoma, cat
      • Squamous cell carcinoma, cattle
      • Squamous cell carcinoma, cow
      • Squamous cell carcinoma, eyelid
      • Squamous cell carcinoma, horse
      • Squamous cell carcinomas, cat
      • Squamous cell carcinomas, dog
      • Steatitis, mink
      • Stomach, llama
      • Stomoxys calcitrans (stable fly)
      • Strangles
      • Strangles, brain abscess
      • Streptococcus equi retropharyngeal abscess
      • Streptococcus suis, colony
      • Streptococcus suis, Gram's stain
      • Stretching position, colic
      • Strongyloides papillosus, eggs
      • Strongyloides stercoralis larvae, canine skin
      • Strongyloides westeri
      • Strongyloides westeri, egg
      • Strongylus vulgaris, egg
      • Strongylus vulgaris adults, equine intestine
      • Struvite bladder stones, Dachshund, radiograph
      • Struvite calculi removed from bladder
      • Struvite stone
      • Stylohyoid fracture, horse
      • Subacute exudative epidermitis
      • Subconjunctival hemorrhage, dog
      • Subepiglottic cyst, horse
      • Subspectacle abscessation, African ball python
      • Subspectacle abscessation, snakes
      • Superficial keratitis, dog
      • Superficial pyoderma, dog
      • Supernumerary teeth, canine incisors
      • Supernumerary teeth, canine premolars
      • Supernumerary teeth, radiograph, dog
      • Supernumerary teeth, radiograph, horse
      • Swine dysentery, gross lesions
      • Swinepox lesions
      • Swollen hyperkeratotic footpads, mink
      • Syngamus trachea worms, tracheal lumen
      • Synovial cell sarcoma, dog
      • Syphacia muris, ova
      • Tabanus spp (horse fly)
      • Taenia sp, cat
      • Tarsal cellulitis
      • Taxus spp (Yew)
      • Taxus spp (Yew), close-up with berries
      • Teat vesicles, bovine
      • Terminal stage of distemper, ferret
      • Tetradymia canescens (Spineless horsebrush)
      • Tetradymia glabrata (Little leaf horsebrush)
      • Thelazia californiensis, horse
      • Thin-walled intestine, malabsorption syndrome
      • Thoracic blastomycosis, radiograph, dog
      • Thoracic hemorrhage
      • Thoracic histoplasmosis, radiograph, dog
      • Thrush, quail
      • Thyroid nodule, cat
      • Thysanosoma actinioides, adult, sheep
      • Tibial dyschondroplasia, cartilaginous core, chicken
      • Tibial dyschondroplasia, degrees of severity
      • Toe ulcer
      • Tongue vesicle, bovine
      • Toxocara canis
      • Toxocara canis ova
      • Toxocara vitulorum
      • Tracheal collapse, dog
      • Trachea with excessive amount of mucus.
      • Transitional cell carcinoma, canine bladder, contrast radiograph
      • Transitional cell carcinoma, canine bladder, histopathology
      • Transitional cell carcinoma, canine bladder, pneumocystogram
      • Transverse section of the dorsal parietal cortex of a feedlot steer with polioencephalomalacia
      • Traumatic proptosis, dog
      • Traumatic retrobulbar hemorrhage
      • Trichinella spiralis, female
      • Trichinella spiralis, muscle biopsy
      • Trichomoniasis, pigeon
      • Trichostrongylus axei
      • Trichostrongylus axei, egg
      • Trichuris ovis, intestinal wall, sheep
      • Trichuris spp, eggs
      • Trichuris suis
      • Trichuris suis, adults
      • Trichuris suis, egg
      • Trichuris vulpis
      • Trichuris vulpis, egg
      • Triglochin maritima (Arrow grass)
      • Trypanosoma vivax, bovine blood smear
      • Tuberculin skin test, pig ear
      • Tympanic bulla and membrane, cat
      • Typical white line lesion
      • Typical white spots characteristic of "ich"
      • Ulcerative dermatitis (scale rot, necrotic dermatitis), ball python
      • Ulcerative pododermatitis (sore hocks), rabbit
      • Ulceroproliferative faucitis/stomatitis
      • Umbilicus, horse
      • Unigland mastitis, sow
      • Ununited anconeal process
      • Upper panel: occlusal view on the lower incisors of a 6-year-old mare
      • Urate bladder stones, Dalmatian
      • Urethral calculi, Dalmatian
      • Urolithiasis, stallion (endoscopy)
      • Urticaria, horse
      • Uterus with pyometra, dog
      • Vaginal prolapse, beef cow
      • Vaginoscopy equipment
      • Ventricular septal defect, calf
      • Veratrum californicum (False hellebore)
      • Vertical fissures (sandcrack)
      • Vesicle on upper gum, sheep
      • Vicunas, close up
      • Vicunas being rounded up
      • Viral arthritis, rupture of gastrocnemius tendon
      • Viscera, budgerigar
      • Visceral gout, Argentine boa
      • Vitamin D deficiency, malformed beak, dove
      • Vitiligo, Golden Retriever
      • Volvulus of large colon, horse
      • Volvulus of small intestine, horse
      • Wave mouth and step mouth, horse
      • White granulomatous lesions, heart, largemouth bass
      • White line abscess
      • White muscle disease
      • Xanthium strumarium (Cocklebur)
      • Xanthium strumarium (Cocklebur), dried specimen
      • Zalophotrema hepaticum, ova
      • Zamia spp (Cycad)
      • Zigadenus venosa (Death camas)
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