honeypot link
skip to main content
Professional
Consumer
MERCK MANUAL
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
DRUG INFO
RESOURCES
COMMENTARY
ABOUT US
HEALTH TOPICS
HEALTHY LIVING
<
$name
Infections
Expand all
Collapse all
Biology of Infectious Disease
Fever in Adults
Consequences of fever
Causes
Infectious causes
Neoplastic causes
Inflammatory causes
Risk factors
Evaluation
Warning signs
When to see a doctor
What the doctor does
Testing
Fever of unknown origin (FUO)
Treatment
Essentials for Older People
Key Points
Overview of Infectious Disease
Effects and Symptoms of Infection
Resident Flora
Development of Infection
Production of toxins and enzymes
Blockage of the body's defenses
Malfunction of the immune system
Defenses Against Infection
Natural Barriers Against Infection
The Blood
Inflammation
Immune Response
Fever
Prevention of Infection
More Information
Infections in People With Impaired Defenses
Diagnosis of Infectious Disease
Diagnosis of Infectious Disease
Samples for Testing
Staining and Examination Using a Microscope
Culture of Microorganisms
Testing a Microorganism's Susceptibility and Sensitivity to Antimicrobials
Tests That Detect Antibodies to or Antigens of Microorganisms
Antibody tests
Antigen tests
Tests That Detect Genetic Material in Microorganisms
Other Tests Used to Identify Microorganisms
Antibiotics
Aminoglycosides
Use of Aminoglycosides During Pregnancy and Breastfeeding
Aztreonam
Use of Aztreonam During Pregnancy and Breastfeeding
Carbapenems
Use of Carbapenems During Pregnancy and Breastfeeding
Cephalosporins
Use of Cephalosporins During Pregnancy and Breastfeeding
Chloramphenicol
Use of Chloramphenicol During Pregnancy and Breastfeeding
Clindamycin
Use of Clindamycin During Pregnancy and Breastfeeding
Daptomycin
Use of Daptomycin During Pregnancy and Breastfeeding
Fluoroquinolones
Use of Fluoroquinolones During Pregnancy and Breastfeeding
Fosfomycin
Use of Fosfomycin During Pregnancy and Breastfeeding
Glycopeptides and Lipoglycopeptides
Use of Glycopeptides and Lipoglycopeptides During Pregnancy and Breastfeeding
Macrolides
Use of Macrolides During Pregnancy and Breastfeeding
Metronidazole and Tinidazole
Use of Metronidazole or Tinidazole During Pregnancy and Breastfeeding
Nitrofurantoin
Use of Nitrofurantoin During Pregnancy and Breastfeeding
Oxazolidinones: Linezolid and Tedizolid
Use of Linezolid and Tedizolid During Pregnancy and Breastfeeding
Penicillins
Use of Penicillins During Pregnancy and Breastfeeding
Polypeptides
Use of Polypeptides During Pregnancy and Breastfeeding
Quinupristin and Dalfopristin
Use of Dalfopristin/Quinupristin During Pregnancy and Breastfeeding
Rifamycins
Use of Rifamycins During Pregnancy and Breastfeeding
Sulfonamides
Use of Sulfonamides During Pregnancy and Breastfeeding
Tetracyclines
Use of Tetracyclines During Pregnancy and Breastfeeding
Tigecycline
Use of Tigecycline During Pregnancy and Breastfeeding
Trimethoprim and Sulfamethoxazole
Use During Pregnancy and Breastfeeding
Lefamulin
Use of Lefamulin During Pregnancy and Breastfeeding
Mupirocin
Overview of Antibiotics
Selecting an Antibiotic
Antibiotic Resistance
Taking Antibiotics
Taking antibiotics to prevent infections
Taking antibiotics during pregnancy and breastfeeding
Home Antibiotic Therapy
Side Effects of Antibiotics
Allergic Reactions to Antibiotics
Arboviruses, Arenaviruses, Filoviruses
Chikungunya Disease
Symptoms
Diagnosis
Treatment
Prevention
More Information
Ebola Virus and Marburg Virus Infections
Transmission of Ebola and Marburg viruses
Symptoms
Diagnosis
Treatment
Prevention
Lassa Fever and South American Hemorrhagic Fevers
Symptoms
Diagnosis
Treatment
Prevention
More Information
Zika Virus Infection
Transmission of Zika Virus
Symptoms
Zika virus infection in babies of infected mothers
Diagnosis
Treatment
Prevention
Prevention of sexual transmission of Zika virus
More Information
Overview of Arbovirus, Arenavirus, and Filovirus Infections
Arboviruses
Arenaviruses
Filoviruses
Diagnosis
Treatment
Prevention
Preventing exposure to a virus
Vaccination
More Information
Lymphocytic Choriomeningitis
Symptoms
Diagnosis
Treatment
Prevention
More Information
West Nile Virus Infection
Symptoms
Diagnosis
Treatment
Prevention
More Information
Hantavirus Infection
Symptoms
Hantavirus pulmonary syndrome
Hemorrhagic fever with renal syndrome
Diagnosis
Treatment
Yellow Fever
Symptoms
Diagnosis
Treatment
Prevention
More Information
Dengue
Symptoms
Dengue hemorrhagic fever
Diagnosis
Treatment
Prevention
Dengue vaccine
More Information
Bacteremia, Sepsis, and Septic Shock
Introduction to Bacteremia, Sepsis, and Septic Shock
Bacteremia
Causes
Symptoms
Diagnosis
Treatment
Prevention
Sepsis and Septic Shock
Causes
Complications
Risk Factors
Symptoms
Diagnosis
Treatment
Antibiotics
Intravenous fluids
Oxygen
Removal of the source of infection
Other treatments
Prognosis
Bacterial Infections: Overview
Overview of Bacteria
Classification of Bacteria
Bacterial Infections
Bacterial Defenses
Biofilm
Capsules
Outer membrane
Spores
Flagella
Antibiotic resistance
Bacterial Infections: Anaerobic Bacteria
Botulism
Causes
Foodborne botulism
Wound botulism
Enteric botulism
Symptoms
Diagnosis
Treatment
Antitoxin
Prevention
More Information
Overview of Anaerobic Bacteria
Actinomycosis
Symptoms
Abdominal actinomycosis
Pelvic actinomycosis
Cervicofacial actinomycosis
Thoracic actinomycosis
Generalized actinomycosis
Diagnosis
Treatment
Prognosis
Overview of Clostridial Infections
Clostridial food poisoning
Clostridial abdominal and pelvic infections
Clostridial necrotizing enteritis, neutropenic enterocolitis, and neonatal necrotizing enterocolitis
Clostridia in the bloodstream
Infant Botulism
Symptoms
Diagnosis
Treatment
More Information
Clostridioides difficile
Infection
Causes
Symptoms
Diagnosis
Treatment
Treatment of recurrences
Gas Gangrene and Other Clostridial Soft-Tissue Infections
Causes
Symptoms
Diagnosis
Treatment
Prevention
Tetanus
Symptoms
Diagnosis
Treatment
Management of symptoms
Prognosis
Prevention
Vaccination
After a wound
More Information
Bacterial Infections: Gram-Negative Bacteria
Legionella
Infections
Symptoms
Diagnosis
Treatment
More Information
Brucellosis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Cat-Scratch Disease
Symptoms
Diagnosis
Treatment
More Information
Typhoid Fever
Transmission
Spread through the bloodstream
Symptoms
Diagnosis
Treatment
Treatment of carriers
Prognosis
Prevention
Vaccination
More Information
Overview of Gram-Negative Bacteria
Tularemia
Transmission
Spread through the bloodstream
Types
Ulceroglandular tularemia
Glandular tularemia
Oculoglandular tularemia
Oropharyngeal tularemia
Typhoidal tularemia
Pneumonic tularemia
Septicemic tularemia
Symptoms
Diagnosis
Treatment
Prognosis
Prevention
More Information
Campylobacter
Infections
Symptoms
Complications
Diagnosis
Treatment
More Information
Cholera
Symptoms
Diagnosis
Treatment
Replacement of lost body water and salts
Antibiotics
Prevention
Vaccines
More Information
Klebsiella
,
Enterobacter
, and
Serratia
Infections
Diagnosis
Treatment
Escherichia coli
Infections
E. coli
O157:H7 infection
Symptoms
Traveler's diarrhea
E. coli
O157:H7
Diagnosis
Treatment
Traveler's diarrhea
Diarrhea due to
E. coli
O157:H7
Other
E. coli
infections
Prevention
More Information
Haemophilus influenzae
Infections
Diagnosis
Treatment
Prevention
More Information
Plague and Other
Yersinia
Infections
Transmission of plague
Symptoms
Bubonic plague
Pneumonic plague
Septicemic plague
Pestis minor
Diagnosis
Treatment
Prevention
After exposure to plague
More Information
Other
Yersinia
Infections
Pseudomonas
Infections
Symptoms
Diagnosis
Treatment
Salmonella
Infections
Spread through the bloodstream
Symptoms
Diagnosis
Treatment
Prevention
More Information
Shigellosis
Symptoms
Complications of shigellosis
Diagnosis
Treatment
Prevention
More Information
Pertussis
Symptoms
Diagnosis
Treatment
Prevention
Vaccination
After exposure to pertussis
More Information
Bacterial Infections: Gram-Positive Bacteria
Enterococcal Infections
Treatment
Erysipeloid
Symptoms
Diagnosis
Treatment
Diphtheria
Symptoms
Diagnosis
Treatment
Prevention
Vaccination
After exposure to diphtheria
More Information
Overview of Gram-Positive Bacteria
Nocardiosis
Symptoms
Lung infection
Skin infection
Brain infection
Diagnosis
Treatment
Prognosis
Anthrax
Symptoms
Skin anthrax (cutaneous anthrax)
Inhalation anthrax
Ingestion (Oropharyngeal and Gastrointestinal anthrax)
Injection anthrax
Diagnosis
Treatment
Prevention
Listeriosis
Invasive listeriosis
Risk factors
Symptoms
Diagnosis
Treatment
Prevention
More Information
Pneumococcal Infections
Risk factors
Symptoms and Diagnosis
Pneumococcal pneumonia
Pneumococcal meningitis
Pneumococcal otitis media
Pneumococcal sinusitis
Pneumococcal bacteremia
Treatment
Prevention
Vaccines
Antibiotics
More Information
Staphylococcus aureus
Infections
Types of staph infections
Staph toxins
Risk factors for staph infections
Resistance to antibiotics
Methicillin-resistant
Staphylococcus aureus
(MRSA)
Symptoms
Diagnosis
Treatment
Prevention
Other Staphylococcal Infections
Streptococcal Infections
Types of streptococci
Spread of streptococcal infection
Symptoms
Complications of streptococcal infections
Diagnosis
Strep throat
Cellulitis and impetigo
Necrotizing fasciitis
Treatment
Strep throat
Other streptococcal infections
More Information
Toxic Shock Syndrome
Causes
Symptoms
Diagnosis
Treatment
Prevention
Bacterial Infections: Spirochetes
Relapsing Fever
Relapsing fever caused by ticks (tick-borne relapsing fever)
Relapsing fever caused by lice (louse-borne relapsing fever)
Symptoms
Diagnosis
Treatment
Prognosis
More Information
Rat-Bite Fever
Symptoms
Streptobacillary rat-bite fever
Spirillary rat-bite fever
Diagnosis
Treatment
Prognosis
More Information
Leptospirosis
Symptoms
Weil syndrome
Diagnosis
Treatment
Prevention
More Information
Bejel, Yaws, and Pinta
Symptoms
Bejel
Yaws
Pinta
Diagnosis
Treatment
Lyme Disease
Symptoms
Early localized–stage Lyme disease
Early disseminated–stage Lyme disease
Late-stage Lyme disease
Diagnosis
Treatment
Prevention
More Information
Chlamydial Infections and Mycoplasmas
Chlamydial Infections
Chlamydia trachomatis
Chlamydia pneumoniae
Chlamydia psittaci
More Information
Mycoplasmas
More Information
COVID-19
COVID-19
Transmission of COVID-19
Symptoms
Complications
Diagnosis
Treatment
Prevention
Vaccination
Masking and other routine measures
Measures for those exposed or infected
More Information
Enteroviruses
Hand-Foot-and-Mouth Disease
Symptoms
Diagnosis
Treatment
Prevention
Postpolio Syndrome
Treatment
Overview of Enterovirus Infections
Transmission
Symptoms
Diagnosis
Treatment
Diseases Caused by Enteroviruses
Aseptic meningitis
Encephalitis
Acute flaccid myelitis (AFM)
Epidemic pleurodynia (Bornholm disease)
Hemorrhagic conjunctivitis
Herpangina
Infection in the newborn
Myopericarditis
Polio
Symptoms
Minor poliovirus infections
Poliovirus aseptic meningitis without paralysis
Paralytic poliomyelitis
Diagnosis
Treatment
Prognosis
Prevention
More Information
Fungal Infections
Overview of Fungal Infections
Opportunistic fungal infections
Primary fungal infections
Diagnosis
Treatment
Aspergillosis
Symptoms
Chronic pulmonary aspergillosis
Sinus aspergillosis
Invasive aspergillosis
Diagnosis
Treatment
Blastomycosis
Symptoms
Diagnosis
Treatment
Candidiasis
Symptoms
Diagnosis
Treatment
Coccidioidomycosis
Risk factors for progressive coccidioidomycosis
Symptoms
Diagnosis
Treatment
Cryptococcosis
Symptoms
Diagnosis
Treatment
People without advanced HIV infection
People with advanced HIV infection
Histoplasmosis
Forms
Symptoms
Acute pulmonary histoplasmosis
Progressive disseminated histoplasmosis
Chronic cavitary histoplasmosis
Other forms of histoplasmosis
Diagnosis
Treatment
Prognosis
Mucormycosis
Symptoms
Diagnosis
Treatment
Prognosis
Paracoccidioidomycosis
Symptoms
Diagnosis
Treatment
Sporotrichosis
Symptoms
Diagnosis
Treatment
Herpesvirus Infections
Overview of Herpesvirus Infections
Treatment
Postherpetic Neuralgia
Symptoms
Diagnosis
Treatment
Genital Herpes
Symptoms
Diagnosis
Treatment
Antiviral medications
Other treatments
Prevention
Herpes Simplex Virus (HSV) Infections
Primary and recurrent (reactivated) infection
Symptoms and Complications
Oral infection
Other infections and complications
Diagnosis
Treatment
Antiviral medications
Other treatments
Prevention
Shingles
Symptoms and Complications
Diagnosis
Treatment
Prevention
Infectious Mononucleosis
Symptoms
Diagnosis
Treatment
Cytomegalovirus (CMV) Infection
Transmission of CMV
Symptoms
Diagnosis
Treatment
Chickenpox
Transmission of chickenpox
Symptoms
Complications
Diagnosis
Treatment
Prognosis
Prevention
Vaccination
Preventing spread of chickenpox
After exposure to chickenpox
Human Immunodeficiency Virus (HIV) Infection
Antiretroviral Treatment of Human Immunodeficiency Virus (HIV) Infection
Side effects of antiretroviral medications
Immune reconstitution inflammatory syndrome
Interactions with antiretroviral medications
Use of antiretroviral medications
Prevention of opportunistic infections
Other medications
More Information
Human Immunodeficiency Virus (HIV) Infection
Acquired immunodeficiency syndrome (AIDS)
Transmission of HIV Infection
Through sexual activity
Through needles or other instruments
From mother to child
Through blood transfusions or organ transplants
Artificial insemination
Mechanism of HIV Infection
CD4 count
Viral load
Symptoms
Initial infection
Interval of mild or no symptoms
More severe symptoms
Cancers common in people with HIV infection
Cause of death
Diagnosis
Screening and diagnostic tests
Monitoring
Diagnosis of AIDS (end-stage HIV infection)
Diagnosis of HIV-related conditions
Treatment
Immunization
Prognosis
End-of-life issues
Prevention
Universal precautions
Preventing transmission by blood transfusions and organ transplants
Preventing transmission from mother to newborn
Preventive treatment before exposure
Preventive treatment after exposure
More Information
Immunization
Mpox Vaccine
Vaccine Type
Dose and Recommendations
People who should receive this vaccine
People who should not receive this vaccine
Side Effects
More Information
Diphtheria-Tetanus-Pertussis Vaccine
Vaccine Type
Dose and Recommendations
People who should receive this vaccine
People who should not receive this vaccine
Side Effects
More Information
Haemophilus influenzae
Type b Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
Hepatitis A Vaccine
Vaccine Type
Dose and Recommendations
People who may get this vaccine
People who should not get this vaccine
Side Effects
More Information
Hepatitis B Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
Shingles Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
Human Papillomavirus (HPV) Vaccine
Vaccine Type
Dose and Recommendations
People who may get this vaccine
People who should not get this vaccine
Side Effects
More Information
Influenza Vaccine
Vaccine Type
Dose and Recommendations
People who may get this vaccine
People who should not get this vaccine
Side Effects
More Information
Measles, Mumps, and Rubella Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
Meningococcal Vaccine
Vaccine Type
Dose and Recommendations
People who may get this vaccine
People who should not get this vaccine
Side Effects
More Information
Pneumococcal Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
Polio Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
Rotavirus Vaccine
Vaccine Type
Dose and Recommendations
People who may get this vaccine
People who should not get this vaccine
Side Effects
More Information
Tetanus-Diphtheria Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
Varicella Vaccine
Vaccine Type
Dose and Recommendations
People who should get this vaccine
People who should not get this vaccine
Side Effects
More Information
COVID-19 Vaccine
Vaccine Types
Dose and Recommendations
Side Effects
More Information
Ebola Vaccine
Vaccine Type
Dose and Recommendations
People who should receive this vaccine
People who should not receive this vaccine
Side Effects
More Information
Overview of Immunization
Types of Immunization
Active immunization
Passive immunization
Vaccine Administration
Vaccination Restrictions and Precautions
Common Vaccinations in Children
Common Vaccinations in Adults
Vaccine Safety and Hesitancy
Vaccination Before Foreign Travel
More Information
Chikungunya Vaccine
Vaccine Type
Dose and Recommendations
People who should receive this vaccine
People who should not receive this vaccine
Side Effects
Respiratory Syncytial Virus (RSV) Vaccine
Vaccine Type
Dose and Recommendations
People who may get this vaccine
People who should not get this vaccine
Side Effects
More Information
Meningococcal Infections
Meningococcal Infections
Symptoms
Diagnosis
Treatment
Prognosis
Prevention
After exposure to meningitis
Vaccination
More Information
Parasitic Infections: Overview
Overview of Parasitic Infections
Transmission
Fecal-oral transmission of parasites
Skin transmission of parasites
Diagnosis
Identifying parasites in the intestinal tract
Treatment
Prevention
Preventing parasites acquired by mouth
Preventing parasites acquired through the skin
More Information
Parasitic Infections: Cestodes (Tapeworms)
Echinococcosis (Dog Tapeworm Infection)
Dog tapeworm life cycle
Symptoms
Diagnosis
Treatment
Prevention
Tapeworm Infection
Pork, beef, and fish tapeworm life cycle
Cysticercosis
Dwarf tapeworm life cycle
Symptoms
Diagnosis
Treatment
Cysticercosis treatment
Prevention
Parasitic Infections: Extraintestinal Protozoa
Introduction to Extraintestinal Protozoa
Introduction to Free-Living Amebas
African Sleeping Sickness
Transmission
Symptoms
Skin
Blood and lymph nodes
Brain and cerebrospinal fluid
Diagnosis
Treatment
Prevention
More Information
Primary Amebic Meningoencephalitis
Symptoms
Diagnosis
Treatment
More Information
Granulomatous Amebic Encephalitis
Symptoms
Diagnosis
Treatment
More Information
Amebic Keratitis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Chagas Disease
Transmission
Symptoms
First stage (acute stage)
Second stage (chronic indeterminate stage)
Third stage (chronic stage)
Diagnosis
Treatment
Prevention
More Information
Babesiosis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Leishmaniasis
Transmission
Cutaneous leishmaniasis
Mucosal leishmaniasis
Visceral leishmaniasis
Symptoms
Cutaneous leishmaniasis
Mucosal leishmaniasis
Visceral leishmaniasis
Diagnosis
Treatment
Cutaneous leishmaniasis
Mucosal leishmaniasis
Visceral leishmaniasis
Prevention
More Information
Malaria
Plasmodium
species that cause malaria
Transmission
Symptoms and Complications
Malaria caused by
Plasmodium falciparum
Malaria caused by other species of
Plasmodium
Symptoms in people taking medications to prevent malaria
Diagnosis
Treatment
Severe malaria
Malaria caused by
Plasmodium falciparum
Malaria caused by
Plasmodium vivax
or
Plasmodium ovale
Malaria caused by
Plasmodium malariae
or
Plasmodium knowlesi
Side effects of medications used for malaria
Prevention
Measures to prevent mosquito bites
Medications to prevent malaria
Vaccination
More Information
Toxoplasmosis
Transmission
Toxoplasmosis during pregnancy
Toxoplasmosis in people with a weakened immune system
Symptoms
Congenital toxoplasmosis
Symptoms in people with a weakened immune system
Diagnosis
Treatment
Prevention
More Information
Parasitic Infections: Intestinal Protozoa and Microsporidia
Cyclosporiasis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Cystoisosporiasis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Amebiasis
Transmission of amebiasis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Cryptosporidiosis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Giardiasis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Microsporidiosis
Symptoms
Diagnosis
Treatment
Parasitic Infections: Roundworms (Nematodes)
Dog Heartworm Infection
Transmission
Symptoms
Diagnosis
Treatment
Loiasis
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Lymphatic Filariasis
Transmission
Symptoms
Early (acute) infection
Chronic infection
Diagnosis
Treatment
Treatment of long-term problems
Prevention
Strongyloidiasis
Transmission
Autoinfection
Hyperinfection syndrome and disseminated strongyloidiasis
Symptoms
Hyperinfection syndrome and disseminated strongyloidiasis
Diagnosis
Treatment
Prevention
Overview of Filarial Worm Infections
Symptoms
Ascariasis
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Dracunculiasis
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Hookworm Infection
Other hookworm infections
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Onchocerciasis (River Blindness)
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Pinworm Infection
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Toxocariasis
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Trichinosis
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Whipworm Infection
Transmission
Symptoms
Diagnosis
Treatment
Prevention
Angiostrongyliasis
Transmission
Angiostrongylus cantonensis
Angiostrongylus costaricensis
Symptoms
Diagnosis
Treatment
Prevention
Parasitic Infections: Trematodes (Flukes)
Overview of Fluke Infections
Fluke Infections of the Intestines
Fluke Infections of the Liver
Symptoms
Diagnosis
Treatment
Prevention
Fluke Infections of the Lungs
Symptoms
Diagnosis
Treatment
Prevention
Schistosomiasis
Swimmer's itch
Symptoms
Diagnosis
Treatment
Prevention
Pox Viruses
Mpox (Monkeypox)
Symptoms
Diagnosis
Treatment
Prevention
More Information
Smallpox
Symptoms
Variola major
Variola minor
Diagnosis
Prevention
Treatment
More Information
Respiratory Viruses
Bird Flu
Symptoms
Diagnosis
Treatment
Prevention
Coronaviruses and Acute Respiratory Syndromes (MERS and SARS)
Middle East Respiratory Syndrome (MERS)
Diagnosis
Treatment
Severe Acute Respiratory Syndrome (SARS)
Symptoms
Diagnosis
Treatment
Common Cold
Symptoms
Diagnosis
Treatment
Prevention
Influenza (Flu)
Transmission of influenza
Influenza types and strains
Influenza epidemics and pandemics
Symptoms
Complications
Diagnosis
Treatment
Prevention
Vaccines for influenza
Antiviral medications
Rickettsial and Related Infections
Epidemic Typhus
Symptoms
Diagnosis
Treatment
Prevention
Brill-Zinsser Disease
Murine (Endemic) Typhus
Symptoms
Diagnosis
Treatment
Prevention
Rickettsialpox
Symptoms
Diagnosis
Treatment
Prevention
Scrub Typhus
Symptoms
Diagnosis
Treatment
Prevention
Q Fever
Symptoms
Diagnosis
Treatment
Q fever endocarditis
Prevention
Overview of Rickettsial Infections
Symptoms
Diagnosis
Testing
Treatment
Rocky Mountain Spotted Fever (RMSF)
Symptoms
Diagnosis
Treatment
Prevention
Ehrlichiosis and Anaplasmosis
Symptoms
Diagnosis
Treatment
Prevention
Other Spotted Fevers
Symptoms
Diagnosis
Treatment
Prevention
Sexually Transmitted Infections (STIs)
Mycoplasma
Infections
Symptoms
Complications of
Mycoplasma
infections
Diagnosis
Treatment
Sex partners
Prevention
More Information
Overview of Sexually Transmitted Infections (STIs)
Causes
Transmission
Symptoms
Complications of STIs
Diagnosis
Screening
Treatment
Prevention
More Information
Chancroid
Symptoms
Diagnosis
Treatment
Prevention
Chlamydia
Symptoms
Complications of chlamydia
Diagnosis
Screening
Treatment
Sex partners
Prevention
More Information
Human Papillomavirus (HPV) Infection
Symptoms
Diagnosis
Treatment
Prevention
More Information
Gonorrhea
Symptoms
Diagnosis
Screening
Treatment
Sex partners
Prevention
More Information
Granuloma Inguinale
Symptoms
Diagnosis
Treatment
Prevention
Lymphogranuloma Venereum (LGV)
Symptoms
Diagnosis
Treatment
Prevention
Syphilis
Transmission
Symptoms
Primary-stage syphilis
Secondary-stage syphilis
Latent-stage syphilis
Tertiary (late) syphilis
Other symptoms
Diagnosis
Treatment
Treatment of sex partners
Jarisch-Herxheimer reaction
After treatment
Prevention
More Information
Trichomoniasis
Symptoms
Diagnosis
Treatment
Prevention
More Information
Tuberculosis and Related Infections
Leprosy
Transmission
Classification of leprosy
Symptoms
Complications of leprosy
Leprosy reactions
Diagnosis
Treatment
Prevention
Miliary Tuberculosis (TB)
Symptoms
Diagnosis
Treatment
Infections Caused by Bacteria Related to Tuberculosis (TB)
Mycobacterium avium
Complex (MAC) Infections
MAC lung infections
MAC lymph node infections
Widespread MAC infections
Other Nontuberculous Mycobacteria Infections
Skin infections
Wound and foreign body infections
Tuberculosis (TB)
Tuberculosis worldwide
Tuberculosis in the United States
How Tuberculosis Develops
Primary TB infection
Latent TB infection
Active TB disease
Transmission of infection
Progression and spread of infection
Symptoms and Complications
Primary infection
Latent infection
Active pulmonary tuberculosis
Extrapulmonary tuberculosis
Diagnosis
Chest x-ray for tuberculosis
Sputum tests for tuberculosis
Skin test for tuberculosis
Blood test for tuberculosis
Other tests
Treatment
Isolation
Antibiotics
Drug resistance
Other treatments
Screening for and Treatment of Latent TB Infection
Prevention
Stopping the spread of tuberculosis
Treating tuberculosis early
Vaccination for tuberculosis
Urinary Tract Infections (UTIs)
Overview of Urinary Tract Infections (UTIs)
Causes
Bacteria
Viruses
Fungi
Parasites
Bladder Infection
Causes
Causes of bladder infection in women
Causes of bladder infection in men
Causes of bladder infection in both sexes
Symptoms
Diagnosis
Finding the cause of cystitis
Treatment
Prevention
Kidney Infection
Causes
Symptoms
Diagnosis
Treatment
Prognosis
Prevention
Asymptomatic Bacteriuria
Overview of Viral Infections
Overview of Viral Infections
Types of viral infections
Spread of viruses
Defenses against viruses
Viruses and cancer
Diagnosis
Treatment
Treatment of symptoms
Antiviral drugs
Prevention
General measures
Vaccines
Passive immunization
More Information
