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  1. <Quick Facts
    Quick Facts: Infections
    Bacterial Infections: Overview
    • Overview of Bacteria
      • What are bacteria?
      • What is a bacterial infection?
      • Do all bacteria make you sick?
      • How do you get a bacterial infection?
      • How does your body defend itself against bacteria?
      • How do doctors know you have a bacterial infection?
      • How do doctors treat a bacterial infection?
        • What is antibiotic resistance?
      • How can I prevent bacterial infection?
    Bacterial Infections: Anaerobic Bacteria
    • Clostridioides (formerly Clostridium) difficile-Induced Colitis (C. diff)
      • What is C. diff?
      • What causes C. diff?
      • What are the symptoms of C. diff?
      • How can doctors tell if I have C. diff?
      • How do doctors treat C. diff?
    • Tetanus
      • What is tetanus?
      • What causes tetanus?
      • What are the symptoms of tetanus?
      • How can doctors tell if I have tetanus?
      • How do doctors treat tetanus?
      • How can I prevent tetanus?
    COVID-19
    • COVID-19
      • What is COVID-19?
      • What causes COVID-19?
        • What is a coronavirus?
      • What are the symptoms of COVID-19?
        • Is COVID-19 fatal?
      • How can I tell if I have COVID-19?
      • How is COVID-19 treated?
      • How can I prevent COVID-19?
      • Quarantine and isolation
      • More Information
    Sexually Transmitted Infections (STIs)
    • Overview of Sexually Transmitted Infections
      • What are sexual transmitted infections (STIs)?
      • What causes STIs?
      • What are the symptoms of STIs?
      • How can doctors tell if I have an STI?
      • How can I prevent STIs?
        • Practice safe sex
        • Get vaccines (shots)
      • How do doctors treat STIs?
    • Chlamydia
      • What is chlamydia?
      • What are the symptoms of chlamydia?
        • Women
        • Men
        • Women and men
      • How can doctors tell if I have chlamydia?
      • How do doctors treat chlamydia?
    • Human Papillomavirus (HPV) Infection
      • What is HPV (human papillomavirus)?
      • How do I get an HPV infection?
      • What are genital warts?
      • What are the symptoms of genital warts?
      • How can doctors tell if I have genital warts?
      • How do doctors treat genital warts?
      • How can I prevent genital warts?
    • Gonorrhea
      • What is gonorrhea?
      • What are the symptoms of gonorrhea?
        • Women
        • Men
        • Women and men
      • How can doctors tell if I have gonorrhea?
      • How do doctors treat gonorrhea?
    • Syphilis
      • What is syphilis?
      • What are the 3 stages of syphilis?
      • What are the symptoms of syphilis?
        • Symptoms of stage 1 (primary) syphilis
        • Symptoms of stage 2 (secondary) syphilis
        • Symptoms of stage 3 (tertiary or late) syphilis
      • How can doctors tell if I have syphilis?
      • How do doctors treat syphilis?
    • Trichomoniasis
      • What is trichomoniasis?
      • What causes trichomoniasis?
      • What are the symptoms of trichomoniasis?
        • Women
        • Men
      • How can doctors tell if I have trichomoniasis?
        • Women
        • Men
      • How do doctors treat trichomoniasis?
    Immunization
    • Overview of Immunization
      • What does immunization mean?
      • What are vaccines?
      • Do vaccines work?
      • Are vaccines safe?
      • Who gets vaccines and when?
      • Where can I get more information about vaccines?
    Herpesvirus Infections
    • Overview of Herpesvirus Infections
      • What are herpesviruses?
      • What infections do herpesviruses cause?
      • How do doctors treat herpesvirus infections?
    • Chickenpox
      • What is chickenpox?
      • What causes chickenpox?
      • What are the symptoms of chickenpox?
      • How do doctors tell if I have chickenpox?
      • How do doctors treat chickenpox?
      • How can I prevent chickenpox?
    • Herpes Simplex Virus Infections
      • What are herpes simplex virus (HSV) infections?
      • What causes HSV infection?
      • What are the symptoms of HSV infection?
        • Oral herpes
        • Genital herpes
        • Herpes in other areas
      • How can doctors tell if I have HSV infection?
      • How do doctors treat HSV infection?
      • How can I prevent spreading oral or genital herpes?
    • Infectious Mononucleosis (Mono)
      • What is infectious mononucleosis?
      • What causes mono?
      • What are the symptoms of mono?
      • How can doctors tell if I have mono?
      • How do doctors treat mono?
    • Postherpetic Neuralgia
      • What is postherpetic neuralgia?
      • What causes postherpetic neuralgia?
      • What are the symptoms of postherpetic neuralgia?
      • How can doctors tell if I have postherpetic neuralgia?
      • How do doctors treat postherpetic neuralgia?
      • How can I prevent postherpetic neuralgia?
    • Shingles
      • What is shingles?
      • What causes shingles?
      • What are the symptoms of shingles?
      • How can doctors tell if I have shingles?
      • How do doctors treat shingles?
      • How can I prevent shingles?
    Human Immunodeficiency Virus (HIV) Infection
    • Human Immunodeficiency Virus (HIV) Infection
      • What is the human immunodeficiency virus (HIV)?
      • What is Late-Stage HIV?
      • What causes HIV infection?
      • What are the symptoms of HIV?
      • How can doctors tell if I have HIV?
      • How do doctors treat HIV?
      • How can I prevent HIV?
      • Where can I learn more about HIV?
    Bacteremia, Sepsis, and Septic Shock
    • Sepsis and Septic Shock
      • What are sepsis and septic shock?
      • What causes sepsis?
      • What are the symptoms of sepsis and septic shock?
        • Sepsis
        • Septic shock
      • How can doctors tell if I have sepsis?
      • How do doctors treat sepsis?
    Biology of Infectious Disease
    • Fever in Adults
      • What is a fever?
      • What causes fever in adults?
        • Fever of unknown origin
      • What are the symptoms of fever in adults?
      • When should I see a doctor about a fever?
      • How do doctors treat fever in adults?
    • Overview of Infectious Disease
      • What is an infection?
        • What are microorganisms?
        • Where do germs come from?
        • Do all germs make people sick?
      • How do people get infections?
      • How does my body defend against infections?
        • Who's at high risk of infection?
      • What are the symptoms of infection?
      • How do doctors tell if I have an infection?
      • How do doctors treat infection?
      • How can I prevent infections?
    Arboviruses, Arenaviruses, and Filoviruses
    • Zika Virus Infection
      • What is Zika virus infection?
      • How do people get Zika virus infection?
      • What are the symptoms of Zika virus infection?
      • How does Zika affect babies?
      • How do doctors tell if I have Zika virus infection?
      • How do doctors treat Zika virus infection?
      • How can I prevent Zika virus infection?
    • Dengue Fever
      • What is dengue?
      • What causes dengue?
      • What are the symptoms of dengue?
        • What is dengue hemorrhagic fever?
      • How can doctors tell if I have dengue?
      • How do doctors treat dengue?
      • How can I prevent dengue?
    • Ebola Virus and Marburg Virus Infections
      • What are Ebola and Marburg virus infections?
      • What causes Ebola and Marburg virus infection?
      • What are the symptoms of Ebola and Marburg viruses?
      • How can doctors tell if I have Ebola or Marburg viruses?
      • How do doctors treat Ebola and Marburg viruses?
      • How can I prevent Ebola and Marburg virus infection?
    • Hantavirus Infection
      • What is hantavirus?
      • What causes hantavirus infection?
      • What are the symptoms of hantavirus?
      • How can doctors tell if I have hantavirus?
      • How do doctors treat hantavirus?
    • Hemorrhagic Fevers Overview
      • What are hemorrhagic fevers?
      • What causes hemorrhagic fevers?
      • What are the symptoms of hemorrhagic fevers?
    • Yellow Fever
      • What is yellow fever?
      • What causes yellow fever?
      • What are the symptoms of yellow fever?
      • How can doctors tell if I have yellow fever?
      • How do doctors treat yellow fever?
      • How can I prevent yellow fever?
        • Avoid mosquito bites
        • Get the vaccine if you're going to an area with yellow fever
    Arbovirus: Rift Valley Fever
    • Rift Valley Fever
      • What do I need to know about Rift Valley fever?
      • How do people get Rift Valley fever?
      • How does Rift Valley fever affect people’s health?
      • How is Rift Valley fever treated?
      • How does Rift Valley fever affect animals' health?
      • Does Rift Valley fever cause a risk to food safety or supply?
      • How is a Rift Valley prevented in animals?
      • How can you protect yourself from Rift Valley fever?
      • Where can I learn more about Rift Valley fever?
    Overview of Viral Infections
    • Overview of Viral Infections
      • What is a viral infection?
      • How can doctors tell if I have a viral infection?
      • How do doctors treat viral infections?
      • How can I prevent viral infections?
    Tuberculosis and Leprosy
    • Tuberculosis (TB)
      • What is tuberculosis?
        • What are the stages of TB?
      • What causes TB?
        • Why does TB become active?
      • What are the symptoms of TB?
      • How do doctors tell if I have TB?
        • What are screening tests for TB?
      • How do doctors treat TB?
        • Active TB
        • Latent TB
        • What are resistant bacteria?
      • How do doctors prevent TB from spreading?
        • Is there a vaccine for TB?
    • Infections Caused by Bacteria Related to Tuberculosis (TB)
      • What is a MAC infection?
        • MAC infections of the lungs
        • MAC infections of the lymph nodes
        • MAC infection throughout the body
      • What other types of mycobacteria infection do people get?
    • Leprosy
      • What is leprosy?
      • What causes leprosy?
      • What are the symptoms of leprosy?
      • How do doctors tell if I have leprosy?
      • How do doctors treat leprosy?
      • How can I prevent leprosy?
    Parasitic Infections: Extraintestinal Protozoa
    • Malaria
      • What is malaria?
      • What causes malaria?
      • What are the symptoms of malaria?
      • How can doctors tell if I have malaria?
      • How do doctors treat malaria?
      • How can I prevent malaria?
    Parasitic Infections: Cestodes (Tapeworms)
    • Tapeworm Infection
      • What are tapeworms?
      • What causes tapeworm infection?
        • What kinds of animals can give me tapeworms?
      • What are the symptoms of tapeworm infection?
      • How do doctors tell I have tapeworm infection?
      • How do doctors treat tapeworm infection?
      • How can I prevent tapeworm infection?
    Parasitic Infections: Intestinal Protozoa and Microsporidia
    • Giardiasis
      • What is giardiasis?
      • What causes giardiasis?
      • What are the symptoms of giardiasis?
      • How can doctors tell if I have giardiasis?
      • How do doctors treat giardiasis?
      • How can I prevent giardiasis?
    Parasitic Infections: Nematodes (Roundworms)
    • Pinworm Infection
      • What is pinworm infection?
      • What causes pinworm infection?
      • What are the symptoms of pinworm infection?
      • How can doctors tell if I have pinworm infection?
      • How do doctors treat pinworm infection?
    Parasitic Infections: New World Screwworm
    • New World Screwworm
      • What do I need to know about New World screwworm?
      • What is the New World screwworm?
      • Where does the New World screwworm live?
      • How does New World screwworm affect people’s health?
      • How does New World screwworm affect animals' health?
      • How is New World screwworm infestation detected?
      • Does New World screwworm cause a risk to food safety or supply?
      • How is a New World screwworm outbreak controlled?
      • How can you protect yourself and your animals from New World screwworm?
      • Where can I learn more about New World screwworm?
    Parasitic Infections: Trematodes (Flukes)
    • Schistosomiasis
      • What is schistosomiasis?
      • What causes schistosomiasis?
      • What are the symptoms of schistosomiasis?
      • How can doctors tell if I have schistosomiasis?
      • How do doctors treat schistosomiasis?
      • How can I prevent schistosomiasis?
    Bacterial Infections: Gram-Negative Bacteria
    • Escherichia coli (E. coli) Infections
      • What is E. coli?
      • What causes E. coli infections?
        • E. coli O157:H7
      • What are the symptoms of E. coli infections?
      • How can doctors tell if I have an E. coli infection?
      • How do doctors treat E. coli infections?
      • How can I prevent E. coli infections?
    Bacterial Infections: Spirochetes
    • Lyme Disease
      • What is Lyme disease?
      • What causes Lyme disease?
      • What are the symptoms of Lyme disease?
      • How can doctors tell if I have Lyme disease?
      • How do doctors treat Lyme disease?
      • How can I prevent Lyme disease?
    Bacterial Infections: Gram-Positive Bacteria
    • Staphylococcus aureus Infections
      • What is Staphylococcus aureus?
        • What is MRSA?
      • What causes staph infections?
        • What are staph carriers?
      • What are the symptoms of staph infections?
      • How can doctors tell if I have a staph infection?
      • How do doctors treat staph infections?
      • How can I prevent staph infections?
    • Streptococcal Infections
      • What are streptococcal (strep) infections?
      • What causes strep infections?
      • What are the symptoms of strep infections?
        • What are the complications of strep infections?
      • How can doctors tell if I have a strep infection?
      • How do doctors treat strep infections?
    Respiratory Viruses
    • Common Cold
      • What is the common cold?
      • What causes a cold?
      • What are the symptoms of a cold?
      • How can doctors tell if I have a cold?
      • How are colds treated?
      • How can I prevent colds?
    • Influenza (Flu)
      • What is influenza?
      • What causes influenza?
      • What are the symptoms of flu?
      • How can doctors tell if I have the flu?
      • How do doctors treat the flu?
      • How can I prevent the flu?
    Enteroviruses
    • Polio
      • What is polio?
      • What causes polio?
      • What are the symptoms of polio?
      • How can doctors tell if I have polio?
      • How do doctors treat polio?
      • How can I prevent polio?
    Fungal Infections
    • Candidiasis
      • What is candidiasis?
      • What causes candidiasis?
      • What are the symptoms of candidiasis?
      • How can doctors tell if I have candidiasis?
      • How do doctors treat candidiasis?
    Pox Viruses
    • Mpox (Monkeypox)
      • What is mpox?
      • What are the symptoms of mpox?
      • How can doctors tell if I have mpox?
      • How do doctors treat mpox?
      • How can I prevent mpox?
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