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Common Pathogens
| pathogen | disease and transmission |
|---|---|
| adenovirus | pharyngitis, droplet, direct contact |
| Epstein-Barr | mononucleosis, contact with saliva |
| hepatitis A | Hepatitis A, fecal-oral |
| hepatitis B | Hepatitis B, bloodborne, sexual |
| hepatitis C | Hepatitis C, bloodborne |
| herpes simplex | cold sores, genital herpes, contact with blister fluid, sexual |
| human immunodeficiency virus | AIDS, bloodborne, sexual |
| human papillomavirus | genital warts, sexual |
| influenza | flu, airborne, droplet |
| measles | measles, airborne, droplet |
| molluscipoxvirus | molluscum contagiosum warts, contact |
| mumps | parotitis, airborne, droplet |
| parovirus | fifth disease, droplet, bloodborne |
| rabies | rabies, vector (infected animals) |
| rhinoviruses | common cold, droplet, contact, fomites |
| rotavirus | rotavirus diarrhea, fecal-oral |
| rubella | German measles, airborne, droplet |
| varicella-zoster | chickenpox, shingles, airborne, droplet, contact with blister fluid |
| Variola major | smallpox, contact, fomites |
| Ascaris lumbricoides | roundworm, contact with contaminated soil |
| Cimex parasites | bedbugs, contact with infested bedding or furniture |
| Diphyllobothrium latum | tapeworms, foodborne (raw, infected fish) |
| Enterobius vermicularis | pinworms, fecal-oral |
| Pediculus humanis capitis | head lice, contact with infested hair |
| Phthirus pubis | pubic lice (crabs), contact with infested pubic hair |
| Sarcopetes scabei | scabies, contact |
| Aspergillus fumigatus | aspergillosis, airborne |
| Candida albicans | candidiasis (thrush, vaginal yeast infection), overgrowth of natural flora, sometimes sexually |
| Cryptococcus neoformans | cryptococcosis, contact with poultry droppings |
| Trichophyton rubrum, Trichophyton tonsurans (dermatophytes) | ringworm, contact |
| Histoplasma capsulatum | histoplasmosis, airborne |
| Pneumocystis jirovecii, Pneumocystis carnii | Pneumocystis pneumonia, airborne |
| Entamoeba histolytica | amebiais, fecal-oral |
| Giardia intestinalis (Giardia lamblia) | giardiasis, fecal-oral |
| Plasmodium parasites | malaria |
| Toxoplasma gondii | toxoplasmosis, foodborne, vector(animal), transplacental |
| Trichinella spiralis | trichinosis, foodborne (undercooked pork) |
| Trichomonas vaginalis | trichomoniasis, sexual |
| Bacillus anthracis | anthrax, vector, handling or eating undercooked meat from infected animals, spore inhalation |
| Bordetella pertussis | whooping cough, airborne |
| Borrelia burgdorferi | Lyme disease |
| Campylobacter jejuni | food poisoning, contaminated food and fluids |
| Chlamydia trachomatis | chlamydia, sexual |
| Clostridium botulinum | botulism, foodborne |
| Clostridium difficile | colitis, fecal-oral |
| Clostridium perfringens | gas gangrene, contact (wounds) |
| Clostridium tetani | tetanus, contact through a deep cut |
| Corynebacterium diphtheriae | diphtheria, droplet |
| Escherichia coli | diarrhea, foodborne |
| Group B streptococcus | meningitis, droplet |
| Haemophilus influenzae | pneumonia, epiglottitis, meningitis, droplet |
| Helicobacter pylori | peptic ulcer disease, fecal-oral, oral-anal |
| Legionella pneumophila | Legionnaires' disease, water aerosol |
| Listeria monocytogenes | meningitis, droplet |
| Mycobacterium leprae | leprosy, airborne, droplet |
| Mycobacterium tuberculosis | tuberculosis, airborne, droplet |
| Mycoplasma pneumoniae | pneumonia, droplet |
| Neisseria gonorrhoeae | gonorrhea, sexual |
| Neisseria meningitidis | meningitis, droplet |
| Pseudomonas aeruginosa | "hot tub rash", contaminated water |
| Rickettsia prowazekii | typhus, vector (tick) |
| Rickettsia rickettsii | Rocky Mountain spotted fever, vector (tick) |
| Shigella sonnei | shigellosis, fecal-oral |
| Staphylococcus aureus | boils, septicemia, pneumonia, contact |
| Streptococcus pneumoniae | pneumonia, airborne, droplet, contact |
| Streptococcus pyogenes | strep throat, rheumatic fever, septicemia, droplet |
| Treponema pallidum | syphilis, sexual |
| Vibrio cholerae | cholera, fecal-oral, contaminated water |
| Yersinia pestis | plague, vector (fleas, rodents) |