| | Agent | Disease |
| | Bacteria | | | Vibrio cholerae | Cholera, diarrhea, cramps | | Vibrio vulnificus, V. alginolyticus, V. parahaemolyticus | Diarrhea, nausea, cramps | | Escherichia coli STEC etc. | Diarrhea, feces with blood, vomiting (shigellosis) | | Salmonella typhi | Fever, diarrhea, delirium | | Chlostridium botulinum | Botulism, respiratory failure | | Legionella pneumophila | Pontiac fever, Legionares’ disease, pneumonia | | Leptospira spp. | Meningitis, jaundice, renal failure, head ache | | Wolbachia pipientis | River blindness when released from Onchocerca volvulus |
| | Virus | | | Adenovirus | Pneumonia, croup, bronchitis | | Hepatitis A virus | Jaundice, fatigue, fever, diarrhea | | Poliovirus | Poliomyelitis, headache, fever, spastic paralysis | | Polyomavirus | Respiratory infection, leukoencephalopathy | | Norovirus | Vomiting, nausea, cramps |
| | Protozoa | | | Entamoeba histolytica | Diarrhea, fatigue, fever | | Cryptosporidium parvum | Flu-like symptoms, diarrhea, nausea | | Giardia lamblia | Diarrhea |
| | Parasites | | | Plasmodium spp. | Malaria, transmitted by Anopheles mosquitoes | | Schistosoma spp. | Bilharziasis, itching, fever, cough | | Dracunculus medinensis | Nausea, diarrhea, allergic reaction | | Taenia spp. | Cysticercosis, loss of weight | | Fasciolopsis buski | Diarrhea, liver enlargement, cholangitis, jaundice | | Hymenolepis nana | Abdominal pain, nervous manifestation | | Echinococcus granulosus | Liver enlargement, jaundice | | Ascaris lumbricoides | Inflammation, fever, diarrhea, nausea | | Enterobius vermicularis | Itching, hyperactivity, insomnia | | Onchocerca volvulus | River blindness, itching, blindness |
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