| 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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