| Agent | Disease |
| Bacteria | | Vibrio cholerae O139 | Diarrhea | Aeromonas spp. | Gastroenteritis | Escherichia coli EHEC | Diarrhea | Yersinia enterocolitica | Gastrointestinal infections | Campylobacter jejuni | Dysentery, high fever, diarrhea | Pseudomonas aeruginosa | Wound infections with bad healing, otitis, gastroenteritis | Leptospira spp. | Meningitis, jaundice, renal failure | Mycobacterium spp. | Lesions | Cyanobacteria | Neurotoxication |
| Fungi | | Aspergillus spp. | Nosocomial aspergillosis |
| Virus | | Dengue virus | Dengue fever, transmitted by Aedes mosquitoes | Parvoviruses | Gastroenteritis | Hepatitis E virus | Jaundice, fatigue, fever, diarrhea | Astrovirus, Calicivirus, Parvovirus | Diarrhea, nausea, fever | SARS | Fever, lethargy, cough | TT virus (Circoviruses) | Hepatitis | Coxsackie B virus | Myocarditis | Rotavirus | Viral gastroenteritis |
| Protozoa | | Isospora belli | Isosporiasis, diarrhea, abdominal craps | Toxoplasma gondii | Toxoplasmosis, fever, muscle pain, flu-like syndromes | Blastocystis hominis | Blastocystosis, diarrhea, nausea, abdominal craps | Balantidium coli | Balantidiasis, diarrhea, perforation of the colon | Microsporidia spp. | Diarrhea | Cyclospora cayetanensis | Nausea, fever, vomiting | Naegleria fowleri | Headache, fever, nausea, pharyngitis |
| Parasites | | Heterophyes heterophyes | Inflammatory reaction, intestinal pain | Anisakis simplex | Intestinal pain, nausea, diarrhea | Gnathostoma spp. | Fever, vomiting, anorexia | Angiostrongylus cantonensis | Abdominal pain, nausea, vomiting, meningitis | Clonorchis sinensis | Inflammation of the biliary tract, bile adduct carcinoma | Metagonimus yokogawi | Abdominal pain, diarrhea |
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