| | 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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