Table 1.

Agents of acute gastroenteritis (AGE)

Agent of age	Examples
Parasites	Protozoa;
	Giardia lamblia, Cryptosporidium parvum, Entamoeba histolytica
	Helminths (worms);
	Ascaris lumbricoides (Ascariasis), Ancylostoma duodenale (hookworm), Necator americanus (hookworm), Strongyloides stercoralis (Strongyloidiasis), Taenia saginata (tapeworm), Enterobius vermicularis (pinworm), Trichuris trichiura (whipworm), Fasciola hepatica (fluke)
Bacteria	Escherichia coli, Salmonella enteriditis serovars, Campylobacter spp., Vibrio cholerae, Shigella spp., Clostridium perfringens, Bacillus cereus, Vibrio parahaemolyticus, Yersinia enterocolitica
Viruses	Noroviruses (NoV, SRSV, NLVs), Rotavirus (RV) in particular rotavirus A (RVA), Hepatitis A virus (HAV), Hepatitis E virus (HAE), Adenovirus, Astroviruses, Coronaviruses (including Severe acute respiratory syndrome or SARS-Cov), Nipah virus (NiV) and H5N1 avian influenza viruses. Many other virus families associated with enteritis including the Picornaviridae (enterovirus, HAV, parechovirus and others), reoviridae (rotavirus), Astroviridae, Picobirnavirus