Table 2.

Virus families associated with gastroenteritis in humans

Common name	Adenovirus	Astrovirus	Norovirus	Rotavirus	SARS	Nipah	Influenza	Hepatitis A	Hepatitis E
Family	Adeno-viridae	Astro-viridae	Calici-viridae	Reo-viridae	Corona-viridae	Paramyxo-viridae	Paramyxo-viridae	Picorna-viridae	Calici-viridae
Dimensions (nm)	80–110	27–30	27–32	60–80	120–160	150–300	150–300	27–30	35–40
Nucleic acid	dsDNA	ssRNA	ssRNA	dsRNA	ssRNA	neg ssRNA	neg ssRNA	ssRNA	ssRNA
Envelope	No	No	No	No	Yes	Yes	Yes	No	No
Virus associated with gastroenteritis in humans	Adenoviridae 40 and 41	Astroviruses	Norovirus (NoV, SRSV, NLVs), Sapovirus	especially RVA (RVB, RVC)	SARS-CoV	Nipah	Influenza (H5N1)	HAV	HEV