From Cow
Astrovirus, electron microscopy

Astroviruses are a common viral agent in the small intestine of cattle. They are a single stranded RNA virus belonging to the family Astroviridae[1].

These viruses have been demonstrated in the feces of calves with scours and can produce diarrhea in calves experimentally. However, these agents have also been found in the feces of healthy calves[2].

The importance of these agents in the syndrome of neonatal diarrhea has yet to be determined despite their presence in cattle herds worldwide[3].


  1. Tse H et al (2011) Rediscovery and genomic characterization of bovine astroviruses. J Gen Virol 92(8):1888-1898
  2. Aroonprasert D et al (1989) Cultivation and partial characterization of bovine astrovirus. Vet Microbiol 19(2):113-125
  3. Moser LA & Schultz-Cherry S (2005) Pathogenesis of astrovirus infection. Viral Immunol 18(1):4-10