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Analysis of serotypes and electropherotypes of equine rotaviruses isolated in the United States.

Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station 77843-4467.

ABSTRACT

Equine group A rotaviruses isolated over a 10-year period in New York State, New Jersey, Kentucky, and Texas were compared serotypically and electropherotypically. All isolates were determined to be serotype 3 by reaction with hyperimmune antiserum to the serotype 3 H-2 strain of equine rotavirus. All displayed RNA electrophoretic migration patterns related to that of the H-2 strain but distinct from that of serotype 5 strain H-1. A serologic survey of 184 mares in Kentucky, which was done to determine the incidence of H-1 and H-2 infections, showed geometric mean serum neutralizing titers to the H-2 strain of equine rotavirus to be significantly higher than those to the H-1 strain. These data suggest that the serotype 3 H-2 strain is the dominant equine rotavirus in Kentucky and perhaps elsewhere in the United States. We were unable to produce confirmational evidence that the H-1 strain occurs as a natural infection in the United States.

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• Gulati, B. R., Deepa, R., Singh, B. K., Rao, C. D. (2007). Diversity in Indian Equine Rotaviruses: Identification of Genotype G10,P6[1] and G1 Strains and a New VP7 Genotype (G16) Strain in Specimens from Diarrheic Foals in India. J. Clin. Microbiol. 45: 972-978 [Abstract] [Full Text]