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Journal of Clinical Microbiology, March 2007, p. 972-978, Vol. 45, No. 3
0095-1137/07/$08.00+0 doi:10.1128/JCM.01696-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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
B. R. Gulati,1,
R. Deepa,2,
B. K. Singh,1 and
C. Durga Rao2*
National Research Centre on Equines, Sirsa Road, Hisar, Haryana, India,1
Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India2
Received 16 August 2006/
Returned for modification 29 October 2006/
Accepted 17 November 2006
Rotaviruses causing severe diarrhea in foals in two organized farms in northern India, during the period from 2003 to 2005, were characterized by electropherotyping, serotyping, and sequence analysis of the genes encoding the outer capsid proteins. Of 137 specimens, 47 (34.31%) were positive for rotavirus and exhibited at least five different electropherotypes (E), E1 to E5. Strains belonging to different electropherotypes exhibited either a different serotype/genotype specificity or a lack of reactivity to typing monoclonal antibodies (MAbs) used in this study. Strains belonging to E1, E2, and E5 exhibited genotype G10,P6[1], G3, and G1 specificities and accounted for 19.0, 42.9, and 9.5% of the isolates, respectively. Though they possessed G10-type VP7, the E1 strains exhibited high reactivity with the G6-specific MAb, suggesting that the uncommon combination of the outer capsid proteins altered the specificity of the conformation-dependent antigenic epitopes on VP7. E3 and E4 strains accounted for 28.6% of the isolates and were untypeable. Sequence analysis of VP7 from E4 strains (Erv92 and Erv99) revealed that they represent a new VP7 genotype, G16. The detection of unexpected bovine rotavirus-derived G10,P6[1] reassortants, G1 serotype strains, and a new genotype (G16) strain in two distant farms reveals an interesting epidemiological situation and diversity of equine rotaviruses in India.
* Corresponding author. Mailing address: Department of Microbiology & Cell Biology, Indian Institute of Science, Bangalore 560012, India. Phone: 91-80-23602149. Fax: 91-80-23602697. E-mail:
cdr{at}mcbl.iisc.ernet.in.
Published ahead of print on 29 November 2006.
These authors contributed equally to this work.
Journal of Clinical Microbiology, March 2007, p. 972-978, Vol. 45, No. 3
0095-1137/07/$08.00+0 doi:10.1128/JCM.01696-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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