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Journal of Clinical Microbiology, September 2003, p. 4400-4403, Vol. 41, No. 9
0095-1137/03/$08.00+0     DOI: 10.1128/JCM.41.9.4400-4403.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Unexpected Detection of Animal VP7 Genes among Common Rotavirus Strains Isolated from Children in Mexico

A. R. Laird,1 V. Ibarra,2 G. Ruiz-Palacios,2 M. L. Guerrero,2 R. I. Glass,1 and J. R. Gentsch1*

Viral Gastroenteritis Section, Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, Atlanta, Georgia 30333,1 Department of Infectious Diseases, Instituto Nacional de la Nutrición, Mexico City 14000, Mexico2

Received 8 April 2003/ Returned for modification 11 June 2003/ Accepted 3 July 2003

In the course of characterizing 103 rotaviruses from children in Mexico, we found that the majority of strains were globally common types (55.4% of total), while uncommon types represented 5.7%, mixed infections with common types represented 14.8%, and partially or fully nontypeable isolates represented about 24%. Serotype G9 was detected for the first time in Mexico. We sequenced a subset of strains that were G nontypeable by reverse transcriptase PCR and found surprisingly that two strains having common human rotavirus P genotypes (8 and 6) had serotype G3 and G4 VP7 gene sequences that shared closer homology with canine and porcine strains, respectively, than with human strains, suggesting that these isolates represented reassortants between human and animal rotaviruses.

* Corresponding author. Mailing address: Viral Gastroenteritis Section (MS G04), NCID/CDC, 1600 Clifton Rd., Atlanta, GA 30333. Phone: (404) 639-3577. Fax: (404) 639-3645. E-mail: JGentsch{at}cdc.gov.

Journal of Clinical Microbiology, September 2003, p. 4400-4403, Vol. 41, No. 9
0095-1137/03/$08.00+0     DOI: 10.1128/JCM.41.9.4400-4403.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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