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. 1987 Feb;25(2):290–294. doi: 10.1128/jcm.25.2.290-294.1987

Analysis by plaque reduction neutralization assay of intertypic rotaviruses suggests that gene reassortment occurs in vivo.

Y Hoshino, M M Sereno, K Midthun, J Flores, R M Chanock, A Z Kapikian
PMCID: PMC265885  PMID: 2434522

Abstract

The SB-1A rotavirus recovered from a diarrheic piglet in the United States is a naturally occurring intertypic rotavirus. When studied by reciprocal neutralization tests, the SB-1A virus was similar, if not identical, to the porcine Gottfried virus (serotype 4) and the porcine OSU virus (serotype 5). Analysis of reassortant viruses prepared from the SB-1A virus and the serotype 2 human DS-1 virus revealed that the antigenic specificity of the outer capsid protein VP3 of SB-1A was shared with the OSU virus, while the antigenic specificity of another outer capsid protein, VP7, of SB-1A appeared to be shared with the Gottfried virus. This suggests that SB-1A is a naturally occurring reassortant rotavirus between OSU-like and Gottfried-like porcine rotaviruses. In addition, using a genetic approach, we found evidence that the fourth gene was responsible for the predominantly one-way cross-neutralizing reactivity between canine rotavirus strain CU-1 (serotype 3) and porcine rotavirus strains SB-1A (serotypes 4 and 5) and OSU (serotype 5). Assignment of hemagglutination function to the fourth genome segment of porcine rotaviruses SB-1A and OSU and canine rotavirus CU-1 confirmed a similar previous gene assignment established for certain rotaviruses. Analysis of single gene 4 substitution reassortants confirmed our previous finding that VP3 was as potent in stimulating neutralizing antibodies as VP7. The observations confirm the need for a binary system of rotavirus classification and nomenclature similar to that used for the influenza A viruses; in such a system the neutralization specificity of both VP3 and VP7 would be indicated.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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