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Journal of Clinical Microbiology, September 2004, p. 4338-4343, Vol. 42, No. 9
0095-1137/04/$08.00+0 DOI: 10.1128/JCM.42.9.4338-4343.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.
Regional Laboratory of Virology, Baranya County Institute of State Public Health Service,1 Department of Medical Microbiology and Immunology,3 Department of Medical Genetics and Child Development, Faculty of Medicine, University of Pécs, Pécs, Hungary,4 Department of Animal Health and Well-Being, University of Bari, Bari, Italy2
Received 18 February 2004/ Returned for modification 10 May 2004/ Accepted 27 May 2004
Although rotavirus genotype P[6] is one of the three most common VP4 specificities associated with human infection, the relatively few sequence data available in public databases suggest that the genetic variability within P[6] might be presently unexplored. Thus far, two human P[6] lineages (M37-like and AU19-like) and a single porcine P[6] lineage (Gottfried-like) have been identified by phylogenetic analysis. Serologic studies demonstrated that these three lineages are antigenically distinct from each other, a finding based on which they were classified into three subtypes, P2A[6] (M37-like), P2B[6] (Gottfried-like), and P2C[6] (AU19-like). To study heterogeneity within this genotype, we selected for molecular characterization a total of six P[6] strains detected during an ongoing surveillance in Hungary. The variable region of the VP4 gene was subjected to sequencing and phylogenetic analysis. Our data indicated that these six strains fell into two phylogenetic lineages distinguishable from the human lineages M37-like and AU19-like and from the porcine lineage Gottfried-like. Further studies are needed to understand whether these two novel lineages are genuine human strains or might have originated from animal strains and to evaluate the antigenic relationship of the novel Hungarian P[6] strains to the three established subtypes.
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