Article
Genetic variation and geographic distribution of porcine reproductive and respiratory syndrome virus in Japan.
Archives of virology - 1 Nov 2005
Yoshii M, Kaku Y, Murakami Y, Shimizu M, Kato K, Ikeda H
Abstract excerpt
Porcine reproductive and respiratory syndrome virus (PRRSV) has two genotypes, the North American-type (NA-type) and the European-type (EU-type), and each genotype is also genetically diverged. We sequenced the ORF5 gene of 30 PRRSVs isolated from 23 prefectures of Japan during 1992 and 1993 and during 2000 and 2001. All of the isolates were of the NA-type. Phylogenetic analysis of the overall NA-type viruses...
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