Molecular analysis of parapoxvirus envelope genes was performed. Parapoxvirus DNA was
detected in eight calves from eight farms in Iwate Prefecture, Japan, between April and
September 2010. Seven of the detected viruses were identified as bovine papular stomatitis
virus (BPSV) by sequencing, because their nucleotide identity was more than 96.8% similar
compared with BPSV strain V660. Among them, two formed a subgroup, because their amplicons
were digested with Xmn I (a marker for BPSV) and Hinc II
and exhibited a T61C nucleotide substitution in the sequenced region. The remaining virus
was pseudocowpox virus that had not been reported previously in Japan. Our results
demonstrate the presence of a new BPSV variant in Japan with genetic variability in the
envelope gene.
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