Phylogenetic analysis of novel posaviruses detected in feces of Japanese pigs with posaviruses and posa-like viruses of vertebrates and invertebrates

Hiroshi Aoki, Fujiko Sunaga, Hideharu Ochiai, Tsuneyuki Masuda, Mika Ito, Masataka Akagami, Yuki Naoi, Kaori Sano, Yukie Katayama, Tsutomu Omatsu, Mami Oba, Shoichi Sakaguchi, Tetsuya Furuya, Yoshinao Ouchi, Junsuke Shirai, Tetsuya Mizutani, Tomoichiro Oka, Makoto Nagai

Posaviruses and posa-like viruses are unclassified viruses with sequence similarity to viruses of the order Picornavirales. They have been reported in various vertebrates and invertebrates. We identified 11 posavirus-like sequences in porcine feces and performed phylogenic analysis. Previously reported Japanese posaviruses and those identified in this study clustered with posavirus 1, 4, and 7 and husavirus 1, while five viruses branched into three independent lineages, tentatively named posavirus 10, 11, and 12. Interestingly, posaviruses, except for posavirus 8 and 9, husaviruses, and rasaviruses, formed a cluster consisting of viruses only from pigs, humans, and rats, while posavirus 8 and 9, fisavirus, and basaviruses clustered with posa-like viruses from invertebrates.

Arch Virol.