Novel recombinant porcine enterovirus G viruses lacking structural proteins are maintained in pig farms in Japan

Type 1 recombinant enterovirus G (EV-G), which carries the papain-like cysteine protease (PLCP) gene of torovirus between its 2C/3A regions, and type 2 recombinant EV-G, which carries the torovirus PLCP gene with its flanking regions having non-EV-G sequences in place of the viral structural genes,...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of Veterinary Medical Science Vol. 85; no. 2; pp. 252 - 265
Main Authors:	IMAI, Ryo, RONGDUO, Wen, KAIXIN, Li, BORJIGIN, Sumiya, MATSUMURA, Hirofumi, MASUDA, Tsuneyuki, OZAWA, Takuji, OBA, Mami, MAKINO, Shinji, NAGAI, Makoto, MIZUTANI, Tetsuya
Format:	Journal Article
Language:	English
Published:	Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 2023 Japan Science and Technology Agency The Japanese Society of Veterinary Science
Subjects:	Animals baculoviral inhibitor of apoptosis (IAP) repeat Bats Cysteine proteinase Enterovirus Infections - veterinary Enteroviruses Enteroviruses, Porcine - genetics Farms Feces Female Genome, Viral Genomes genomic recombination Hogs Japan Metagenomics Neonates Papain papain-like cysteine protease Phylogeny porcine enterovirus G porcine toro virus Recombination, Genetic Structural proteins Swine Swine Diseases Virology Weaning Japan genomic recombination baculoviral inhibitor of apoptosis (IAP) repeat porcine enterovirus G papain-like cysteine protease porcine toro virus
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Type 1 recombinant enterovirus G (EV-G), which carries the papain-like cysteine protease (PLCP) gene of torovirus between its 2C/3A regions, and type 2 recombinant EV-G, which carries the torovirus PLCP gene with its flanking regions having non-EV-G sequences in place of the viral structural genes, have been detected in pig farms in several countries. In a previous study, we collected 222 fecal samples from 77 pig farms from 2104 to 2016 and detected one type 2 recombinant EV-G genome by metagenomics sequencing. In this study, we reanalyzed the metagenomic data and detected 11 type 2 recombinant EV-G genomes. In addition, we discovered new type 2 recombinant EV-G genomes of the two strains from two pig farms samples in 2018 and 2019. Thus, we identified the genomes of 13 novel type 2 recombinant EV-Gs isolated from several pig farms in Japan. Type 2 recombinant EV-G has previously been detected only in neonatal piglets. The present findings suggest that type 2 recombinant EV-G replicates in weaning piglets and sows. The detection of type 1 recombinant EV-Gs and type 2 recombinant EV-Gs at 3-year and 2-year intervals, respectively, from the same pig farm suggests that the viruses were persistently infecting or circulating in these farms.
ISSN:	0916-7250 1347-7439
DOI:	10.1292/jvms.22-0505