Abstract
Seneca Valley virus (SVV) is an emerging global picornavirus that causes porcine idiopathic vesicular disease. We characterized the genome and conducted evolutionary and recombination analyses of four newly identified SVV strains which were CH-GDZS-2019, CH-GDMZ-2019, CH-GDHZ01-2019, and CH-GDHZ02-2019. Sequence alignment and phylogenetic analysis showed that strains circulating in swine herds in China were genetically diverse and complex. Recombination analyses indicated that strain CH-GDZS-2019 was derived from strains USA-IA44662-2015-P1 and USA-GBI29-2015, which were both isolated in the USA in 2015, while CH-GDMZ-2019 was derived from the Chinese field strains 1-2018-BH-China and CH-GDQC-2017. Our results provided important insights into the molecular characterization of the SVV strains co-circulating in Guangdong Province in China in 2019 and demonstrated the importance of additional SVV surveillance in China.
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