Description of a New Clade within Subtype 1 of<i>Betaarterivirus suid 1</i>Causing Severe Outbreaks in Spain

Abstract

This report describes 28 genome sequences from a new clade within subtype 1 of <i>Betaarterivirus suid 1</i>, formerly known as porcine reproductive and respiratory syndrome virus 1. All share a potential recombinant pattern, with a highly pathogenic Italian strain as the putative major parental sequence and three other possible parents.