Porcine respiratory and reproductive syndrome (PRRS) caused by Betaarterivirus suid leads to severe economic losses. The emergence of highly pathogenic Betaarterivirus suid 2 (PRRSV-II), such as NADC30 and NADC34, has been reported in the USA and several Asian countries...
This report describes 28 genome sequences from a new clade within subtype 1 of Betaarterivirus suid 1, 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 ...