PMID- 37056231 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230415 IS - 2297-1769 (Print) IS - 2297-1769 (Electronic) IS - 2297-1769 (Linking) VI - 10 DP - 2023 TI - A recombinant porcine reproductive and respiratory syndrome virus type 2 field strain derived from two PRRSV-2-modified live virus vaccines. PG - 1149293 LID - 10.3389/fvets.2023.1149293 [doi] LID - 1149293 AB - A porcine reproductive and respiratory syndrome virus (PRRSV) type 2 (PRRSV-2) isolate was obtained from lung samples collected from a 4.5-month-old pig at a wean-to-finish site in Indiana, USA, although no gross or microscopic lesions suggestive of PRRSV infection were observed in the lung tissue. Phylogenetic and molecular evolutionary analyses based on the obtained virus sequences indicated that PRRSV USA/IN105404/2021 was a natural recombinant isolate from Ingelvac PRRS((R)) MLV and Prevacent((R)) PRRS, which are PRRSV-2-modified live virus vaccines commercially available in the United States. This study is the first to report the detection of a PRRSV-2 recombinant strain consisting entirely of two modified live virus vaccine strains under field conditions. Based on clinical data and the absence of lung lesions, this PRRSV-2 recombinant strain was not virulent in swine, although its pathogenicity needs to be confirmed by clinical trials. CI - Copyright (c) 2023 Trevisan, Magstadt, Woods, Sparks, Zeller, Li, Krueger, Saxena, Zhang and Gauger. FAU - Trevisan, Giovani AU - Trevisan G AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. FAU - Magstadt, Drew AU - Magstadt D AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. FAU - Woods, Amy AU - Woods A AD - AMVC, Frankfort, IN, United States. FAU - Sparks, Joel AU - Sparks J AD - AMVC, Frankfort, IN, United States. FAU - Zeller, Michael AU - Zeller M AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. AD - Programme in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore. FAU - Li, Ganwu AU - Li G AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. FAU - Krueger, Karen M AU - Krueger KM AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. FAU - Saxena, Anugrah AU - Saxena A AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. FAU - Zhang, Jianqiang AU - Zhang J AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. FAU - Gauger, Phillip C AU - Gauger PC AD - Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States. LA - eng PT - Journal Article DEP - 20230328 PL - Switzerland TA - Front Vet Sci JT - Frontiers in veterinary science JID - 101666658 PMC - PMC10086154 OTO - NOTNLM OT - MLV vaccines OT - NGS OT - PRRSV OT - evolution OT - recombination COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/04/15 06:00 MHDA- 2023/04/15 06:01 PMCR- 2023/01/01 CRDT- 2023/04/14 02:23 PHST- 2023/01/21 00:00 [received] PHST- 2023/02/27 00:00 [accepted] PHST- 2023/04/15 06:01 [medline] PHST- 2023/04/14 02:23 [entrez] PHST- 2023/04/15 06:00 [pubmed] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.3389/fvets.2023.1149293 [doi] PST - epublish SO - Front Vet Sci. 2023 Mar 28;10:1149293. doi: 10.3389/fvets.2023.1149293. eCollection 2023.