PMID- 29472439 OWN - NLM STAT- MEDLINE DCOM- 20180502 LR - 20180502 IS - 2042-7670 (Electronic) IS - 0042-4900 (Linking) VI - 182 IP - 17 DP - 2018 Apr 28 TI - Commercial porcine reproductive and respiratory syndrome virus (PRRSV)-2 modified live virus vaccine against heterologous single and dual Korean PRRSV-1 and PRRSV-2 challenge. PG - 485 LID - 10.1136/vr.104397 [doi] AB - This study evaluated porcine reproductive and respiratory syndrome virus (PRRSV)-2 modified live virus (MLV) vaccine against heterologous single and dual challenge of Korean PRRSV-1 and PRRSV-2. Pigs were administered PRRSV-2 MLV vaccine intramuscularly at 21 days of age and inoculated intranasally with both genotypes at 56 days of age. Vaccination of pigs with PRRSV-2 MLV vaccine resulted in reduction of viral loads of both PRRSV-1 and PRRSV-2 after heterologous single and dual challenge with PRRSV-1 and PRRSV-2. In addition, pigs vaccinated with PRRSV-2 MLV vaccine exhibited higher frequencies of PRRSV-1 and PRRSV-2 specific interferon-gamma secreting cells (IFN-gamma-SC) and showed a significant reduction in lung lesions and PRRSV nucleic acid within the lung lesions after single and dual challenge compared with unvaccinated challenged pigs. Taken together these results demonstrated that vaccination of pigs with PRRSV-2 is efficacious in protecting growing pigs from respiratory disease against heterologous single and dual PRRSV-1 and PRRSV-2 challenge. CI - (c) British Veterinary Association (unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted. FAU - Jeong, Jiwoon AU - Jeong J AD - Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea. FAU - Kim, Seeun AU - Kim S AD - Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea. FAU - Park, Changhoon AU - Park C AD - Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea. FAU - Park, Kee Hwan AU - Park KH AD - Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea. FAU - Kang, Ikjae AU - Kang I AD - Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea. FAU - Park, Su-Jin AU - Park SJ AD - Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea. FAU - Chae, Chanhee AU - Chae C AD - Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea. LA - eng PT - Journal Article DEP - 20180222 PL - England TA - Vet Rec JT - The Veterinary record JID - 0031164 RN - 0 (Vaccines, Attenuated) RN - 0 (Viral Vaccines) SB - IM MH - Administration, Intranasal MH - Animals MH - Genotype MH - Injections, Intramuscular MH - Porcine Reproductive and Respiratory Syndrome/immunology/*prevention & control MH - Porcine respiratory and reproductive syndrome virus/genetics/*immunology MH - Swine MH - Vaccination/methods/*veterinary MH - Vaccines, Attenuated/administration & dosage/immunology MH - Viral Load/veterinary MH - Viral Vaccines/administration & dosage/*immunology OTO - NOTNLM OT - co-infection OT - genotype OT - porcine reproductive and respiratory syndrome (prrs) OT - vaccine COIS- Competing interests: None declared. EDAT- 2018/02/24 06:00 MHDA- 2018/05/03 06:00 CRDT- 2018/02/24 06:00 PHST- 2017/03/07 00:00 [received] PHST- 2017/11/07 00:00 [revised] PHST- 2018/01/28 00:00 [accepted] PHST- 2018/02/24 06:00 [pubmed] PHST- 2018/05/03 06:00 [medline] PHST- 2018/02/24 06:00 [entrez] AID - vr.104397 [pii] AID - 10.1136/vr.104397 [doi] PST - ppublish SO - Vet Rec. 2018 Apr 28;182(17):485. doi: 10.1136/vr.104397. Epub 2018 Feb 22.