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A comparison of two commercially available porcine reproductive and respiratory syndrome virus (PRRSV) modified-live virus vaccines analyzing the growth performance in 1-day-old vaccinated swine located on endemic farms co-circulating PRRSV-1 and PRRSV-2open access
- Authors
- Yang, Siyeon; Kang, Ikjae; Jeong, Jiwoon; Oh, Taehwan; Park, Kee Hwan; Park, Su-Jin; Ham, Hee Jin; Jin, Guang-Ri; Lee, Bog-Hieu; Chae, Chanhee
- Issue Date
- Feb-2020
- Publisher
- JAPAN SOC VET SCI
- Keywords
- 1 day of age vaccination; modified live-virus vaccine; porcine reproductive and respiratory syndrome virus
- Citation
- JOURNAL OF VETERINARY MEDICAL SCIENCE, v.82, no.2, pp 224 - 228
- Pages
- 5
- Journal Title
- JOURNAL OF VETERINARY MEDICAL SCIENCE
- Volume
- 82
- Number
- 2
- Start Page
- 224
- End Page
- 228
- ISSN
- 0916-7250
1347-7439
- Abstract
- The objective of this study was to compare the efficacy of a porcine reproductive and respiratory syndrome virus (PRRSV)-1 and PRRSV-2 modified-live virus (MLV) vaccines when administered at 1 day of age under field conditions. The piglets elicited anti-PRRSV antibodies at 1 day of age even in the presence of maternally derived antibodies. The number of PRRSV-2 genomic copies in the sera of pigs from the PRRSV-2 MLV-vaccinated pigs was significantly (P<0.05) lower when compared to PRRSV-1 MLV-vaccinated pigs. The average daily gain in PRRSV-2 MLV-vaccinated pigs was significantly (P<0.05) higher when compared to both PRRSV-1 MLV-vaccinated and unvaccinated pigs. This study demonstrated that vaccination as early as 1 day of age was effective against PRRSV infection.
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