The objective of this study was to evaluate type 2 porcine reproductive and respiratory syndrome virus (PRRSV)-based modified live vaccine in a herd with concurrent circulation of type 1 and type 2 PRRSV. Type 2 PRRSV-based modified live vaccine improved average daily gain by 48.24 grams/pig/day (631.17 grams/pig/day in the vaccinated group vs 582.93 grams/pig/day in the unvaccinated group; P < 0.05). Pathological examination indicated that the vaccination effectively reduced microscopic lung lesions compared with the control animals. The protection of this vaccine against type 1 and type 2 PRRSV provides clinical control of co-infection with both genotypes under field conditions.
Kang, Ikjae; Kang, Hei Suk; Jeong, Jiwoon; Park, Changhoon; Kim, Seeun; Choi, Kyuhyung; Park, Su-Jin; Hwang, Sung-Min; Oh, Beomseok; Kim, Sung-Hoon; Kang, Byunghak; and Chae, Chanhee
"Improved growth performance by type 2 porcine reproductive and respiratory syndrome virus (PRRSV)-based modified live vaccine in a herd with concurrent circulation of type 1 and type 2 PRRSV,"
The Thai Journal of Veterinary Medicine: Vol. 47:
1, Article 3.
Available at: https://digital.car.chula.ac.th/tjvm/vol47/iss1/3