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Bulletin No. 17 - Winter 2003
VirologyPorcine Reproductive and Respiratory Syndrome (PRRS)
REYNAUD G, CHARREYRE C, TEDESCHI L, BRUN A, JOISEL F, JEANNIN P
Homologous PRRSV challenge after vaccination with an inactivated PRRS vaccine: Progressis® Merial.
Proceedings of the 1st APVS Congress, Seoul, September 2003, 171-172
Six-week old piglets were vaccinated twice with PROGRESSIS®(Merial) inactivated adjuvanted vaccine with a 3-week interval while others were kept as non-vaccinated controls. All of them were challenged intranasally with the parental virulent strain of PRRSV 35 days later. Subsequently, vaccinated and control animals were kept either separated in PRRSV-free premises or all together in the same barn. The results of this study confirm that PROGRESSIS® significantly reduces the percentage of viremic piglets, both in PRRSV-free and PRRSV-contaminated environment.
