European PRRSpective 2023 session 2 Controlling farm breakdowns
Porcine circovirus type 2 (PCV2) has a great impact on breeding herds, predominantly associated with increased stillborn and mummified fetuses at parturition. (1, 2) Reports have shown that mass vaccination of sows against PCV2 would improve the reproductive performance and are proven to be safe. This study reports a recurrence of PCV2 infection in the sow herd after discontinuation of mass vaccination against PCV2.
Long-lasting immunity achieved by means of vaccination is the main tool to prevent porcine parvovirus 1 (PPV1) infection and its associated clinical signs. Here it is reported the evaluation of the duration of immunity (DOI) conferred by a novel subunit vaccine based on the viral protein 2 of PPV1, named ReproCyc® ParvoFLEX.
After outbreaks of porcine reproductive and respiratory syndrome virus (PRRSV) infections in sow herds, the time to stability of the sow herd can take 18 to 55 weeks.1,2 Different sampling strategies (e.g., processing fluids, serum, or oral fluids) have been described to assess the PRRSV-status after implementing control measures like sow vaccination, improvement of hygiene protocols, lowering stocking density, and piglet flow optimization.1,3 Thus, we aimed to compare the different described strategies regarding their applicability for monitoring the PRRSV-status in a 3000-sow herd after a PRRS outbreak.
Porcine Reproductive and Respiratory Syndrome (PRRS) Virus is one of the major pathogens in pigs that have a significant economic impact on the swine industry worldwide. Modified life vaccine (MLV) against PRRSV has been demonstrated as an effective tool to control clinical signs related to infection. In literature, it is described that maternally derived antibodies (MDA) might interfere with MLV vaccination efficacy.