European PRRSpective 2023 session 2 Controlling farm breakdowns
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The aim of the study was to calculate the time to PRRSv-stability (TTS), the time-to-baseline-production (TTBP) and total losses in a European context.
The use of INGELVAC PRRS vaccines can significantly reduce lung lesions following challenge with heterologous isolates (86- 94% ORF5 nucleotide similarity) in the three-week-old pig respiratory challenge model.1 INGELVAC PRRS MLV demonstrated heterologous protection against challenge with current PRRSV lineage-1 RFLP 1-7-4 and 1-3-4 isolates.2 The objective of this study was to evaluate the efficacy of two commercially available PRRSV vaccines in a three-week-old pig respiratory challenge model, using a heterologous PRRSV lineage-1 RFLP 1-7-4 field strain that was isolated in 2016.
Despite the intensive vaccination programs applied in the field, erysipelas continues to be a costly global concern for the swine industry and public health 1,2,3. Post-farrowing vaccination is routinely applied to protect the breeding stock. However, there is a need to vaccinate growing pigs due to a lack of protection in the finishing period, and it is not uncommon to detect outbreaks in the field due to antibody waning 4,5. There is a need for further studies that aim at investigating other vaccination protocols that may increase protection against erysipelas under commercial conditions. Therefore, the specific objectives of this study were two-fold: 1) to study the seroconversion in sows and piglets between pre- and post-farrowing protocols against erysipelas over time; and 2) to describe the time-to-negative erysipelas protection between protocols.
Porcine parvovirus (PPV) is widespread in swineherds globally and causes reproductive failure manifested by the SMEDI-syndrome. DTU VET receives annually between 50-100 samples from aborted fetuses from Danish herds. During recent years, the average prevalence of positive submissions has increased from 4 % to 17 %. The aim of the study is to investigate the genetic and antigenic diversity of Danish PPV isolates. Furthermore, the cross reactivity of antibodies raised to commercial available PPV vaccines was tested.