Enhancing the impact of regional health improvement programmes
Research partner: Warwick University
Sponsor: AHDB Pork-funded studentship (Daniel Franklin)
Duration: 2010 – 2014
Aims and objectives
- To help the pig industry understand how porcine reproductive and respiratory syndrome (PRRS) and swine dysentery (SD) persist in the national herd
- To develop mathematical simulation models to help understand the role of the metaherd in the spread of PRRS
- To use these models to test control and intervention strategies across the metaherd.
Findings to date
- The use of vaccinations in the metaherd was simulated
- The metaherd level gives an indication of what extent PRRSV reduces productivity from a regional perspective
- Results suggest that fadeout within the metaherd does not occur once infection has spread to herds >150 sows
- Results suggest that a loose threshold herd size exists, between 100-150 sows, below which infection does not persist in a herd.
Full results and details on the vaccination strategy work will be available in the near future.