Several authors have estimated that a PRRS outbreak could cost a mean of approximately €100-200 for each sow in the farm.
After analysing PRRS outbreaks in nine sow herds, Dutch researchers calculated that the number of sold pigs per sow could be reduced by up to 1.7 (-18%) and that the impact cost of PRRS during the outbreak taking into account production data, medication, diagnostics, labour, etc. resulted in losses of between €59 and €379 (mean loss €126) for one sow per 18-week outbreak period.
In general, farms suffered decreases in the number of live-born piglets (from -2 to -17% per parturition; mean -8%) and increments in mortality rates preweaning (from +17 to +124%; mean 36%) and postweaning (from 85 to 350%; mean 167%).
According to the authors, financial losses varied due to the:
- PRRS virus strains involved.
- Characteristics of the farm.
- Measures applied to control the infection.