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PRRS: effect on herd performance after initial infection and risk analysis

J Brouwer¹, K Frankena, M F de Jong

¹Agricultural University, Department Animal Husbandry, Wageningen, The Netherlands.

The Veterinary Quarterly

|July 1, 1994

Summary

Porcine Reproductive and Respiratory Syndrome (PRRS) severely impacted Dutch pig farms for 4-6 months, causing significant economic losses. No major risk factors were identified to mitigate PRRS

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Area of Science:

Veterinary Science
Animal Husbandry
Epidemiology

Background:

The Dutch pig industry faced a significant challenge with the emergence of Porcine Reproductive and Respiratory Syndrome (PRRS) in early 1991.
PRRS is a disease known to affect swine health and productivity.

Purpose of the Study:

To investigate the impact of PRRS on pig productivity using data from affected herds.
To evaluate the relationship between PRRS outbreaks and various farm and management factors.

Main Methods:

Analysis of data from 91 Dutch pig herds testing positive for PRRS.
Utilized the CBK management information system for farm data.
Conducted an economic evaluation based on sow productivity and replacement rates.

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Main Results:

Herd performance was severely affected for 4-6 months post-PRRS outbreak.
Economic losses averaged Hfl. 215 per sow per year.
Decreased piglets per litter, prolonged farrowing intervals, and higher sow replacement rates contributed to losses.

Conclusions:

PRRS significantly reduced productivity and caused substantial economic losses in the Dutch pig industry.
No specific farm or management factors were identified as major contributors to mitigating PRRS' negative effects on key performance indicators.