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Oppeneder, Alexander, Griessler, Alfred, Voglmayr, Thomas, Reitboeck, Romana, Renzhammer, Rene, Ritzmann, Mathias, Stadler, Julia and Ladinig, Andrea (2020): Ökonomische Auswirkung eines PRRS-Viruseintrages mittels Sperma in Betrieben mit unterschiedlichem PRRSV-Status. In: Berliner und Münchener Tierärztliche Wochenschrift, Vol. 133: pp. 49-58

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Porcine reproductive and respiratory syndrome (PRRS) causes huge economic damage to the global pig production. The aim of this study was to compare the economic effects of a PRRS virus (PRRSV) introduction into three sow farms with different PRRSV status. The same PRRSV isolate was introduced into all three sow farms at the same time via semen after a PRRSV outbreak in a boar stud. The highest losses with 211 EUR per sow during an 18-weeks observation period occurred on the previously PRRSV naive farm 1. Farm 2, which had a PRRSV positive status at the time of introduction, experienced losses of 68 EUR per sow despite regular vaccination of sows with a modified live virus vaccine. The PRRSV naive farm 3 was able to prevent further spread of PRRSV in the sow herd by slaughtering PRRSV positive sows from the breeding area. Nevertheless, farm 3 had a total loss of 119 EUR per sow. On average, PRRSV introduction caused a damage of 133 EUR per sow on the three investigated farms. In addition, clinical impacts were compared between farm 1 and 2 by determining the time to PRRSV stability (TTS) and the time to baseline production (TTBP). In the PRRSV naive farm 1, it took 43 weeks to reach PRRSV stability compared to 27 weeks in the PRRSV vaccinating farm 2. The time until the number of weaned piglets per litter increased up to the level before PRRSV introduction was 29 weeks in farm 1. In contrast, no decrease of the production level was apparent on farm 2.

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