Abstract
ABSTRACTPurpose of this work was to analyse prevalence of porcine reproductive and respiratory syndrome (PRRS) in pig farm ‘B’. It was established that this virus infection had spread in the farm when quarantine conditions had been disregarded and newly brought pigs had been mixed with the ones present at the farm. During 1999, when the breakthrough of the disease was present, sows delivered 21421 piglets, including 19661 (91.7%) alive, 850 (4%) dead and 910 (4.3%) that died after delivery. In the farm ‘B’ from 529 main and 518 alternative sows 75 ones (7.1%) delivered prematurely (up to 108 days) and 58 (5.5%) aborted. Specific PRRS symptoms were high body temperature (up to 41°C), cyanosis of ears and milk glands, loss of appetite, increased irritability, abortions and deliveries of dead piglets. 25 percent of sows were found agalactic. Sows let them suckle reluctantly, and the piglets died for the cause of starvation. Further appearance of the disease was stabilised by using strict fight and prophylactic measures.
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