Comprehensive review on the recent knowledge of porcine reproductive and respiratory syndrome (PRRS)
1996
Medveczky, I. (Allatorvostud. Egy., Budapest (Hungary))
A comprehensive review has been given on the recent scientific results (causative agent, pathogenesis, epizootiology, diagnosis, clinical symptoms, control) of PRRS, a diseases endangering also the Hungarian pig population. Clinical features and economical losses have been detailed in Tables which characterized the PRRS infections observed by Danish SPF farms with mild clinical symptoms. Of the symptoms observed by the Danish farmers, agalactia (64) and drastic increase of the number of stillbirths (56) were the most characteristics at the beginning of the infection on the 40 SPF farms investigated (Table 1). Table 2 gives information about the number of piglets born alive and dead pro litter, as well as about the number of losses observed on Danish SPF farms. Losses in finishing units originated mainly from the decrease of daily weight gain (26 g/day) and from the increased feed conversion (0.4 FEs/kg, Table 3). Production indices of the infected farms reached the original levels 26 weeks after the outbreaks, on an average. The review has been based on the information of the lectures held on the Expert Course organized by the Federation of Danish Pig Producers and Slaughterhouses and 2nd International Symposium on PRRS (Copenhagen, 1995). Hungary is still free of the diseases at the time of receiving the article (January, 1996). PRRS is a reportable disease since 1996
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