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第19号公告板 - Fall 2004
Parasitology- No Category
VYT P, DE BIE S, KANORA A
Correlation between white liver spots and pneumonia: a slaughterhouse survey
Proceedings of International Pig Veterinary Society 18th Congress, June 27-July 1, 2004, Hamburg, Germany, Volume 2, Page 582, Abstract No. 638
In practice, slaughterhouse data are frequently used to monitor disease problems at farm level. During a period of 3.5 years, 56 farms (51 mixed farms and 5 fattening farms) were monitored by recording individual data of all pigs slaughtered at the LVV plant at Lokeren, Belgium by the veterinarians responsible for the post-mortem examination. From the 152,364 pigs, 11.1 % of livers were condemned, 3.8 % had 'pneumonia 1' and 7.1 % had 'pneumonia 2'. Farms with the AI-AO system (n=23) had less lesions (8.9 % liver, 3.2 % 'pneumonia 1' and 5.7 % 'pneumonia 2'), than with a continuous (n=33) fattening system (15.4 % liver, 4.2 % 'pneumonia 1' and 7.85 % 'pneumonia 2'). Our data reveal that 11 % of the livers is rejected at slaughter because of multiple white spots. The follow-up during a 3.5-year period confirms the level of the worm problem on the different farms. High liver and lung lesions were negatively correlated with the all-in/all-out management system. Even though we have no data on hygiene, stable climate or specific disease problems, AI AO is clearly an important tool in preventing both liver and lung lesions. In conclusion we can say that even with the modern knowledge on anthelminthic therapy, still a high number of livers is condemned at slaughter. A correlation between liver and lung lesions is present when liver lesions are not extremely high and both liver and lung lesions seem to be reduced when applying the AIAO management system.
