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Bulletin No. 22 - Summer 2005
BacterologyMycoplasma hyopneumoniae
DOTTORI M, GUSMARAC C, LEOTTI G, OSTANELLO F, SALA V
Impiego del punteggio polmonare al macello nella valutazione della malattia respiratoria da M. hyopneumoniae sul suino pesante [The use of slaughterhouse lung-score for the assessment of M. hyopneumoniae disease in the heavy swine].
Società Italiana di Patologia ed Allevamento dei Suini - Proceedings, 2005, 211-220
A total of 10041 pigs distributed into 109 slaughter lots and originating from 91 farms located in North Italy were scored for lung lesions according to the Madec and Kobish method which consists in scoring each of the seven lobes from 0 to 4 and adding the seven scores to get the final lung score. The mean score was 2.11 with a variability ranging from 0.03 to 7.15. All lots had at least one pig with pulmonary lesions and 60% of the pigs included in this study shown M. hyopneumoniae-induced lesions. Such a quantitative approach and such a large number of pigs had never been used in a study to assess the impact of enzootic pneumonia on the production of heavy pigs. Lung scoring proved a reliable tool for this category of swine as well and allowed to demonstrate that the clinical impact of M. hyopneumoniae-infection clearly depends on management and that the impact on productivity is relevant. The mean lung score of each slaughter lot is a good indicator of the extent of the detrimental effect of M. hyopneumoniae-infection on production. The highest mean lung scores were observed in slaughter lots from farrow-to-finish farms while the lowest were observed in lots from vaccinated herds.
