Swine Bibliography Centre
|
Support that keeps you updated for FREE  |
Bulletin No. 27 - Summer 2007
BacterologyMycoplasma hyopneumoniae
BILIC BN, BILKEI G
Effect of outdoor pig production on the seroprevalence of Mycoplasma hyopneumoniae and lung lesions.
Veterinary Record, 2006, Volume 158, N°9, 303-305
Two groups of piglets born from twenty-two Mycoplasma hyopneumoniae-seropositive sows belonging to a pig production unit of 2500 sows were formed and kept either indoor (n=101) or outdoor (n=100) after weaning. All piglets were fed the same diet and slaughtered when they reached 110-120kg. Lung lesions of enzootic pneumonia (EP) were evaluated at slaughter in all included pigs while the seroprevalence investigations were conducted periodically in the smallest weaned pig of each litter, i.e. in a total of 10 pigs per group, using a commercial ELISA with coating antigen. The percentage of lungs showing EP lesions was significantly higher in pigs raised indoor (29.91%) than in those raised outdoor (15.87%). The difference of antibody profile between the two groups became significant from 12 weeks postweaning (p<0.05) and even greater at 16 and 20 weeks postweaning (p<0.01). Outdoor pig production is thus a reliable management tool to reduce economic loss due to EP.
