The detection of M. hyopneumoniae, P. multocida, S. suis, H. parasuis and A. pleuropneumoniae in piglets at weaning in 5 farrow-to-finish farms.

SUMMARY A survey was carried out to assess the contamination of piglets by Mycoplasma hyopneumoniae, Pateurella multocida, Actinobacillus pleuropneumoniae, Streptococcus suis and Haemophilus parasuis in 5 farrow-to-finish pig farms. At weaning, in each farm, a sample of 60 piglets belonging to one batch was randomly selected and submitted to nasal, tonsillar and oropharyngeal swabs. All samples were analysed with PCR to detect the pathogens. The study indicates that Hps, Pm and Ssuis are commonly found in the upper respiratory tract of young piglets. Contamination by Mhp and App seems to be less detected at this stage of rearing according to the methods used.