Sow-to-piglet transmission is considered one of the most important aspects of the epidemiology of Mycoplasma hyopneumoniae. The degree of piglet colonization at weaning age has been suggested as a predictor of clinical disease at market age. However,sow-to-piglet colonization widely varies among farms and weaning groups, and even within the same farm. Therefore, the objective of this study was to identify risk factors associated with M. hyopneumoniae piglet colonization during the lactation period.
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