The aim of this study was to assess the genetic variability of Mycoplasma hyopneumoniae within various swine production flows. Four M. hyopneumoniae positive production flows, composed of 4 production stages, were selected for this study. Laryngeal and/or bronchial swabs were collected from each production stage within a flow, for a period of 4 months up to 3 years. A multiple-locus variable-number tandem repeat analysis was performed to assess the genetic variation of M. hyopneumoniae within and across production flows through the identification of variable-number tandem repeat (VNTR) types. A maximum of 6 M. hyopneumoniae VNTR types were identified in a single flow, in which VNTR types appeared to be flow specific. An identical VNTR type was detected across several production stages for up to 3 years. In this study, minimal M. hyopneumoniae genetic variation was evidenced within and across production flows.
Betlach A, Fano E, Sponheim A, Valeris-Chacin R, Dalquist L, Singer R, Pieters M. Comparison of Mycoplasma hyopneumoniae genetic variability within swine production flows. Can J Vet Res. 2020 Oct. http://www.ncbi.nlm.nih.gov/pmc/articles/pmc7490998/