For the M. hyopneumoniae (Strasser et al., 1992), M. hyorhinis (Kobisch, 1983), and M. flocculare (Strasser et al., 1992) challenges, twelve 6-week-old female CDCD pigs
For the M. hyopneumoniae (Strasser et al., 1992), M.hyorhinis (Kobisch, 1983), and M. flocculare (Strasser et al.,1992) challenges, twelve 6-week-old female CDCD pigs