Antibody responses to M. ovipneumoniae and parainfluenza-3 (PI-3) virus.

1M. ovipneumoniae antibody detected by cELISA, expressed as percentage inhibition of the binding of an agent-specific monoclonal antibody [14], [18].2PI-3 virus neutralizing antibody detected by virus neutralization [37].3Pre samples in experiment 1 were obtained on the day that the M. ovipneumoniae colonized domestic sheep was introduced to pen 1 and in experiment 2 were obtained on the day that BHS #39 was inoculated with M. ovipneumoniae. ‘Post’ samples in both experiments were obtained at necropsy. Neg = No titer detected. NT = Not tested, due to inadequate specimen volume.Antibody responses to M. ovipneumoniae and parainfluenza-3 (PI-3) virus.