Challenge of Pigs Previously Immunised with Inactivated Vaccines Containing Homologous and Heterologous <em>Mycoplasma hyopneumoniae</em> Strains
All bacterins used evoked a serological response in the vaccinated animals and yet, after challenge with a highly virulent M. hyopneumoniae strain, there was no clear evidence of protection against clinical symptoms or lung lesions, according to University of Ghent researchers.