Some virulent elements of Mycoplasma hyopneumoniae strains isolated from pigs in Viet Nam

Abstract

Detection of the genes encoding for some virulent elements of 8 Mycoplasma hyopneumoniae (M. hyopneumoniae) strains, which isolated from pigs raising in Viet Nam, was carried out by using PCR method. The studied result revealed that, all of 8 isolated strains carried P36, P46, P65 and P97 genes. Moreover, the result of testing virulence of these bacteria strains on the experimental pigs showed that all of the tested strains were able to cause the clinical signs and lung lesions with different levels in the experimental animals. These findings are important basis for selection of a candidate-strain that can be used as a master-seed for producing vaccine against M. hyopneumoniae infection in pigs.