In vitro Antibiotic Susceptibility, Virulence Genes Distribution and Biofilm Production of Isolates from Bovine Mastitis in the Liaoning Province of China.

Purpose: The aim of this study was to identify the subtype, characterize the antimicrobial resistance, determine the virulence gene distribution, and analyze the biofilm production of isolates from bovine mastitis milk samples in the Liaoning Province of China.

Materials And Methods: In total, 56 isolates were collected and identified in this study; the isolates were divided into different types based on the sequence of the polymorphic X region of the gene. Additionally, antimicrobial susceptibility was investigated using the broth microdilution method, and 18 virulence genes were detected using PCR.

Resistance to β-lactam antibiotic may influence nanH gene expression in Trueperella pyogenes isolated from bovine endometritis.

Virulence could be modulated by many instinctive and environmental factors including oxygen, osmolarity and antimicrobial agents. This study aimed to investigate the correlation between drug resistance and the nanH expression in Trueperella pyogenes (T. pyogenes).