Shou-Shen Yang

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Streptococcus suis isolates from diseased pigs were examined for susceptibility to nine antimicrobials, possession of virulence-associated factors (VFs), and distribution of serotypes. The association between antimicrobial resistance (AMR) and serotypes as well as VFs was subsequently assessed. Among the isolates investigated, serotype 2 (66.04%) was mostly(More)
BACKGROUND The association of PMQR and ESBLs in negative-bacteria isolates has been of great concern. The present study was performed to investigate the prevalence of co-transferability of oqxAB and bla CTX-M genes among the 696 Escherichia coli (E. coli) isolates from food-producing animals in South China, and to characterize these plasmids. METHODS The(More)
In this study, the prevalence of plasmid-mediated quinolone resistance (PMQR) was investigated in 495 Escherichia coli isolates from diseased food-producing animals in Guangdong province, China. The quinolone resistance-determining regions (QRDRs) of the gyrA and parC genes were analysed for mutations in 55 isolates harbouring only oqxAB and all isolates(More)
Sir, Haemophilus parasuis is the causative agent of Glässer’s disease, characterized by fibrinous polyserositis, polyarthritis and meningitis in pigs, which causes considerable economic losses in the swine industry. Macrolide antibiotics inhibit bacterial protein synthesis by binding to the 50S ribosomal subunit. Although macrolides are widely used in the(More)
Development of antibiotic resistance may alter the virulence properties of bacterial organisms. In this study, nine clinical ceftriaxone-susceptible Salmonella enterica serotype Typhimurium strains were subjected to stepwise selection with increasing concentrations of ceftriaxone in culture media. Mutations in virulence-associated genes and antibiotic(More)
Plasmid-mediated quinolone-resistance (PMQR) genes were determined by polymerase chain reactions (PCRs) in 250 Escherichia coli isolates from food-producing animals in Guangdong, China, in 2009-2010. Then, the prevalence of plasmid-mediated β-lactamase and 16S rRNA methylase genes was determined by PCRs among the PMQR-positive isolates. One hundred(More)
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