Bacteriological and molecular typing of <i>Clostridium perfringens</i> strains isolated in retail beef in Beijing, China

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  • JIANG Hui
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China
  • QIN Yu-Ming
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China
  • YANG Xiao-Tong
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China
  • LI Qiao-Ling
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China
  • SHEN Qing-Chun
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China
  • DING Jia-Bo
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China
  • WEI Run-Yu
    Laboratory of Zoonoses, China Animal Health and Epidemiology Center, Qingdao, 266032, China
  • ZHANG Jian-Dong
    Laboratory of Zoonoses, China Animal Health and Epidemiology Center, Qingdao, 266032, China
  • SUN Jia-Li
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China
  • SUN Ming-Jun
    Laboratory of Zoonoses, China Animal Health and Epidemiology Center, Qingdao, 266032, China
  • FAN Xue-Zheng
    Department of Veterinary Technology, China Institute of Veterinary Drug Control, Beijing, 100081, China

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<p>Clostridium perfringens is an important zoonotic pathogen. This study was designed to explore the prevalence and toxin types of C. perfringens in retail beef collected from Beijing, China. Among 221 beef samples collected, 53 samples were positive for C. perfringens, resulting in the average prevalence as 23.98%. By toxin gene-based typing, the most C. perfringens strains belong to type A (96.23%, 51/53), only 2 strains were identified as type D. By a multi-locus sequence typing (MLST)-based analysis, a total of 36 sequence types (STs) were detected, and the most STs (n=30) represented just a single strain. These finding suggested that the prevalence of C. perfringens in retail beef in Beijing was considerably high and these bacteria displayed extreme diversity in genetics.</p>

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