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http://dx.doi.org/10.7845/kjm.2016.6039

Genetic diversity of Clostridium perfringens form food-poisoning outbreak in Gyeonggi-do, 2013-2014  

Park, Sung-Hee (Team of Infectious Disease Investigation, Gyeonggi Institute of Health and Environment)
Choi, Ok-Kyung (Team of Infectious Disease Investigation, Gyeonggi Institute of Health and Environment)
Jeong, Jin-A (Team of Infectious Disease Investigation, Gyeonggi Institute of Health and Environment)
Kim, Woon-Ho (Team of Infectious Disease Investigation, Gyeonggi Institute of Health and Environment)
Lee, Yea-Eun (Team of Infectious Disease Investigation, Gyeonggi Institute of Health and Environment)
Park, Kwang-Hee (Team of Infectious Disease Investigation, Gyeonggi Institute of Health and Environment)
Yoon, Mi-Hye (Team of Infectious Disease Investigation, Gyeonggi Institute of Health and Environment)
Publication Information
Korean Journal of Microbiology / v.52, no.3, 2016 , pp. 286-297 More about this Journal
Abstract
Clostridium perfringens is both a ubiquitous environmental bacterium and a major cause of human gastrointestinal disease, and C. perfringens food poisoning ranks among the most common gastrointestinal diseases in developed countries. 120 isolates of C. perfringens were obtained from food-poisoning outbreaks in 2013~2014, Gyeonggi-do. Using PCR, all 120 isolates were identified as C. perfringens type A. Of the tested isolates, 49 isolates carried the cpe gene, 71 isolates carried the cpb2 gene. The outbreak cases of cpb2 and cpe /cpb2 genes were 7 and 7, whereas the outbreak cases of cpe-gene were 2. The epidemiological relationship between C. perfringens isolates has previously been investigated chiefly by pulsed-field gel electrophoresis (PFGE) and multi-locus sequence typing (MLST). The genetics relatedness of the isolates raged from 53.5-100% and 75 district PFGE type were observed. The PFGE results revealed a wide genetic diversity among the 64 cpb2 carrying isolates (except 7 isolates), while 46 cpe-carrying isolates (except 3 isolates) showed a high genetic similarity. The MLST analysis revealed that 14 cpe isolates (cpe-chromosomal isolates) belong to a distinct cluster that is significantly distant from all the other cpb2 isolates (cpe-plasmid carrying and cpe-negative isolates). The isolates carrying a cpb2 appear to be rarely related, and are more variable than chromosomal cpe isolates. The results suggest that the cpe-positive outbreak isolates showed close genetic relation, whereas the cpb2-positive isolates revealed a wide genetic diversity.
Keywords
Clostridium perfringens; MLST; PFGE; toxinotype;
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