title: Development of a duplex PCR genotyping assay for distinguishing Clostridium perfringens type A isolates carrying chromosomal enterotoxin (cpe) genes from those carrying plasmid-borne enterotoxin (cpe) genes.
abstract: About 5% of Clostridium perfringens type A isolates carry the cpe gene encoding the C. perfringens enterotoxin. Those cpe-positive type A isolates are important causes of food-poisoning and non-food-borne cases of diarrheas in humans, as well as certain veterinary cases of diarrhea. Previous studies have determined that the enterotoxigenic type A isolates causing both non-food-borne human gastrointestinal disease and veterinary disease carry their cpe genes on plasmids, while the type A isolates causing human food poisoning carry a chromosomal cpe gene. The present study reports on the successful development of a duplex PCR assay that can rapidly genotype enterotoxigenic type A isolates (i.e., determine whether those cpe-positive isolates carry a chromosomal or a plasmid-borne cpe gene). The availability of this rapid cpe genotyping assay capable of handling large numbers of samples provides a powerful new investigative tool for diagnostic, epidemiologic, and basic research purposes.
authors.affiliation: Department of Molecular Genetics and Biochemistry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA.
authors.forename: Qiyi
authors.initials: Q
authors.lastname: Wen
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Bruce A
authors.initials: BA
authors.lastname: McClane
mesh_terms: D015373:Bacterial Typing Techniques; D002876:Chromosomes, Bacterial / Q000235:genetics*; D003015:Clostridium Infections / Q000382:microbiology; D003016:Clostridium perfringens / Q000145:classification* / Q000235:genetics; D004768:Enterotoxins / Q000235:genetics*; D005838:Genotype; D006801:Humans; D010957:Plasmids / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*
chemical_list: D004768:Enterotoxins; C035598:enterotoxin, Clostridium