alexa Multi-locus Sequence Typing Of Campylobacter Jejuni Using A Novel Polymerase-chain-reaction-microsphere Method
ISSN: 2155-9597

Journal of Bacteriology & Parasitology
Open Access

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2nd International Congress on Bacteriology & Infectious Diseases
November 17-19, 2014 DoubleTree by Hilton Hotel Chicago-North Shore, USA

Ross T Barnard, Fang Liang, Lawrence Wong, Jillian Templeton and Pat Blackall
Posters: J Bacteriol Parasitol
DOI: 10.4172/2155-9597.S1.007
Introduction: Campylobacter is a major cause of foodborne disease, with Campylobacter jejuni contributing more than 90% of reported cases. For diagnosis and monitoring of transmission, several genotyping methods have been developed, including multi-locus sequence typing (MLST). However, there is still a need for fast, cost effective methods for routine analysis. We developed a technique combining allele-specific PCR with a microsphere-flow cytometer system. Seven loci with singlenucleotide polymorphisms (SNPs) with the highest Simpson?s index of diversity (D) were selected from an MLST database. With these loci as a target, multiplex allele-specific PCR was conducted on microspheres in a single reaction and fluorescence signal was detected in a flow cytometer. The signal on the microspheres indicated which allele specific primer was consumed in the PCR. By this means all seven loci could be determined. This approach has a turnaround time of 4 h. Results: To date, the method has been tested with two strains of Campylobacter jejuni possessing known SNP patterns and six of seven loci have, at time of writing, been correctly determined for these strains, in a single PCR reaction. Conclusion: A new allele specific PCR-microsphere-based method for genotyping Campylobacter jejuni is under development. This approach will be useful in laboratories utilizing PCR and flow cytometers.
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