[Rapid detection of Vibrio parahaemolyticus by TaqMan-based real-time PCR assay targeting the toxR gene].
We designed a pair of specific primers and a TaqMan fluorescent probe targeting the toxR gene of Vibrio parahaemolyticus (VP). After optimizing the conditions, the specialty, sensitivity and reproducibility of the detection method were evaluated.


RESULTS
(1) the developed real-time PCR assay protocol detected only VP and was not affected by other normal food pathogens such as Staphylococcus aureus, Salmonela, Listeria monocytogenes. (2) the limit of detection was 25 copies of toxR gene in the detected samples, and the sensitivity of pure cultures and simulated food samples was 21 cfu/mL and 210 cfu/g. (3) the developed protocol of real-time PCR assay had a high reproducibility, and the sample's variation was 0.9% and 1.3% within the same sample and between tests. (4) the standard curve had a good linearity when the gene quantity was between 2.5x10(1) and 2.5x10(6) copies. The developed detection assay targeting the toxR gene can quantitatively detect VP in only 3 hours, and thus is an efficacious method for the detection of Vibrio parahaemolyticus.
Qin
Yiying
Y
College of Light Industry & Food, South China University of Technology, Guangzhou 510640, China.
Wu
Hui
H
Xiao
Xinglong
X
Yang
Xiaoquan
X
Zhang
Jingwei
J
Yu
Yigang
Y
Li
Huifang
H
D001426:Bacterial Proteins / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics*; D005456:Fluorescent Dyes / Q000378:metabolism; D018390:Gene Targeting; D016133:Polymerase Chain Reaction / Q000379:methods*; D012680:Sensitivity and Specificity; D019914:Taq Polymerase / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics*; D014736:Vibrio parahaemolyticus / Q000235:genetics / Q000302:isolation & purification*
D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D005456:Fluorescent Dyes; D014157:Transcription Factors; C066719:toxR protein, bacteria; D019914:Taq Polymerase