Mining of serotype specific genes and establishment of a PCR for detection Salmonella enterica serovar Heidelberg
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(Anhui Science and Technology University, Chuzhou, Anhui 233100, China)

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    Abstract:

    Salmonella enterica serovar Heidelberg,(SH)is pathogenic serotypes within Salmonella. Using BLAST and PCR validation for all CDSs of SH, four serovar-specific genes were identified including SeHA_C2639, SeHA_C2640, SeHA_C3259 and SeHA_C3258. A PCR protocol was developed by pHAm8 (350 bp) of SH-specific primer and 139-141 (284 bp) of Salmonella-specific primer and evaluated for the detection of SH. The result showed that the 55 strains of serotype of Salmonella and other common foodborne pathogens proved that the PCR assay had very good specificity for the detection of SH. The detection limit was 6.1 × 102 CFU/mL in pure culture. It was shown that S. Typhimurium and Escherichia coli as interfering bacteria up to concentrations of N×105~N×101 CFU/mL, respectively, did not interfere with PCR detection of SH. In artificially contaminated milk, the protocol could detect less than 1.52 CFU/mL after 8 h enrichment. The detection method could quickly and accurately detect food SH, application in the field of food safety in favor.

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翟立公,郭元新,王俊颖,等. S.Heidelberg血清型特异性基因筛选及PCR检测方法的建立与应用[J].食品与机械英文版,2018,34(6):50-54,57.

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History
  • Received:January 18,2018
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  • Online: March 17,2023
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