S.Heidelberg血清型特异性基因筛选及PCR检测方法的建立与应用
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(安徽科技学院,安徽 滁州 233100)

作者简介:

翟立公,男,安徽科技学院讲师,博士。

通讯作者:

郭元新 (1971—),男,安徽科技学院教授,博士。E-mail: guoyuanxiner@163.com

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高校优秀青年人才支持计划重点项目(编号:gxyqZD2016219);安徽科技学院人才引进项目(编号:SPYJ201602)


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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    摘要:

    海德尔堡沙门氏菌(Salmonella enterica serovar Heidelberg, SH)是沙门氏菌属内重要的致病性血清型。通过对SH基因组序列进行BLAST比对和PCR验证,筛选出了4个SH血清型特异性基因(SeHA_C2639、SeHA_C2640、 SeHA_C3259和SeHA_C3258)。以SeHA_C3258作为靶点设计引物pHAm8(350 bp)和沙门氏菌属特异性引物139-141(284 bp),建立SH的PCR检测方法,并对其应用效果进行评价。结果表明,经55株不同血清型的沙门氏菌和其他常见食源性致病菌证明,该检测体系具有较好的特异性,纯菌菌落灵敏度为6.1 × 102 CFU/mL。以浓度为N×105~N×101 CFU/mL的大肠杆菌或鼠伤寒沙门氏菌为干扰菌时,该体系对102 CFU/mL的SH检测结果无影响。人工污染SH的牛奶样品,经8 h培养,检测限达1.52 CFU/mL。该检测方法能快速、准确检测出食品中的SH,有利于在食品安全领域中的应用。

    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,2018,34(6):50-54,57.
ZHAILigong, GUOYuanxin, WANGJunying, et al. Mining of serotype specific genes and establishment of a PCR for detection Salmonella enterica serovar Heidelberg[J]. Food & Machinery,2018,34(6):50-54,57.

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  • 收稿日期:2018-01-18
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  • 在线发布日期: 2023-03-17
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