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Journal of dairy science v.100 no.2, 2017년, pp.961 - 969   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Development and application of a sensitive, rapid, and reliable immunomagnetic separation-PCR detection method for Cronobacter spp.

Chen, Qiming (College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, People's Republic of China ); Li, Yuanhong (College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, People's Republic of China ); Tao, Tingting (College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, People's Republic of China ); Bie, Xiaomei (College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, People's Republic of China ); Lu, Fengxia (College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, People's Republic of China ); Lu, Zhaoxin (College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, People's Republic of China );
  • 초록  

    ABSTRACT Cronobacter spp. have been linked to clinical cases of infection in both adults and infants. Enrichment of Cronobacter spp. before detection has been necessary but is quite time consuming. Hence, we sought to develop an immunomagnetic separation (IMS) PCR method that could shorten the time of enrichment before the detection of Cronobacter spp. The polyclonal antibody used in this immunomagnetic separation was prepared based on the outer membrane protein A of Cronobacter sakazakii China Center of Industrial Culture Collection 21560 and had high specificity to the target. The primers used in the IMS-PCR method also showed high specificity. The detection limit of IMS-PCR for pure C. sakazakii culture was 5.2 × 10 2 cfu/mL. Cronobacter sakazakii in artificially contaminated powdered infant formula (PIF) was also detected at a detection limit of 5.2 × 10 2 cfu/mL. After 8 h of enrichment, the detection limit in PIF was lower than 5.2 × 10 1 cfu/mL. An interference test using Escherichia coli in artificially contaminated PIF showed that the IMS-PCR method developed in this study had a good ability to resist interference. Finally, the IMS-PCR method was applied to the detection of Cronobacter in food samples and was shown to be reliable. Thus, this newly developed IMS-PCR detection method was quite sensitive, rapid, and reliable and could be applied to the detection of Cronobacter in foods.


  • 주제어

    immunomagnetic separation .   Cronobacter spp.   .   PCR .   polyclonal antibody.  

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