کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5541977 | 1402513 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multiplex PCR coupled with propidium monoazide for the detection of viable Cronobacter sakazakii, Bacillus cereus, and Salmonella spp. in milk and milk products
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Multiplex PCR coupled with propidium monoazide for the detection of viable Cronobacter sakazakii, Bacillus cereus, and Salmonella spp. in milk and milk products Multiplex PCR coupled with propidium monoazide for the detection of viable Cronobacter sakazakii, Bacillus cereus, and Salmonella spp. in milk and milk products](/preview/png/5541977.png)
چکیده انگلیسی
Cronobacter sakazakii, Bacillus cereus, and Salmonella spp. are common food-borne pathogens. The aim of this study was to develop a sensitive, specific, and rapid method for the simultaneous detection of these 3 pathogens in milk and milk products. Three specific primers were designed based on ompA, invA, and cesB of C. sakazakii, Salmonella spp. and B. cereus, respectively, for use in a multiplex PCR (mPCR). To eliminate false-positive results, cells were pretreated with propidium monoazide (PMA) for the selective elimination of the genomic DNA of dead cells. An internal amplification control was applied as an indicator of false-negative results from the interference of inhibitors in the food matrix. Results showed that, in pure culture, the limits of detection of the assay for C. sakazakii, Salmonella Enteritidis, and B. cereus were 9.5 Ã 104, 7.4 Ã 102, and 7.5 Ã 102 cfu/mL, respectively. Moreover, 8 cfu/mL of viable B. cereus cells were detected after 5 h of enrichment, and 9 cfu/mL of viable C. sakazakii and 7 cfu/mL of Salmonella Enteritidis were detected after 7 h of enrichment in spiked pure milk, walnut peanut milk, and whole-wheat milk. To validate the PMA-mPCR assay, the PMA-mPCR assay and the traditional culture method were performed to detect the 3 bacterial strains in 1,165 milk product samples. The PMA-mPCR assay obtained the same results as the culture-based method. Results demonstrated that the PMA-mPCR assay has excellent sensitivity and specificity for the simultaneous detection of viable C. sakazakii, Salmonella Enteritidis, and B. cereus in milk and milk products.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 100, Issue 10, October 2017, Pages 7874-7882
Journal: Journal of Dairy Science - Volume 100, Issue 10, October 2017, Pages 7874-7882
نویسندگان
Shuang Yu, Leina Yan, Xin Wu, Fan Li, Dong Wang, Hengyi Xu,