کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6288375 | 1616242 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Variable tellurite resistance profiles of clinically-relevant Shiga toxin-producing Escherichia coli (STEC) influence their recovery from foodstuffs
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کلمات کلیدی
CFULEEPotassium telluriteMICSTXEAEUPGMAShiga toxin-producing E. coliRBASTECPCA - PCATbx - TBXMinimal inhibitory concentration - حداقل غلظت مهار کنندهSelective media - رسانه های انتخابیunweighted pair group method with arithmetic mean - روش جفت گروه بدون وزن با میانگین ریاضیPlate Count Agar - شمارش آگارLocus of enterocyte effacement - محل انسداد انتروسیتTellurite resistance - مقاومت تلوریتیFoodstuff - مواد غذاییNle - نالهcolony-forming units - واحدهای تشکیل دهنده کلنیCdS - کادمیم سولفید، سولفید کادمیمCoding DNA Sequence - کدگذاری دنباله DNA
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش تغذیه
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Tellurite (Tel)-amended selective media and resistance (Tel-R) are widely used for detecting Shiga toxin-producing Escherichia coli (STEC) from foodstuffs. Tel-R of 81 O157 and non-O157 STEC strains isolated from animal, food and human was thus investigated. Variations of STEC tellurite minimal inhibitory concentration (MIC) values have been observed and suggest a multifactorial and variable tellurite resistome between strains. Some clinically-relevant STEC were found highly susceptible and could not be recovered using a tellurite-based detection scheme. The ter operon was highly prevalent among highly Tel-R STEC but was not always detected among intermediately-resistant strains. Many STEC serogroup strains were found to harbor sublines showing a gradient of MIC values. These Tel-R sublines showed statistically significant log negative correlations with increasing tellurite concentration. Whatever the tellurite concentration, the highest number of resistant sublines was observed for STEC belonging to the O26 serogroup. Variations in the number of these Tel-R sublines could explain the poor recovery of some STEC serogroups on tellurite-amended media especially from food products with low levels of contamination. Comparison of tellurite MIC values and distribution of virulence-related genes showed Tel-R and virulence to be related.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Microbiology - Volume 59, October 2016, Pages 32-42
Journal: Food Microbiology - Volume 59, October 2016, Pages 32-42
نویسندگان
Stéphane Kerangart, Thomas Douëllou, Sabine Delannoy, Patrick Fach, Lothar Beutin, Delphine Sergentet-Thévenot, Benoit Cournoyer, Estelle Loukiadis,