Development of a PCR-TTGE assay for rapid detection of Staphylococcus species in processed meat products
Author(s):
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Some Staphylococcus species are believed to be the main cause of bacterial infections and foodborne outbreaks. Several reports have discussed the enterotoxigenic properties of some Staphylococcus species, but due to the shortage of efficient diagnostic techniques, most studies have focused only on Staphylococcus aureus. Thus, developing a culture-independent, selective, and rapid detection method for Staphylococcus species in food products is of great importance. In this study, PCR-amplified tuf gene sequences were assessed by temporal temperature gradient gel electrophoresis (TTGE) in order to detect and differentiate between different Staphylococcus species in Iranian food samples. The PCR sensitivity and specificity were evaluated against DNA samples extracted from six Staphylococcus species, including S. aureus, S. epidermidis, S. saprophyticus, S. intermedius, S. chromogenes, and S. hominis, using a commercially available kit and a cost-effective, rapid, non-commercial boiling method. Using the boiling method, the sensitivity of the tuf PCR was 9 × 101 CFU/mL for the salami samples spiked with S. aureus, ten times less sensitive than the commercial kit. After optimizing the TTGE conditions, a species-specific TTGE pattern was obtained based on the differences between the amplified sequences from various species. This TTGE pattern was applied to detect Staphylococcus species in food samples from the market. The presence of Staphylococcus species was confirmed in 6 out of 10 tested salami products. The results demonstrate that the PCR-TTGE method is an alternative method that may be specific and sensitive enough to assess the presence of possible Staphylococcus contamination in meat processed food samples. More studies using different food samples should be considered for an in-depth analysis of bacterial contamination.
Keywords:
Language:
English
Published:
Advanced Research in Microbial Metabolite and Technology, Volume:4 Issue: 1, Winter-Spring 2021
Pages:
13 to 23
magiran.com/p2539054
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 990,000ريال میتوانید 60 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 60 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!