Evaluation of a rapid molecular method for detection of Listeria monocytogenes
نویسنده
چکیده
The present study was carried out to know the lowest detection limit of Listeria monocytogenes by PCR. The quantification of organisms was done by CFU counting from ten fold serial dilution and PCR amplification of inlA gene fragment was performed from each dilution. The PCR could detect as low as 20 organisms indicating the lowest PCR detection limit. Thus, lowest number of L. monocytogenes detectable by PCR is a low-cost and rapid procedure that can be appropriated for the detection in real time of low L. monocytogenes levels in naturally contaminated food and is suitable to implement in the food industry.
منابع مشابه
Presenting a rapid method for detection of Bacillus cereus, Listeria monocytogenes and Campylobacter jejuni in food samples
Objective(s): Listeria monocytogens, Bacillus cereus and Campylobacter jejuni are three toxin producing bacteria over the world, especially in Iran, and it is essential to find a certain, rapid procedure to identify these microorganisms. In this research, these bacteria were simultaneously detected by multiplex PCR technique in foods. Materials and Methods: The primary approval of bacterial str...
متن کاملRapid quantitative detection of Listeria monocytogenes in chicken using direct and combined enrichment/qPCR method
Listeria monocytogenes is a species of foodborne pathogen often related to foods, such as poultry, ready-to-eat products, fruits, and vegetables. The culture method is a standard procedure for the detection of bacteria in food products. The real-time quantitative PCR (qPCR) technique can be used for the quantification of foodborne pathogens. The current research was aimed to assess...
متن کاملImportance of Listeria monocytogenes in food safety: a review of its prevalence, detection, and antibiotic resistance
Listeria monocytogenes, as a foodborne pathogenic bacterium, is considered as major causative agent responsible for serious diseases in both humans and animals. Milk and dairy products are among the main sources of energy supply in the human, therefore contamination of these products with Listeria spp., especially L. monocytogenes, could lead to life threatening infec...
متن کاملIncreased detection of Listeria species and Listeria monocytogenes in raw beef, using the Assurance GDS molecular detection system with culture isolation.
Testing for Listeria is challenging because of its slow growth rate. Recently, we described a rapid Listeria culture isolation method. This method can be improved by utilizing a rapid molecular detection test such as the Assurance GDS tests for Listeria and Listeria monocytogenes. These two methods (culture isolation and Assurance GDS) use different enrichment strategies that may affect the num...
متن کاملشناسایی لیستریا مونوسیتوژنز در شیر توسط واکنش زنجیره ای پلی مراز
Background: Listeria monocytogenes may be the cause of meningitis and sepsis. It is transmitted via food products. Precise detection of this organism would undoubtedly play a significant role in prevention of this infection. Materials and methods: Polymerase chain reaction method was developed for detection of Listeria monocytogenes in milk samples after enrichment culture. It consists of cult...
متن کامل