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Food microbiology testing is crucial for ensuring the safety and quality of products, thereby securing consumer trust. Every food quality program should include measures to control microbiological contaminants and mitigate contamination risks.
We understand that accurate and timely data are crucial for verifying the effectiveness of safety systems against bacterial pathogens. Our global network ensures a rapid turnaround for food laboratory testing once samples arrive at our accredited labs. We offer comprehensive analytical services for all types of microorganisms and food matrices.
Our experts are dedicated to protecting consumers by:
Our experts and our network of laboratories are providing a large range of technical solutions to help you anticipate, identify, and reduce contamination in your products.

In case you are facing a positive result for contamination, you can identify the type of strain responsible for the contamination, which will help conduct an efficient root-cause analysis. We offer strain differentiation and organism typing services, including:
Our laboratories and molecular teams can support your identification needs using the MALDI-TOF mass spectrometry system, PFGE, MLST, Vitek-MS, and Sanger Sequencing capabilities to accurately identify the specific type of pathogen present, providing valuable information for effective treatment and prevention measures.
Microbial identification involves analyzing genetic material to determine unique ribosomal DNA patterns and comparing them to known databases. Our ribotyping services are reliable, efficient, and essential for many applications.
Our Whole Genome Sequencing (WGS) method allows for the precise analysis of an organism’s genetic makeup, enabling accurate identification of strains and species. You can have confidence in the accuracy and reliability of their microbial identification results.
Our team of consultants can perform a root-cause analysis to help you figure out where the contamination comes from, understand if there is a risk of it being recurrent and how to mitigate it with effective cleaning or other types of action.
Contaminations often come from the manufacturing environment: even with stringent cleaning practices, unexpected spots can become sources of contamination.

Through training and consulting, our team can assist you in establishing a well-considered Environmental Monitoring Program, your frontline defense against product safety failures. Our specific tool ENVIROMAP®
is supporting hundreds of food manufacturers in managing the risks in their production environment and facilitating the day-to-day management of quality controls.
Microorganisms come in various types, and the analytical approach varies based on what you’re searching for.
Bacteria and toxins are the most commonly tested microorganisms. Our full range of microbiological detection methods enables you to guarantee the quality of your food products by ensuring they are pathogen-free.
Our recognized expertise in industrial microorganism testing can help you control quality and safety at different stages of product development.
The risk of contamination associated with the presence of viruses in foods represents an emerging issue for the food industry. Mérieux NutriSciences helps you prevent such outbreaks with laboratory analyses for the detection of Norovirus G1/G2 and Hepatitis A viruses in food.
Foodborne viruses are a common cause of gastroenteritis. Food may be contaminated by infected food handlers or by contact with contaminated water. The most frequent source of foodborne viral illness is the consumption of molluscan shellfish, raw fruits, and vegetables.
Mérieux NutriSciences offers advanced RT-PCR testing methods to enable fast and accurate detection of food-borne viruses. Our real-time RT PCR-based technique is highly sensitive, specific, reliable, and fast, complying with ISO protocols.
Beyond our analytical solutions, discover how we can support all your Food Safety and Quality Management challenges.
At Mérieux Nutrisciences, we leverage over 50 years of scientific and entrepreneurial expertise to address the needs of the food industry, a journey that began with Microbiology!
Our story begins with food and an invisible threat: Salmonella. When our founder, Dr. John H. Silliker, started his first laboratory in Chicago in 1967, who would have known that he would become a preeminent figure in the fight against Salmonella and food safety?
Building on his long-lasting curiosity for this complex microorganism and his entrepreneurial vision, he turned his two-floor laboratory into the largest independent food testing and consulting network worldwide.

Frequently Asked Questions (FAQ) about Food Microbiology Testing
Food microbiology testing involves analyzing food samples to detect and identify microorganisms such as bacteria, viruses, molds, and yeasts that could compromise food safety or quality. These analyses help ensure that food products are free from harmful pathogens and comply with food safety regulations.
Microbiological testing is essential for verifying the effectiveness of food safety and quality control programs. It helps detect contamination in raw materials, manufacturing environments, and finished products, thereby protecting consumers and preventing costly recalls or brand reputation damage.
Mérieux NutriSciences tests a wide range of microorganisms, including:
– Pathogenic bacteria such as Listeria monocytogenes, Salmonella, E. coli STEC, Campylobacter, and Staphylococcus aureus
– Indicator microorganisms like acid-resistant or heat-resistant bacteria
– Industrial microorganisms such as Lactobacillus and Bifidobacteria
– Foodborne viruses including Norovirus G1/G2 and Hepatitis A
Depending on the sample type and risk level, Mérieux NutriSciences uses both cultural methods and rapid molecular methods (like RT-PCR or Whole Genome Sequencing). These approaches ensure fast, accurate, and reliable detection and identification of microorganisms.
Whole Genome Sequencing (WGS) provides a complete analysis of a microorganism’s genetic material, allowing for precise identification of bacterial strains. It’s particularly useful for tracking contamination sources, studying outbreaks, and preventing recurrence.
When a contamination is confirmed, Mérieux NutriSciences conducts strain identification and root-cause analysis to determine the origin of the issue. The company’s consultants provide recommendations to prevent recurrence, such as improving cleaning procedures or production layouts.
The company offers Environmental Monitoring Programs and digital tools like EnviroMap, which help manufacturers track hygiene indicators, manage sampling plans, and quickly identify potential contamination sources in production environments.
Yes. All Mérieux NutriSciences laboratories operate under strict ISO accreditation and follow international standards including ISO, FDA, AOAC, APHA, AFNOR, and USDA protocols, ensuring data reliability and compliance with regulatory requirements.
Absolutely. Shelf-life studies are part of their microbiological and analytical services. They assess how microorganisms evolve over time in food products to determine safe consumption periods and storage conditions.
With over 50 years of experience and a global network of accredited laboratories, Mérieux NutriSciences provides reliable, fast, and expert-driven analytical solutions. Their scientific heritage—rooted in the pioneering work of Dr. John H. Silliker—makes them a trusted partner for ensuring food safety worldwide.

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