Microbiologics Expands its Line of Green Fluorescent Protein Marked Microbial Controls for Food Safety

St. Cloud, Minnesota, UNITED STATES

St. Cloud, Minnesota, USA, July 08, 2021 (GLOBE NEWSWIRE) -- Microbiologics announced the expansion of their UV-BioTAG™ line of microbial control strains containing green fluorescent protein (GFP) markers. Designed for food microbiology testing, UV-BioTAG™ control cultures visibly fluoresce under ultraviolet (UV) light, making them easily distinguishable from naturally occurring microflora and true contamination. Microbiologics, a global leader in the preservation, production and manipulation of biological materials, launched UV-BioTAG™ in 2016 to provide a simple yet effective tool for laboratories conducting analyses of food products.

Food manufacturers and processors are routinely testing samples to detect the presence of harmful pathogens such as Escherichia coli, Listeria monocytogenes and Salmonella enterica before products are distributed for consumption. Laboratories use positive control cultures in their Quality Control (QC) programs to ensure their test methods, materials and procedures are consistently producing accurate results. In some cases, food samples may inadvertently become cross-contaminated with the laboratory’s QC cultures during processing, leading to false-positive test results. If colonies are recovered from a food sample and they do not fluoresce under UV light, cross-contamination from UV-BioTAG control strains can be instantly ruled out as the cause.

Brad Goskowicz, Microbiologics Chief Executive Officer, commented, “Our UV-BioTAG strains allow laboratories to quickly and reliably differentiate QC cultures from contaminants. This is incredibly powerful for labs, as they have a very short window of time to identify pathogens and investigate a positive result.” The United States Department of Agriculture (USDA) Food Safety and Inspection Service (FSIS) recently cited the use of UV-BioTAG reference strains in their Microbiology Laboratory Guidebook (MLG) test method 5C.01 for the Detection, Isolation, and Identification of Top Seven Shiga Toxin-Producing Escherichia coli (STEC) from Meat Products and Carcass and Environmental Sponges.

The GFP reporter for UV-BioTAG strains is integrated into the microorganism’s chromosome to provide superior stability, particularly over plasmid-based reporters which may be lost during enrichments designed to recover pathogens from food. For each strain, the GFP reporter is controlled by a strong promoter for highly visible fluorescence and they are rigorously tested to ensure authenticity, stability and compatibility with common detection technologies. Microbiologics collaborated with the Food and Drug Administration (FDA) to choose the control strains that were developed into their UV-BioTAG product line. The list of new UV-BioTAG strains includes:


  • Salmonella enterica subsp. enterica serovar Abaetetuba
  • Salmonella enterica subsp. enterica serovar Bispebjerg
  • Salmonella enterica subsp. enterica serovar Tranoroa
  • Salmonella enterica subsp. enterica serovar Nottingham
  • Klebsiella aerogenes
  • Yersinia enterocolitica
  • Cronobacter sakazakii
  • Vibrio cholerae serovar O139


UV-BioTAG is available in two user-friendly formats. The UV-BioTAG Vial Kit includes six individual vials containing a single lyophilized microorganism pellet in each, which are rehydrated in a sterile fluid, such as saline, and then plated on culture media. The UV-BioTAG Swab Kit contains six all-in-one devices featuring a lyophilized microorganism pellet, ampoule of rehydration fluid and a swab, which allows for direct inoculation of culture media. Microbiologics will be showcasing UV-BioTAG at the International Association for Food Protection (IAFP) Annual Meeting in Phoenix, Arizona, July 18 - 21, 2021. Learn more at Microbiologics.com/UV-BioTAG.

About Microbiologics: Microbiologics is the foremost biological products and services provider, focused on protecting the health and safety of people around the world. For over 50 years, they have been partnering with healthcare and life science laboratories, manufacturers and suppliers across the globe to co-create and provide biological control materials, assay services and consulting for microbiology, molecular diagnostics and virology. Headquartered in Saint Cloud, Minnesota, the company has additional facilities in California, Kentucky and Michigan. Microbiologics has advanced industry standards for biological controls by adopting the most rigorous testing and quality standards including ISO 13485, ISO/IEC 17025, and ISO 17034. The company has an extensive distribution network spanning over 150 countries. For more information, visit microbiologics.com.


Microbiologics UV-BioTAG microbial controls visibly fluoresce under ultraviolet light so they are easy to distinguish from true contaminants. Designed for food quality control, Microbiologics UV-BioTAG qualitative lyophilized microorganism pellets are offered in two packaging options - vials or swabs.