Hygiena new formulation selects Listeria from non-Listeria more selective for target species

By Jenny Eagle contact

- Last updated on GMT

Pic: iStock
Pic: iStock

Related tags: Listeria, deli meat, Cheese

Hygiena food safety has launched InSite Listeria, a reformulated easy-to-use, all-in-one, test for Listeria species, which has been certified by AOAC RI, which verifies the test detects low levels of Listeria species on stainless steel, ceramic and plastic surfaces.

Each InSite Listeria​ device contains liquid media pre-measured with antibiotics, growth enhancers, and color-changing compounds specific to Listeria ​spp.​ 

Food safety

InSite Listeria (chromo)_Swab_Hand

The test is a self-contained swab device with selective growth medium that inhibits most non-Listeria microorganisms and provides nutrients to support Listeria growth so it can be measured easily and quickly. Darkening of media to grey/black after 24-48 hours at 37°C indicates a presumptive positive result for Listeria spp.

The test is used for environmental monitoring in food processing facilities, food preparation environments and food retailers after cleaning. Screening out negative samples quickly and provides a cost-effective way to increase surveillance, monitor hazards and control risks.

Food safety professionals have been looking for more convenient, cost-effective ways to detect Listeria, and we are excited about being able to fill that gap with InSite Listeria,​” said Brandon Katz, research and development manager, Hygiena.

The improved specificity of this new test will also make detecting the possible presence of Listeria a much simpler process​.”

Listeria

The new Insite Listeria​ testing method is self-enclosed, without the need for complex laboratory equipment, or additional reagents, reducing sample cross-contamination risks.

Deli meat

According to Andrew Porterfield, marketing & communications specialist, Hygiena, it can be used on virtually any food type that potentially could harbor Listeria such as prepared foods like deli meats and cheeses, raw fruits, sprouts, cantaloupe and ice cream.

Additional testing by Hygiena scientists shows InSite Listeria ​can more specifically detect presumed positive Listeria​, excluding more non-Listeria​ species than previous tests. This specificity reduces the need for follow-up testing, further reducing the risks of extended product hold times.

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