Compact Dry LM | Listeria monocytogenes

Compact Dry LM plates give you a fast, reliable way to confirm Listeria monocytogenes in food and environmental samples. Each pre-sterilized dish is infused with selective agents and chromogens. Target colonies develop as red colonies, other Listeria appear blue/green, and background flora are suppressed, making interpretation clear. Compact Dry LM streamlines Listeria testing—delivering easy-to-read results that keep HACCP programs on schedule and products safe. Key Benefits MicroVal-validated – proven equivalent to ISO 11290-1/-2 across a broad range of foods, giving auditors and regulators confidence. Distinct chromogenic read-out – red/blue-halo colonies eliminate gas-tube or latex confirmation for routine release. Ambient-stable & stackable – store at 1 – 30 °C; slim profile maximizes incubator space. Versatile QA coverage – ideal for in-process and finished-product checks in dairy, meat, produce, seafood, bakery, and ready-to-eat facilities. Incubation Parameters Step Temperature Time Pre-enrichment (Half-Fraser) 30 ± 1 °C 25 ± 1 h Plate incubation 37 ± 1 °C 24 ± 2 h pH tip: Adjust the product (or 1 : 10 dilution) to pH 6 – 7 with 0.1 – 1 N NaOH (acidic) or HCl (alkaline) for optimal colony development. Performance Countable range: 1 – 300 CFU per plate (1 mL inoculum).