Imagine a crime scene. Not for a burglar, but for an invisible killer: Listeria monocytogenes or Salmonella. The "weapon" is contamination. The "scene" is a stainless steel conveyor belt in a cheese factory or the inside of a slaughterhouse truck.
the definitive international standard for surface sampling in food and animal feed environments , essential for detecting and counting microorganisms like Salmonella rapidmicrobiology The latest version, ISO 18593:2018
Microbiology of food and animal feeding stuffs - ISO 18593:2004
ISO 18593, titled "Microbiology of the food chain — Horizontal methods for surface sampling," specifies the methods used to detect or enumerate viable microorganisms on surfaces in the food chain environment. This includes everything from the slaughterhouse floor to the commercial kitchen counter. Primary Objectives
Contact Plates: Best for flat, smooth surfaces. These agar-filled plates are pressed directly onto a surface to "capture" microbes.
The choice of sampling method often depends on the type and size of the surface being tested:
In environments where disinfectant residues are expected, appropriate neutralizers must be added to the diluent or media to prevent false negatives caused by inhibited microbial growth. Sampling Time:
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