It is possible to collect samples from production lines or sites that have not been recently cleaned. Sample location and application of N-Light™ Listeria spp. should be categorized as follows:
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Food or dirt residue exposed surfaces within the production or before cleaning
Samples taken from production lines (both during and after production) and other places in the facility that are regularly cleaned are well within the capacity of our test. Make sure not to overload the sample with food residues. Rather go into niches and cavities of machines and apply pressure on surfaces. Sampling more “dirt” is not necessarily useful as persistent Listeria on equipment or infrastructure should be detected. -
Direct sampling of food or in places of high dirt / food residue concentration
Meticulous sampling is required to ensure no test tube overload. Do not directly collect food residues. Examples of high load sampling spots are uncleaned drains, smeared water tanks, or the inside of uncleaned food residue collection containers.
