The Medical Wire Isolation® range offers an easy to use and interpret method for environmental testing. Simple colour change interpretation Room temperature storage prior to use Cost effective screening tool for many environments such as ingredient, food or beverage production areas, or other food handling surfaces Simply select the desired swab from the range (Hygiene, Listeria, Salmonella & Coliforms) swab a 10cm x 10cm surface, incubate at the correct temperature and read the swab for any color change. This color change indicates the presence of the microbe. Listeria Transwab An indicator swab to detect the presence of Listeria on food production surfaces. Medium changes from yellow / brown to black in the presence of Listeria spp Result available within 48 hours For a quote on bulk purchases or to enquire Salmonella or Coliform Transwab, please contact us here