Liha töötlemine
been suspected. 4b. Listeria is a psychrotroph capable of
Isolation of this organism typically goes growing at temperatures as low as 2.5°C and
through an enrichment step using nutrient as high as 44°C. Because dairy products have
broth or Rappaport broth and then through a been implicated in outbreaks of listeriosis,
plating medium using an enteric agar (SS, much research has been directed toward
XLD, DCL, etc). The CIN agar (cefsulodin- cheese and milk products. The organism has
irgasan-novobiocin agar) is commercially been found to survive the processing of
available for the isolation of this pathogen; cottage cheese, cheddar cheese, and Colby
however many other organisms, such as cheese. A question of great concern is
Salmonella and Serratia, also grow on this whether L. monocytogenes can survive the
agar
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