LISTERIA-MONOCYTOGENES IN WURSTEL SOLD IN ITALY IN 1990

The presence of Listeria monocytogenes, both on the surface and in the core of a large number of wurstel's samples, suggests that the microorganism is present in the meat emulsions and that it is not destroyed by heat process. Pasteurization following packaging is able to reclaim product's surface, but it has not efficacy when L. monocytogenes is present in the core. L. monocytogenes was not present in many samples of wurstel examined in a second time of the research (six months after the first trial of analysis); this fact may be related to improvements on process parameters carried out in order to get safety of products.