Surveillance on the food contamination with listeria monocytogens in Shunyi.

[Objective]To investigate food contamination with listeria monocytogens in Shunyi,so as to provide guide for constituting preventive and remedial measure.[Methods]According to national standard methods,a total of 1 271 samples of foods(raw meat,cooked meat,aquatic product,vegetable and salad)were examined for the presence of listeria monocytogens.[Results]19 isolated strains were obtained from 1 271 samples,and the Presence of listeria monocytogens was 1.49%.The most frequently contaminated foods were raw meats(7.87%),followed by cooked meats(1.74%)and vegetables(0.64%),the strain was not found in aquatic products and salads.[Conclusion]Foods in Shunyi are contaminated by listeria monocytogens,particularly in raw meats and cooked meats.