PREVALENCE OF LISTERIA MONOCYTOGENES IN MEAT AND MEAT PRODUCTS WITH SPECIAL REFERENCE TO ITS SURVIVAL IN FROZEN AND REFRIGERATED GROUND BEEF

HEFNAWY, Y.

doi:10.21608/avmj.1989.188677

PREVALENCE OF LISTERIA MONOCYTOGENES IN MEAT AND MEAT PRODUCTS WITH SPECIAL REFERENCE TO ITS SURVIVAL IN FROZEN AND REFRIGERATED GROUND BEEF

Document Type : Research article

Author

Y. HEFNAWY

10.21608/avmj.1989.188677

Abstract

Meat and meat products (100 samples) were assayed for the presence of Listeria monocytogenes, using different enrichment procedures and selective plating media. The organism failed to be detected in the examined samples. The ability of two strains of L.monocytogenes to grow and survive in ground beef stored at 4 and -18°C was studied. L.monocytogenes strains V, and Scott A were not affected by storage of ground beef samples at 4°C for 6 days and noticable changes in odour and general appearance occurred in all samples. After 7 weeks of storage at -18°C L. monocytogenes counts decreased by about 2.2 logs in frozen ground beef although they were still detectable after this time. Studies are needed to determine the effectiveness of methods originally developed for the isolation of L.monocytogen es from meat and its products.