| Abstrakt: |
The objective of the present study was to investigate the incidence and contamination levels of different Listeria monocytogenesserovars in ready-to-eat meat products (RTE-MP) collected from different outlets and processing plants in Jordan in order (i) to provide information to Jordanian health authorities on the incidence of L. monocytogenesin RTE-MP sold and consumed in Jordan and (ii) to ascertain the risks of these products for consumers. Two hundred forty RTE-MP samples, 120 beef and 120 poultry, were analyzed. European International Organization for Standardization (EN ISO) 11290-1 and -2 standard protocols were used for detection and enumeration of L. monocytogenes.The identity of suspected L. monocytogeneswas confirmed using PCR. Three Listeriaspp., L. monocytogenes, L. innocua,and L. welshimeri,were isolated. L. innocuaand L. welshimeriwere the most and least frequently isolated with 56 and 36 samples, respectively. L. monocytogeneswas isolated from 41 samples (17.1%): 23 from beef and 18 from poultry samples. The contamination levels of L. monocytogeneswere ≤100 CFU/ g in 97.5% (40 samples) of the positive samples. Only one beef sample with a count of >100 CFU/g was found. The L. monocytogenesstrains isolated fell into two serotypes (1 and 4) and four different serovars (1/2a, 1/2b, 1/2c, and 4b). |
