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Pakistan Journal of Biological Sciences
  Year: 2009 | Volume: 12 | Issue: 23 | Page No.: 1491-1497
DOI: 10.3923/pjbs.2009.1491.1497
 
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Survey of Listeria monocytogenes and Other Listeria sp. Contamination in Different Common Ready-to-Eat Food Products in Jordan

S.S. Awaisheh

Abstract:
Incidence and contamination levels of different Listeria monocytogenes serovars and different Listeria sp. in 360 samples of common ready-to-eat food products in Jordan were investigated. The presence of L. monocytogenes was determined using EN ISO protocol and confirmed using PCR technique. Five Listeria sp.: L. monocytogenes, L. innocua, L. ivanovvi, L. welshimeri and L. seeligeri were isolated. L. monocytogenes was isolated from 19 samples (5.3%), from 6 RTE dairy samples; 6 RTE vegetables samples and 4 traditional dishes samples and 3 miscellaneous samples. L. innocua and L. ivanovvi were the most and least frequently isolated species, 24 and 3 samples, respectively. L. welshimeri was isolated from 8 samples and L. seeligeri from 7 samples. The contamination levels of L. monocytogenes were found to be ≤100 CFU g-1 in 84.2% (16 samples) of the positive samples. Only 15.8% (3 samples; 1 vegetable, 1 traditional dish and 1 miscellaneous samples) of the positive samples were found with counts >100 CFU g-1. L. monocytogenes strains isolated fell into 2 serotype, 1 and 4 and to 5 different serovars, 1/2a, 1/2b, 1/2c, 4a, 4c.
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How to cite this article:

S.S. Awaisheh , 2009. Survey of Listeria monocytogenes and Other Listeria sp. Contamination in Different Common Ready-to-Eat Food Products in Jordan. Pakistan Journal of Biological Sciences, 12: 1491-1497.

DOI: 10.3923/pjbs.2009.1491.1497

URL: https://scialert.net/abstract/?doi=pjbs.2009.1491.1497

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