Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2009.1491.1497Listeria monocytogenes and Other Listeria sp. Contamination in Different Common Ready-to-Eat Food Products in Jordan]]>AwaishehS. S.1220091223Incidence 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.]]>Awaisheh, S.S. and S.A. Ibrahim,2009611251132Blais, B.W., L.M. Phillippe, F. Pagotto and N. Corneau,2002Listeria monocytogenes from foods and environmental samples by the polymerase chain reaction (PCR).]]>2002Center for Food Safety and Applied Nutrition (CFSAN), 2000Listeria Risk Assessment.]]>Codex Alimentarius Commission (CAC),20072007European Food Safety Authority (EFSA),2007Listeria monocytogenes risk related to ready to eat foods and scientific advice on different levels of Listeria monocytogenes in ready to eat foods and the related risk for human illness.]]>599142Farber, J.M. and P.I. Peterkin,1991Listeria monocytogenes, a foodborne pathogen.]]>55476511Fleming, D.W., S.L. Cochi, K.L. Mac-Donald, J. Brondum and P.S. Hayes et al.,1985312404407Francois, K., F. Devlieghere, A.R. Standaert, A.H. Geeraerd, J.F. Van Impe and J. Deevere,2006w) on the individual cell lag phase and generation time of Listeria monocytogenes.]]>108326335Garrido, V., A.I. Vitas and E.I. Garcia-Jalon,2009Listeria monocytogenes in ready-to-eat products: Prevalence by brands and retail establishments for exposure assessment of listeriosis in Northern Spain.]]>20986991Gouws, P.A. and I. Liedemanne,2005Listeria monocytogenes in food products.]]>43201205Guerra, M.M., J. McLauchlin and F.A. Bernardo,2001Listeria in ready-to-eat and unprocessed food produced in Portugal.]]>18423429Hitchins, A.D.,1996307185International Standard Organization (EN ISO). 1997Listeria monocytogenes- Part 1: Detection method.]]>1997International Standard Organization (EN ISO),1998Listeria monocytogenes. Part 2: Enumeration method.]]>1998Linnan, M.J., L. Mascola, X.D. Lou, V. Goulet and S. May et al.,1988319823828McLauchlin, J.,19967187193Meloni, D., P. Galluzzo, A. Mureddu, F. Piras, M. Griffiths and R. Mazzette,2008Listeria monocytogenes in RTE foods marketed in Italy: Prevalence and automated EcoRI ribotyping of the isolates]]>129166173Norrung, B.,2000Listeria monocytogenes in foods under special consideration of risk assessment approaches.]]>62217221Pintado, C.M.B.D., A. Oliveira, M.E. Pampulha and M.A.S.S. Ferreira,2005227985Reissbrodt, R.,2004Listeria spp. An overview.]]>9519Rocourt, J., P. Ben-Embarek, H. Toyofuku and J. Schlundt,2003Listeria monocytogenes in ready-to-eat foods, the FAO/WHO approach.]]>35263267Schlech, W.F.,200031770775Seeliger, H. and K. Hohne,1979Listeria Monocytogenes and Related Species.]]>1979pp: 31-49pp: 31-49Vitas, A.I. and V.A. Garcia-Jalon,2004Listeria monocytogenes in fresh and processed foods in Navarra (Spain).]]>90349356European Commission Regulation (EC) No. 1441,2007L 2331229