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Prevalence of Listeria spp. and characterization of Listeria monocytogenes isolated from food products in Tetouan, Morocco

 Prevalence of Listeria spp. and characterization of Listeria monocytogenes isolated from food products in Tetouan, Morocco

Intitulé de l'article Prevalence of Listeria spp. and characterization of Listeria monocytogenes isolated from food products in Tetouan, Morocco
Revue

 

Food Control

Volume 84,, Pages 436-441

Date de publication February 2018
Auteurs

Laboratory of Biology and Health, Department of Biology, Faculty of Sciences of Tetouan, Abd Al Malek Essaadi University, Morocco

Institut Pasteur, Biology of Infection Unit, INSERM U1117, World Health Organization Collaborating Centre and National Reference CentreListeria, Paris, France

Gastrolab, Research Group in Food Sciences Based on the Evidence and Experimentation, Institute of Material Science, Scientific Park, University of Valencia, Paterna, Spain

Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Medical Research Institute Hospital La Fe, Valencia, Spain

Regional Analysis Laboratory and Research ONSSA, Tangier, Morocco

Paris Descartes University, Necker-Enfants Malades University Hospital, Division of Infectious Diseases and Tropical Medicine, Paris, France

Abstract A total of 1096 food samples were purchased in Tetouan, North-Western of Morocco, to examine the presence of Listeria spp. Eighty (7.3%) of the tested samples were found positive for the presence ofListeriaspp., whileL. monocytogeneswas detected in 16 (1.5%) samples.L. monocytogenes isolates belonged to clonal complexes CC2 (PCR serogroup IVb) and CC199 (PCR serogroup IIa) and to 8 different combinedAscI/ApaIpulsed-field gel electrophoresisprofiles. Core genomemultilocus sequence typing(cgMLST) allowed to distinguish 12 different cgMLST types and revealed the presence of 3 clusters of closely-related isolates from different samples, suggesting the existence of common sources of contamination. Isolates showed no resistance to the referenceantibioticsused for the treatment of listeriosis. This study underlines the circulation ofL. monocytogenesstrains of clonal complex CC2 in Morocco and highlights the importance of microbiological surveillance in order to minimize consumers’ exposure to this foodborne pathogen.
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