Prevalence, genetic diversity and antimicrobial susceptibility of Listeria monocytogenes isolated from open-air food markets in Greece

Filiousis, George; Johansson, Anders; Frey, Joachim; Perreten, Vincent (2009). Prevalence, genetic diversity and antimicrobial susceptibility of Listeria monocytogenes isolated from open-air food markets in Greece. Food Control, 20(3), pp. 314-317. Elsevier 10.1016/j.foodcont.2008.05.018

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A total of 210 food samples originating from milk products, ready-to-eat salads, raw meat and raw meat products purchased in ten open-air market places in Thessaloniki, Greece, were analyzed for the presence of Listeria monocytogenes. Thirty (14.3%) contained L. monocytogenes with the highest prevalence in raw meat (27.5%), raw meat products (18%) and cheese (8%). The strains were susceptible to 16 antimicrobials as determined by microbroth dilution, except one strain which displayed resistance to tetracycline (MIC > 32 μg/ml). This strain carried the tetracycline resistance gene tet(M). Pulsed-field gel electrophoresis (PFGE) revealed a low genetic diversity among the isolates, irrespective of their origin. This suggests that dominant L. monocytogenes clones are widespread in different food product types in open-air food markets in Greece. The high prevalence of L. monocytogenes in these products indicates that appropriate hygienic measures and periodic bacteriological controls are also necessary in open-air food markets to reduce contamination with food-borne pathogens. Greek specialties made with raw meat and raw milk may contain L. monocytogenes and should not be consumed by persons at risk.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Veterinary Bacteriology > Molecular Bacterial Epidemiology and Infectiology
05 Veterinary Medicine > Research Foci > Host-Pathogen Interaction
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP)
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Veterinary Bacteriology

UniBE Contributor:

Johansson, Anders; Frey, Joachim and Perreten, Vincent

Subjects:

600 Technology > 630 Agriculture
500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0956-7135

Publisher:

Elsevier

Language:

English

Submitter:

Vincent Perreten

Date Deposited:

06 Feb 2015 09:50

Last Modified:

08 Feb 2017 14:40

Publisher DOI:

10.1016/j.foodcont.2008.05.018

BORIS DOI:

10.7892/boris.62545

URI:

https://boris.unibe.ch/id/eprint/62545

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