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Detection and frequency of Cronobacter spp. (Enterobacter sakazakii) in different categories of ready-to-eat foods other than infant formula. | LitMetric

Detection and frequency of Cronobacter spp. (Enterobacter sakazakii) in different categories of ready-to-eat foods other than infant formula.

Int J Food Microbiol

Federal Office of Public Health, Section of Microbiological and Biotechnological Risks, 3003 Bern, Switzerland.

Published: December 2009

AI Article Synopsis

Article Abstract

Two hundred sixty eight samples of ready-to-eat foods from retail shops were screened for the presence of Cronobacter by selective enrichment followed by plating on three chromogenic agars (ESIA, ESPM and DFI). Cronobacter was isolated from 14/23 samples of sprouts and fresh herbs/salads (60.9%), 7/26 samples of spices and dried herbs (26.9%) and 3/42 confectionery samples (7.1%). In cases where repeat samples were available, foods positive for Cronobacter were retested twice. In total, 54 Cronobacter isolates from 24 foods were recovered and genetic fingerprint patterns generated using PFGE. Identical PFGE-profiles were generated for Cronobacter isolates from five samples of two confectionery products obtained from a particular bakery shop over a period of 11 months. This may indicate a persistent contamination of the production site. For all other isolates, no clustering by phylogenetic analysis of PFGE-profiles was observed, indicating the sporadic nature of Cronobacter in ready-to-eat foods. Enterobacterial counts varied from a maximum value of 2.9 x 10(7) CFU/g (in dill) to a minimum value of <10 CFU/g (in confectionery and dried herbs/spices). There was no correlation between Enterobacterial count and the presence of Cronobacter. Cronobacter may be regularly imported into private households via ready-to-eat foods.

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Source
http://dx.doi.org/10.1016/j.ijfoodmicro.2009.04.009DOI Listing

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