A study of imported unprepared whole lettuces sampled from supermarkets, greengrocers, shops, and market stalls found that all were of acceptable microbiological quality.
Twenty-seven out of 151 (18%) imported lettuce samples had Enterobacteriaceae levels of 104 CFU/g or more.
However, these bacteria that constitute part of the natural microflora of unprepared vegetables may also be derived from the soil and/or by poor handling.
The pathogens, Salmonella spp., Shigella spp., Campylobacter spp., Escherichia coli O157 :
Listeria monocytogenes, and also Escherichia coli, an indicator of fecal contamination, were not detected in any imported lettuces, indicating that hygiene, harvesting, and production practices were good.
Imported lettuces with Enterobacteriaceae levels of 104 CFU/g or more varied with type of retail premises and the temperature at which the lettuces were displayed.
Samples from greengrocers, shops, and market stalls were more likely to contain Enterobacteriaceae at levels in excess of 104 CFU/g than those from supermarkets.
Mots-clés Pascal : Fèces, Salmonella, Enterobacteriaceae, Bactérie, Campylobacter, Campylobacteraceae, Escherichia coli, Listeria monocytogenes, Contrôle qualité, Laitue, Souche pathogène, Microflore, Contamination biologique, Produit frais, Importation, Stockage, Shigella, Hygiène, Qualité microbiologique
Mots-clés Pascal anglais : Feces, Salmonella, Enterobacteriaceae, Bacteria, Campylobacter, Campylobacteraceae, Escherichia coli, Listeria monocytogenes, Quality control, Lettuce, Pathogen strain, Microflora, Biological contamination, Fresh product, Import, Storage, Shigella, Hygiene, Microbiological quality
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0337062
Code Inist : 002A35A01. Création : 16/11/1999.