Main content area

Microbiological composition of raw milk from selected farms in the Camembert region of Normandy

Desmasures, N., Bazin, F., Gueguen, M.
Journal of applied microbiology 1997 v.83 no.1 pp. 53-58
Brevibacterium linens, Campylobacter, Clostridium perfringens, Enterococcus, Escherichia coli, Lactobacillus, Lactococcus, Leuconostoc, Listeria monocytogenes, Micrococcaceae, Pseudomonas, Salmonella, Staphylococcus aureus, Yersinia enterocolitica, coliform bacteria, farms, food contamination, lactic acid bacteria, microbial contamination, plate count, raw milk, somatic cell count, spores, yeasts, France
Raw milk from 27 farms was sampled over 6 months for listerias, salmonellas, Yersinia enterocolitica and campylobacters. Total bacterial counts and somatic cell counts were measured. Lactococci, lactobacilli, dextran-producing leuconostocs, Brevibacterium linens, yeasts and moulds, Staphylococcus aureus and other Micrococcaceae, Pseudomonas, coliforms, Escherichia coli, enterococci, Clostridium perfringens and spores of anaerobic lactate-fermenting bacteria were also counted. Pseudomonas (2000 cfu ml-1), lactococci (760 cfu ml-1) and Micrococcaceae (720 cfu ml-1) were the most numerous groups. Lactic acid bacteria were detected in all samples. Coliforms were present in most samples, but 84% of samples had counts <100 cfu ml-1. Staphylococcus aureus was detected in 62% of milks, the average count was 410 cfu ml-1. About 80% of supplies had less than or equal to 10 E. coli cfu ml-1 and all samples had less than or equal to 1 Cl. perfringens cfu ml-1. Two of the tested milks were positive for salmonellas (2.9%), four were positive for Listeria monocytogenes (5.8%), 25 for Yersinia enterocolitica (36%) and one for campylobacters (1.4%).