Microbiological composition of raw milk from selected farms in the Camembert region of Normandy.
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 < or = 10 E. coli cfu ml-1 and all samples had < or = 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%).
Desmasures
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N
Laboratoire de Microbiologie Allmentaire, Université de Caen, France.
Bazin
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F
Guéguen
M
M
D000818:Animals; D001421:Bacteria, Anaerobic / Q000302:isolation & purification; D001431:Bacteriological Techniques; D001951:Brevibacterium / Q000302:isolation & purification; D002167:Campylobacter / Q000302:isolation & purification; D002417:Cattle; D003016:Clostridium perfringens / Q000302:isolation & purification; D003612:Dairying; D004755:Enterobacteriaceae / Q000302:isolation & purification; D016983:Enterococcus / Q000302:isolation & purification; D005260:Female; D005602:France; D007778:Lactobacillus / Q000302:isolation & purification; D017045:Lactococcus / Q000302:isolation & purification; D008087:Listeria / Q000302:isolation & purification; D008835:Micrococcaceae / Q000302:isolation & purification; D008892:Milk / Q000382:microbiology*; D011549:Pseudomonas / Q000302:isolation & purification; D012475:Salmonella / Q000302:isolation & purification; D015003:Yeasts / Q000302:isolation & purification; D015007:Yersinia / Q000302:isolation & purification