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microbiological quality of raw milk used for small-scale artisan cheese production in vermont: effect of farm characteristics and practices.this study 1) evaluated the overall milk quality and prevalence of 4 target pathogens (listeria monocytogenes, staphylococcus aureus, salmonella spp., and escherichia coli o157:h7) in raw milk used for small-scale artisan cheesemaking and 2) examined specific farm characteristics and practices and their effect on bacterial and somatic cell counts (scc). raw milk samples were collected weekly from 21 artisan cheese operations (6 organic) in the state of vermont that manufactured raw-milk cheese f ...201020059912
linking environmental and human strains of listeria monocytogenes with isoenzyme and ribosomal rna typing. 19902113872
multistate outbreak of listeriosis--united states, 1998.since early august 1998, 40 illnesses caused by a single strain of listeria monocytogenes (lm) have been identified in 10 states: ohio (13 cases); new york; tennessee, massachusetts, and west virginia (three each); michigan (two); and connecticut, oregon, vermont, and georgia (one each). dates of illness onset or lm isolation ranged from august 2 through december 2. all lm isolates from these cases are serotype 4b and share an unusual pattern when subtyped either by pulsed-field gel electrophore ...19989883769
delivery of selective agents via time-delayed release tablets improves recovery of listeria monocytogenes injured by acid and nitrite.listeria selective enrichment media are designed to enhance the isolation of the organism and increase the chances of detection. drawbacks include the requirements for prolonged sample incubation (48 to 72 h) and manual addition of selective agents, which may be a source of contamination. modified listeria recovery broth (mlrb) is a proprietary enrichment medium formulated to facilitate the recovery of injured cells; its selective agents are incorporated into a format that allows delayed release ...201424780332
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