| detection, occurrence, and characterization of escherichia coli o157:h7 from raw ewe's milk in spain. | a study was carried out in the castilla y león region of spain to investigate the presence of escherichia coli o157:h7 in raw ewe's milk samples collected from several cheese factories during 1 year. all specimens were examined for e. coli o157:h7 by selective enrichment at 41.5 +/- 1.0 degrees c, after both 6 and 22 h of incubation, and then immunomagnetically separated and plated on cefixime-potassium tellurite-sorbitol macconkey agar. no growth was obtained in the enrichment broth after a 6-h ... | 2006 | 16629039 |