| outbreak of acute gastroenteritis attributable to escherichia coli serotype o104:h21--helena, montana, 1994. | during february-march, 1994, four persons in helena, montana (1995 population: 24,569), developed bloody diarrhea and severe abdominal cramps. stool cultures for salmonella, shigella, campylobacter, and escherichia coli o157:h7 were negative; however, sorbitol-negative e. coli colonies were identified in stools from all four patients. isolates from three patients were identified at cdc as a rare serotype--e. coli o104:h21 that produced shiga-like toxin ii. this report summarizes the epidemiologi ... | 1995 | 7596334 |
| prevalence of escherichia coli o157:h7 in range beef calves at weaning. | this study was designed to determine the prevalence of escherichia coli o157:h7 infection of beef calves at weaning, prior to arrival at the feedlot or mixing with cattle from other sources. fifteen range cow-calf herds, which weaned calves in october and november, were sampled in kansas, missouri, montana, nebraska and south dakota. faecal culture for e. coli o157:h7 was performed and anti-o157 serum antibody titres were determined by blocking elisa. thirteen of the 15 herds (87%) were found to ... | 1999 | 10579450 |
| shiga toxin-producing escherichia coli in montana: bacterial genotypes and clinical profiles. | the diseases and virulence genes associated with shiga toxin-producing escherichia coli (stec) are characterized incompletely. we analyzed, by polymerase chain reaction, 82 stec isolates collected prospectively in montana and profiled associated illnesses by patient chart review. all e. coli o157:h7 contained stx2-group genes, as well as eae, iha, espa, and ehxa; 84% contained stx1. non-o157:h7 stec less frequently contained stx1 (p=.046), stx2 (p<.001), iha (p<.001), eae, and espa (p=.039 for b ... | 2003 | 12934188 |