genomics-based molecular epidemiology of campylobacter jejuni isolates from feedlot cattle and from people in alberta, canada.feedlot cattle in alberta, canada, have been identified as reservoirs for campylobacter jejuni, an important human pathogen. oligonucleotide dna microarrays were used as a platform to compare c. jejuni isolates from feedlot cattle and human clinical cases from alberta. comparative genomic hybridization (cgh) analysis was performed on 87 isolates (46 bovine, 41 human) obtained within the same geographical regions and time frame. thirteen cgh clusters were obtained based on overall comparative gen ...200919036937
occurrence of foodborne bacteria in alberta feedlots.the occurrence of generic escherichia coli, e. coli o157, salmonella, and campylobacter in cattle manure, beef carcasses, catch basin water, and soils receiving manure application was determined in 21 alberta feedlots. in cattle manure, generic e. coli (98%, 2069/2100) and campylobacter (76%, 1590/2100) were frequently detected; e. coli o157 (7%, 143/2100) and salmonella (1%, 20/2100) were less frequently detected. samples from beef carcasses in the cooler following hazard analysis critical cont ...200919412396
prevalence and risk factor investigation of campylobacter species in beef cattle feces from seven large commercial feedlots in alberta, canada.this fecal prevalence study targeted cattle from 7 large (10,000 to > 40,000 head) commercial feedlots in alberta as a means of establishing campylobacter levels in cattle just prior to animals entering the food chain. overall, 87% [95% confidence interval (ci) = 86-88] of 2776 fresh pen-floor fecal samples were culture positive for campylobacter species, with prevalences ranging from 76% to 95% among the 7 feedlots. campylobacter spp. prevalence was 88% (95% ci = 86-90) in the summer (n = 1376) ...200920046629
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