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- Schmidt, John W., et al. Show all 3 Authors
- Microbial Drug Resistance 2016 v.22 no.7 pp. 598-608
- Enterococcus; Escherichia coli; Salmonella enterica; acid tolerance; animal husbandry; antibiotic resistance; bacteria; beef cows; ceftiofur; cow-calf operations; erythromycin; feces; multiple drug resistance; nalidixic acid; records; sulfamethoxazole; tetracycline; trimethoprim
- ... We compared the occurrences of 3rd-generation cephalosporin-resistant (3GCr), tetracycline-resistant (TETr), and trimethoprim-sulfamethoxazole-resistant (COTr) Escherichia coli, 3GCr and nalidixic acid-resistant (NALr) Salmonella enterica, and erythromycin-resistant (ERYr) enterococci from the fecal samples of ceftiofur-treated (n = 162) and nonantimicrobial-treated (n = 207) comingled beef cows ≥ ...
- Schmidt, John W., et al. Show all 5 Authors
- Journal of food protection 2016 v.79 no.4 pp. 531-537
- Salmonella enterica; adults; anus; bacterial shedding; cattle; confidence interval; cross-sectional studies; excretion; feces; feedlots; food pathogens; harvesting; human health; immunomagnetic separation; mucosa; risk
- ... Cattle are noted carriers of the foodborne pathogen Salmonella enterica. The perceived need to decrease the potential human health risk posed by excretion of this pathogen has resulted in numerous studies examining the factors that influence cattle shedding of Salmonella. Fecal grab (FG) samples have been the predominant method used to identify cattle colonized or infected with Salmonella, however ...
- Schmidt, John W., et al. Show all 8 Authors
- Applied and environmental microbiology 2015 v.81 no.2 pp. 713-725
- Escherichia coli; Salmonella enterica; acid tolerance; antibiotic resistance; bacteria; beef carcasses; beef cattle; cattle production; feces; feedlots; food contamination; food sanitation; hides and skins; humans; loins; meat processing; microbial detection; pathogens; urinary tract diseases
- ... Specific concerns have been raised that third-generation cephalosporin-resistant (3GCr) Escherichia coli, trimethoprim-sulfamethoxazole-resistant (COTr) E. coli, 3GCr Salmonella enterica, and nalidixic acid-resistant (NALr) S. enterica may be present in cattle production environments, persist through beef processing, and contaminate final products. The prevalences and concentrations of these organ ...
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