| an outbreak of escherichia coli o157:h7 infections among visitors to a dairy farm. | outbreaks of escherichia coli o157:h7 infections have involved direct transmission from animals and their environment to humans. we describe an outbreak among visitors to a pennsylvania dairy and petting farm that provides public access to animals. | 2002 | 12192014 |
| immunity from liability--when does it apply? | | 2003 | 12971045 |
| effect of manure on escherichia coli attachment to soil. | attachment of bacteria to soil is an important component of bacterial fate and transport. escherichia coli are commonly used as indicators of fecal contamination in the environment. despite the fact that e. coli are derived exclusively from feces or manure, effect of the presence of manure colloids on bacteria attachment to agricultural soils was never directly studied. the objective of this work was to evaluate the magnitude of the effect of manure on e. coli attachment to soil. escherichia col ... | 2005 | 16221829 |
| slaughterhouse survey of pyelonephritis in dairy cows. | twenty-one rejected kidneys from 2426 slaughtered dairy cows (0.87 per cent) had gross signs of pyelonephritis that were confirmed by histopathology. in all the kidneys the findings were consistent with a chronic rather than an acute infection. one species of bacteria was cultured from 12 of the kidneys and two species of bacteria were cultured from six. the most commonly isolated bacteria were escherichia coli, from eight kidneys, arcanobacterium pyogenes, from seven kidneys and corynebacterium ... | 2005 | 16299366 |
| molecular epidemiology of ceftiofur-resistant escherichia coli isolates from dairy calves. | healthy calves (n = 96, 1 to 9 weeks old) from a dairy herd in central pennsylvania were examined each month over a five-month period for fecal shedding of ceftiofur-resistant gram-negative bacteria. ceftiofur-resistant escherichia coli isolates (n = 122) were characterized by antimicrobial resistance (disk diffusion and mic), serotype, pulsed-field gel electrophoresis subtypes, beta-lactamase genes, and virulence genes. antibiotic disk diffusion assays showed that the isolates were resistant to ... | 2006 | 16751500 |
| genotypic diversity of escherichia coli in a dairy farm. | dairy cattle are known reservoirs of pathogenic escherichia coli, but little is known about the dynamics of e. coli in dairy cows or within the dairy farm environment. this study was conducted to evaluate the diversity and distribution of e. coli strains in a dairy farm using pulsed-field gel electrophoresis and to determine the relationships between e. coli isolated from feces and throughout the farm environment. water from watering troughs, feces from cows, manure composites, milk, and milk fi ... | 2009 | 19459756 |