Two groups of calves were subjected to dietary stress by withholding of food beginning 1 or 14 days after inoculation with 10(10) CFU of Escherichia coli O157:H7. Following treatment, neither group had a significant increase in fecal shedding of E. coli O157:H7. A third group of calves had food withheld for 48 h prior to inoculation with 10(7) CFU of E. coli O157:H7. These calves were more susc...

This study compared the efficacy of lactoferricin B (LB), peroxyacetic acid (PAA), acidified sodium chlorite (ASC), cetylpyridinium chloride (CPC), acetic acid (AA), lactic acid (LA), acidified chlorite (AC) and water when analyzed as dipping solutions for fresh beef carcass tissue (BCT) surfaces for reducing populations of Escherichia coli O157:H7. In this study, CPC reduced E. coli O157:H7 po...

In recent years, several studies have reported infections associated with Escherichia coli O157:H7, especially in developed countries (1). Except Japan, isolation of E. coli O157:H7 has also been reported in Asian countries (2). Limited work has been carried out on E. coli O157:H7 in Thailand (3,4). Suthienkul et al. reported no E. coli O157 in retail meat and cattle (3), but it was recently is...

Escherichia coli O157:H7 causes 73,000 illnesses in the United States annually. We reviewed E. coli O157 outbreaks reported to Centers for Disease Control and Prevention (CDC) to better understand the epidemiology of E. coli O157. E. coli O157 outbreaks (>or=2 cases of E. coli O157 infection with a common epidemiologic exposure) reported to CDC from 1982 to 2002 were reviewed. In that period, 4...

Numerous Salmonella enterica and Escherichia coli O157:H7 outbreaks have been associated with contaminated sprouts. We examined how S. enterica serovars, E. coli serotypes, and nonpathogenic bacteria isolated from alfalfa sprouts grow on and adhere to alfalfa sprouts. Growth on and adherence to sprouts were not significantly different among different serovars of S. enterica, but all S. enterica...

AIMS To determine if exogenous melatonin (MEL) influences growth of Escherichia coli O157:H7 in pure culture and if MEL affects faecal shedding patterns of E. coli O157:H7 or total leucocyte counts in sheep. METHODS AND RESULTS Two strains of E. coli O157:H7 were cultured in the presence of varying concentrations of MEL. Maximal specific growth rates of E.coli O157:H7 strains were not affecte...

Plant roots and leaves can be colonized by human pathogenic bacteria, and accordingly some of the largest outbreaks of foodborne illness have been associated with salad leaves contaminated by E. coli O157. Integrated disease management strategies often exploit cultivar resistance to provide a level of protection from economically important plant pathogens; however, there is limited evidence of ...

The presence of Escherichia coli (E. coli) in food and drinking water is a chronic problem worldwide. Protecting food against bacterial contamination and rapid diagnosis of infection require simple and rapid assays for detection of bacterial pathogens, including E. coli O157:H7. Here we report a rapid and novel colorimetric method for detecting E. coli O157:H7. This colorimetric method is based...

Differences in E. coli O157:H7 strain colonization and shedding patterns in cattle American researchers conducted oral challenge studies with three different genotypes of E. coli O157:H7 in cattle to determine the genotypic variability in shedding frequencies and concentrations and the extent of contamination of the environment. Four groups of Holstein steers each were orally challenged with 10...