Association of wild bird density and farm management factors with the prevalence of E. coli O157 in dairy herds in Ohio (2007-2009).

Association of Wild Bird Density and Farm Management Factors with the Prevalence of <i>E. coli</i> O157 in Dairy Herds in Ohio (2007–2009)

Subacute ruminal acidosis: prevalence and risk factors in Greek dairy herds

Subacute ruminal acidosis (SARA) represents one of the most important metabolic subclinical disordersof high producing dairy cows, having serious impact in both animal health and herd profitability. The aim ofthis study was to confirm the presence of SARA in Greek dairy herds and record its prevalence and riskfactors. Ruminal fluid samples, via rumenocentesis, were obtained from a total of 153 ...

Prevalence estimation and risk factors for Escherichia coli O157 on Dutch dairy farms.

To estimate the prevalence of Escherichia coli O157 on Dutch dairy herds, faecal samples were collected once from 678 randomly selected dairy farms in the period October 1996-December 2000. Samples were cultured for E. coli O157. Thirty-eight isolates were tested for virulence genes (eae, VT1 and VT2). A questionnaire about farm characteristics was taken from the farm manager, resulting in vari...

Effect of sand and sawdust bedding materials on the fecal prevalence of Escherichia coli O157:H7 in dairy cows.

Farm management practices that reduce the prevalence of food-borne pathogens in live animals are predicted to enhance food safety. To ascertain the potential role of livestock bedding in the ecology and epidemiology of Escherichia coli O157:H7 on farms, the survival of this pathogen in used-sand and used-sawdust dairy cow bedding was determined. Additionally, a longitudinal study of mature dair...

Prevalence of Escherichia coli O157:H7 on dairy farms in Shiraz, Iran by immunomagnetic separation and multiplex PCR

To identify the reservoirs of shiga toxin-producing Escherichia coli O157, sensitive detection andisolation methods are necessary. The sensitivity of traditional culture methods can be improved significantlyby the inclusion of an immunoconcentration step, resulting in less false-negative results. In this study,enrichment procedure and immunomagnetic separation (IMS) were compared for use in con...