Multiple sources of Escherichia coli O157 in feedlots and dairy farms in the Northwestern USA

Hancock, Dale D.; Besser, Thomas E.; Rice, Daniel H.; Ebel, Eric D.; Herriott, Donald E.; Carpenter, Linda V.

doi:10.1016/s0167-5877(98)00050-6

Cited by 236 publications

(185 citation statements)

References 18 publications

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“…The evidence of contamination as the most potential source of E. coli 0157:H7 in beef was vividly highlighted further by Elder et al (2000) that meat only becomes contaminated with E. coli 0157:H7, when in contact with contaminated hide and or feaces during slaughter process. Evidently, E. coli 0157:H7 has been isolated from feaces or gastrointestinal tract of cattle, sheep, horses, pigs, turkeys, dogs and a variety of wild animals (Hancock et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

Prevalence of <i>Eschericia coli</i> 0157:H7 in fresh and roasted beef in Kano City, Nigeria

Dahiru¹,

Uraih²,

Enabulele³

et al. 2010

Bayero J. Pure App. Sci.

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The prevalence of Enterohemorrhagic Escherichia coli 0157:H7 in 300 fresh beef and 150 roasted beef samples from Kano city Nigeria was determined, by direct plating on Sorbitol MacConkey agar (CT-SMAC) supplemented with Cefexime 50µg/L and Potassium tellurite 25mg/L and resuscitation on Trypticase Soy Broth (TSB) at 25 0 C for two hours for roasted beef samples. Presumptive colonies were confirmed by using E. coli 0157:H7 latex agglutination test kit. Prevalence rate of 53% was obtained in fresh beef and 25.3% in roasted beef. Consumption of inadequately cooked beef poses a serious risk of infection. The study therefore stressed the need for health authorities to educate and put in place efficient surveillance strategies for detection and control of possible outbreaks of E. coli O157:H7 in the society.

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Section: Discussionmentioning

confidence: 99%

Prevalence of <i>Eschericia coli</i> 0157:H7 in fresh and roasted beef in Kano City, Nigeria

Dahiru¹,

Uraih²,

Enabulele³

et al. 2010

Bayero J. Pure App. Sci.

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“…Studies conducted in the United States have shown that EHEC O157 could be isolated from the faeces of less than 1.5% of calves under two months of age [113] and from 1.8 to 5% of the calves aged between two and four months [46,188]. Thereafter, the prevalence of EHEC O157 declines [67]…”

Section: Cattlementioning

confidence: 99%

Enterohaemorrhagic Escherichia coli: emerging issues on virulence and modes of transmission

et al. 2005

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-Enterohaemorrhagic Escherichia coli (EHEC) constitute a subset of serotypes (E. coli O157 and some other serogroups) of Shiga toxin (Stx)-producing E. coli (STEC) firmly associated with severe human illnesses like bloody diarrhoea and haemolytic uraemic syndrome. Stx production is essential but not sufficient for EHEC virulence. Most strains are capable of colonising the intestinal mucosa of the host with the "attaching and effacing" mechanism, genetically governed by a large pathogenicity island (PAI) defined as the Locus of Enterocyte Effacement. Other virulence factors carried by mobile genetic elements like PAI and plasmids have been recently described, and their role in the pathogenic process has not been fully elucidated. EHEC are zoonotic pathogens. They rarely cause disease in animals, and ruminants are recognised as their main natural reservoir. Cattle are considered to be the most important source of human infections with EHEC O157, and the ecology of the organism in cattle farming has been extensively studied. The organism has also been reported in sheep, goats, water buffalos, and deer. Pigs and poultry are not considered to be a source of EHEC and the sporadic reports may derive from accidental exposure to ruminant dejections. The epidemiology of EHEC infections has remarkably changed during the past ten years and an increasing number of unusual food vehicles have been associated with human infections. New routes of transmission have emerged, like contact with animals during farm visits and a wide variety of environment-related exposures. As for other zoonotic agents, having animals and raw products that are free from EHEC is not possible in practice. However, their occurrence can be minimised by applying high standards of hygiene in all the steps of the food production chain.

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“…Although studies agree that cattle (Hancock et al 1998;Chapman et al 1997) and some commensal wildlife species (associated with humans) are known sources of E. coli O157:H7 (Fenlon 1981;Meerburg et al 2004), most studies on pastoral wildlife (associated with natural environments) do not illustrate a substantial threat to food safety. Studies looking at pastoral small mammals and deer showed minimal prevalence of E. coli O157:H7 (Hancock et al 1998;Sargeant et al 1999;Fischer et al 2001). Studies also indicate that there is a very low probability (0-1%) that birds associated with natural environments will carry pathogenic bacteria that could contaminate food crops (Brittingham et al 1988;Hancock et al 1998).…”

Section: Conflict On the Central Coastmentioning

confidence: 99%

“…Studies looking at pastoral small mammals and deer showed minimal prevalence of E. coli O157:H7 (Hancock et al 1998;Sargeant et al 1999;Fischer et al 2001). Studies also indicate that there is a very low probability (0-1%) that birds associated with natural environments will carry pathogenic bacteria that could contaminate food crops (Brittingham et al 1988;Hancock et al 1998). More recently, E. coli O157:H7 other noncrop vegetation.…”

Section: Conflict On the Central Coastmentioning

confidence: 99%

Food safety and environmental quality impose conflicting demands on Central Coast growers

Beretti¹,

Stuart²

2008

Cal Ag

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Multiple sources of Escherichia coli O157 in feedlots and dairy farms in the Northwestern USA

Cited by 236 publications

References 18 publications

Prevalence of <i>Eschericia coli</i> 0157:H7 in fresh and roasted beef in Kano City, Nigeria

Prevalence of <i>Eschericia coli</i> 0157:H7 in fresh and roasted beef in Kano City, Nigeria

Enterohaemorrhagic Escherichia coli: emerging issues on virulence and modes of transmission

Food safety and environmental quality impose conflicting demands on Central Coast growers

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