|
rdf:type |
|
|
lifeskim:mentions |
|
|
pubmed:issue |
5
|
|
pubmed:dateCreated |
2007-2-27
|
|
pubmed:abstractText |
Feedlot cattle were observed for fecal excretion of and rectoanal junction (RAJ) colonization with Escherichia coli O157:H7 to identify potential "supershedders." RAJ colonization and fecal excretion prevalences were correlated, and E. coli O157:H7 prevalences and counts were significantly greater for RAJ samples. Based on a comparison of RAJ and fecal ratios of E. coli O157:H7/E. coli counts, the RAJ appears to be preferentially colonized by the O157:H7 serotype. Five supershedders were identified based on persistent colonization with high concentrations of E. coli O157:H7. Cattle copenned with supershedders had significantly greater mean pen E. coli O157:H7 RAJ and fecal prevalences than noncopenned cattle. Cumulative fecal E. coli O157:H7 excretion was also significantly higher for pens housing a supershedder. E. coli O157:H7/E. coli count ratios were higher for supershedders than for other cattle, indicating greater proportional colonization. Pulsed-field gel electrophoresis analysis demonstrated that isolates from supershedders and copenned cattle were highly related. Cattle that remained negative for E. coli O157:H7 throughout sampling were five times more likely to have been in a pen that did not house a supershedder. The data from this study support an association between levels of fecal excretion of E. coli O157:H7 and RAJ colonization in pens of feedlot cattle and suggest that the presence of supershedders influences group-level excretion parameters. An improved understanding of individual and population transmission dynamics of E. coli O157:H7 can be used to develop preslaughter- and slaughter-level interventions that reduce contamination of the food chain.
|
|
pubmed:grant |
|
|
pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-11407550,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-11811890,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-12595469,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-12706055,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-12732509,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-14605119,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-14627271,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-14979594,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-15063499,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-15083716,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-15460538,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-15640175,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-15659201,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-15771165,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-16161697,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-16204574,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-16238016,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-16409660,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-16672532,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-1779981,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-8877329,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-9041407,
http://linkedlifedata.com/resource/pubmed/commentcorrection/17220263-9282387
|
|
pubmed:language |
eng
|
|
pubmed:journal |
|
|
pubmed:citationSubset |
IM
|
|
pubmed:status |
MEDLINE
|
|
pubmed:month |
Mar
|
|
pubmed:issn |
0099-2240
|
|
pubmed:author |
|
|
pubmed:issnType |
Print
|
|
pubmed:volume |
73
|
|
pubmed:owner |
NLM
|
|
pubmed:authorsComplete |
Y
|
|
pubmed:pagination |
1563-8
|
|
pubmed:dateRevised |
2009-11-18
|
|
pubmed:meshHeading |
pubmed-meshheading:17220263-Anal Canal,
pubmed-meshheading:17220263-Animal Feed,
pubmed-meshheading:17220263-Animals,
pubmed-meshheading:17220263-Cattle,
pubmed-meshheading:17220263-Cattle Diseases,
pubmed-meshheading:17220263-Colony Count, Microbial,
pubmed-meshheading:17220263-Escherichia coli Infections,
pubmed-meshheading:17220263-Escherichia coli O157,
pubmed-meshheading:17220263-Feces,
pubmed-meshheading:17220263-Prevalence,
pubmed-meshheading:17220263-Rectum
|
|
pubmed:year |
2007
|
|
pubmed:articleTitle |
Rectoanal junction colonization of feedlot cattle by Escherichia coli O157:H7 and its association with supershedders and excretion dynamics.
|
|
pubmed:affiliation |
Field Disease Investigation Unit, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164-6610, USA. r.cobbold@uq.edu.au
|
|
pubmed:publicationType |
Journal Article,
Research Support, N.I.H., Extramural
|
