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Attaching and effacing lesions caused by Escherichia coli O157:H7 in experimentally inoculated neonatal lambs

Wales, A. D., Pearson, G. R., Skuse, A. M., Roe, J. M., Hayes, C. M., Cookson, A. L. and Woodward, M. J. (2001) Attaching and effacing lesions caused by Escherichia coli O157:H7 in experimentally inoculated neonatal lambs. Journal of Medical Microbiology, 50 (9). pp. 752-758. ISSN 0022-2615

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Official URL: http://jmm.sgmjournals.org/content/50/9.toc

Abstract/Summary

Four 6-day-old conventionally reared lambs were inoculated orally with a total of 10(9) cfu comprising equal numbers of four enterohaemorrhagic Escherichia coli (EHEC) O157:H7 strains. All animals remained clinically normal. Tissues were sampled under terminal anaesthesia at 12, 36, 60 and 84 h post inoculation (hpi). EHEC O157:H7 was cultured from most gastrointestinal tract sites. Small, sparse attaching and effacing (AE) lesions were found in the caecum at 12 and 36 hpi and in the terminal colon and rectum at 84 hpi. Organisms in the lesions were labelled specifically by an O157 antiserum. The results indicate that the well-characterised mechanisms for intimate attachment encoded by the locus for enterocyte effacement (LEE) of EHEC O157:H7 may contribute to the initial events. at least, of colonisation of sheep.

Item Type:Article
Refereed:Yes
Divisions:No Reading authors. Back catalogue items
Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Microbial Sciences Research Group
ID Code:30013
Publisher:Society of General Microbiology

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