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Qualitative and Quantitative Analysis of Escherichia coli Population of the Enteral Microbiota of Patients with Inflammatory Bowel Disease

Grant number: 11/13865-4
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2011
Effective date (End): October 31, 2012
Field of knowledge:Biological Sciences - Microbiology - Applied Microbiology
Principal researcher:Josias Rodrigues
Grantee:Helton Luís de Souza
Home Institution: Instituto de Biociências (IBB). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

The natural habitat of Escherichia coli (E. coli) is the intestine of humans and warm-blooded animals. However, while a member of the resident microbiota, the bacteria can cause disease in their hosts. The intestinal infection by E. coli in humans is diarrhea and dysentery. Data accumulated in the literature suggest that they may also be involved in the etiology of inflammatory bowel disease (IBD), a condition marked by intense inflammatory reactions throughout the intestinal tract, leading to the appearance of lesions that can cause serious complications. The most consistent evidence of its probable role in disease is the finding that patients with IBD have an increased population of E. coli. Being the kind very heterogeneous in terms of virulence, the challenge for these bacteria is to quantify and determine the nature of the strains present in patients. To contribute information to this effect, we intend here to investigate likely variations in the prevalence of E. coli in faeces and mucosa of different intestinal segments, between controls and patients with the disease, and characterize the strains detected by PCR looking for potential virulence genes.

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