COMMENTARY
Helicobacter bilis
Helicobacter bilis: bacterial provocateur orchestrates host immune responses to commensal flora in a model of inflammatory bowel disease
Correspondence to:
Correspondence to:
Dr J G Fox
Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Building 16, Room 825C, Cambridge, MA 02139, USA; jgfox@mit.edu
Helicobacter bilis can elicit heterologous immune responses to lower gut flora
| The first 150 words of the full text of this article appear below. |
The gastrointestinal tracts of mammals, including mice, are colonised with a diverse microecosystem. The caeca of normal conventional mice have been estimated to contain from 100 to 1000 individual species, and the number of bacteria can reach levels of up to 1011 bacteria/g of faeces.1,2 These microorganisms provide essential nutrients for their host and also colonise mucosal niches, which may partly influence the host response against microbial pathogens.27 By far, the greatest concentration and different types of bacteria comprising the gastrointestinal microflora of mice and humans reside in the caecum and colon.8,9,10 The fusiform-shaped bacteria, spirochetes and spiral-shaped bacteria were shown by histology to be almost exclusively located in the mucinous secretion overlaying the epithelium of the large bowel, and apparently in intimate association with the epithelial barrier.10 In the 1960s, Schaedler et al11 colonised germ-free mice with selected bacteria isolated from "normal" mice. He then supplied animal
Relevant Article
- Helicobacter bilis triggers persistent immune reactivity to antigens derived from the commensal bacteria in gnotobiotic C3H/HeN mice
- Albert E Jergens, Jennifer H Wilson-Welder, Andrea Dorn, Abigail Henderson, Zhiping Liu, Richard B Evans, Jesse Hostetter, and Michael J Wannemuehler
Gut 2007 56: 934-940.[Abstract] [Full Text] [PDF]
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