Salmonella spreads by targeting cells in our gut, study shows

Dec. 11, 2012 ? Scientists have gained fresh insights into how the salmonella bug makes us ill. University of Edinburgh researchers have found that the bacteria are able to change key cells that line the intestine, enabling the bugs to thrive.

By changing the make-up of these cells, the salmonella bacteria are able to cross the gut wall.

Food poisoning

Salmonella food poisoning -- commonly caused by eating undercooked poultry or eggs -- can lead to diarrhea, fever and even death in young children.

Scientists say the study furthers our understanding of how bacterial infections occur and what enables them to spread.

Cellular make-up

The University of Edinburgh research found that the salmonella released a protein -- SopB -- changing the make-up of certain cells that line the gut.

This causes a dramatic increase in cells -- called microfold or M cells.

The work, reveals how once the salmonella produces large number of these cells it can then get through into the bloodstream, causing infection.

"Bacteria have evolved sophisticated strategies to interact with and infect the host. This highlights yet another way in which microbes are able to transform cells into a type that suits their habitat," said Dr Arvind Mahajan, of The Roslin Institute at the University of Edinburgh.

The study was funded by the Biotechnology and Biological Sciences Research Council.

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Story Source:

The above story is reprinted from materials provided by University of Edinburgh.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.

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Journal Reference:

1. Amin Tahoun, Simmi Mahajan, Edith Paxton, Georg Malterer, David?S. Donaldson, Dai Wang, Alwyn Tan, Trudi?L. Gillespie, Marie O?Shea, Andrew?J. Roe, Darren?J. Shaw, David?L. Gally, Andreas Lengeling, Neil?A. Mabbott, J?rgen Haas, Arvind Mahajan. Salmonella Transforms Follicle-Associated Epithelial Cells into M Cells to Promote Intestinal Invasion. Cell Host & Microbe, 2012; 12 (5): 645 DOI: 10.1016/j.chom.2012.10.009

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/most_popular/~3/cKPMvuWht5c/121211112953.htm

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