Shigella dysenteriae
From DrugPedia: A Wikipedia for Drug discovery
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==Surface Characteristics== | ==Surface Characteristics== | ||
Chemically, the O-antigen is a polysaccharide chain of variable length, built up by repetitive sequences of tetra- to hexasaccharides. It consists of a basic tetrasaccharide repeating unit consisting of three rhamnoses and one N-acetylglucosamine was common to all S. flexneri strains (except serotype 17): -2)-α-L-Rhap-(1-->2)-α-L-Rhap-(1-->3)-α-L-Rhap-(1-->3)-β-D-GlcpNAc-(1--> | Chemically, the O-antigen is a polysaccharide chain of variable length, built up by repetitive sequences of tetra- to hexasaccharides. It consists of a basic tetrasaccharide repeating unit consisting of three rhamnoses and one N-acetylglucosamine was common to all S. flexneri strains (except serotype 17): -2)-α-L-Rhap-(1-->2)-α-L-Rhap-(1-->3)-α-L-Rhap-(1-->3)-β-D-GlcpNAc-(1--> | ||
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==Transmission== | ==Transmission== | ||
Revision as of 10:58, 8 July 2010
Shigella dysenteriae
They are Gram-negative, non-spore-forming, facultatively anaerobic, non-motile bacteria.
| Kingdom | Bacteria |
|---|---|
| Phylum | Proteobacteria |
| Class | Gamma Proteobacteria |
| Order | Enterobacteriales |
| Family | Enterobacteriaceae |
| Genus | Shigella |
| Species | S. dysenteriae |
| Binomial | Shigella dysenteriae |
Contents |
Surface Characteristics
Chemically, the O-antigen is a polysaccharide chain of variable length, built up by repetitive sequences of tetra- to hexasaccharides. It consists of a basic tetrasaccharide repeating unit consisting of three rhamnoses and one N-acetylglucosamine was common to all S. flexneri strains (except serotype 17): -2)-α-L-Rhap-(1-->2)-α-L-Rhap-(1-->3)-α-L-Rhap-(1-->3)-β-D-GlcpNAc-(1-->
Transmission
S. dysenteriae, spread by contaminated water and food. Contamination is often caused by bacteria on unwashed hands during food preparation, or soiled hands reaching the mouth
Pathogenic Activity
They causes the most severe dysentery because of its potent and deadly Shiga toxin, but other species may also be dysentery agents.
