Shigella dysenteriae

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Current revision

Shigella dysenteriae

They are Gram-negative, non-spore-forming, facultatively anaerobic, non-motile bacteria.

Scientific classification

Kingdom	Bacteria
Phylum	Proteobacteria
Class	Gamma Proteobacteria
Order	Enterobacteriales
Family	Enterobacteriaceae
Genus	Shigella
Species	S. dysenteriae
Binomial	Shigella dysenteriae

Contents 1 Surface Characteristics 2 Transmission 3 Pathogenic Activity 4 References

[edit] 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-->

[edit] 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

[edit] Pathogenic Activity

They causes the most severe dysentery because of its potent and deadly Shiga toxin, but other species may also be dysentery agents.

[edit] References

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