Shigella dysenteriae

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	'''Shigella dysenteriae'''		'''Shigella dysenteriae'''
		+	They are Gram-negative, non-spore-forming, facultatively anaerobic, non-motile bacteria.
		+	{| border="1" style="text-align: left;"
		+	|+ '''Scientific classification'''
		+	!Kingdom || Bacteria
		+	|-
		+	! Phylum || Proteobacteria
		+	|-
		+	! Class || Gamma Proteobacteria
		+	|-
		+	! Order || Enterobacteriales
		+	|-
		+	! Family || Enterobacteriaceae
		+	|-
		+	! Genus || Shigella
		+	|-
		+	! Species || '''''S. dysenteriae'''''
		+	|-
		+	! Binomial || ''Shigella dysenteriae''
		+	|}
		+	==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.
		+
		+
		+	==References==
		+
		+	[http://en.wikipedia.org/wiki/Shigella_dysenteriae Wikipedia]

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Revision as of 10:57, 8 July 2010

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

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.

References

Wikipedia