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Shigella dysenteriae

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A gram-negative non-spore forming and facultative anaerobes involved in severe dysentery infections.


Shigella dysenteriae incubation period will penetrate the mucosal epithelial cells of the intestine causing severe irritation that leads to cramps, bloody and watery diarrhea as well as dehydration becomes a complication that sometimes lead to death and chronically ill.

Shigella dysenteriae is generally found in stool of infected individuals and in contaminated water supplies. It is spread through food and water which cause severe dysentery due to its deadly Shiga toxins. It will survive up to 7 weeks in soil environment and 5-11 days in water as well as 6 six weeks in dust particles. Human is the major natural host of this bacterium though houseflies may serves as vectors for transmission.

Shigella dysenteriae is implicated in shigellosis infection manifested with watery diarrhea often painful passage of stool containing pus, blood and mucus as well as accompanied by nausea and fever. This disease most frequently occurs in areas of poor sanitation and overcrowding population in which individual suffer from cramping and vomiting.

Scientific classification:

Kingdom: Bacteria

Phylum: Proteobacteria

Class: Gammaproteobacteria

Order: Enterobacteriales

Family: Enterobacteriaceae

Genus: Shigella

Species: Shigella dysenteriae

See also:

• Bacteria

• Shigellosis

• Dysentery