Shigellosis causes

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-In-Chief: Yazan Daaboul; Serge Korjian

Overview

Shigellosis is usually a foodborne or waterborne illness caused by an infection with Shigella species. Shigella is a gram-negative, non-motile, facultatively anaerobic, non-spore-forming rod.

Causes

Etiologic Agent

Shigellosis is usually a foodborne or waterborne illness caused by an infection with Shigella species.

• There are 4 Shigella species that are responsible for development of Shigellosis:

• Serogroup A: S. dysenteriae (12 serotypes)
• Serogroup B: S. flexneri (6 serotypes)
• Serogroup C: S. boydii (23 serotypes)
• Serogroup D: S. sonnei (1 serotype)

Structure

• Shigella is a gram-negative, non-motile, facultatively anaerobic, non-spore-forming rod.
• Shigella is closely related to E. coli, where both organisms are thought to be derived from similar vector plasmids. Unlike E. coli, Shigella cannot ferment lactose or decarboxylate lysine.