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Shigella
Shigella is a Gram-negative, facultative anaerobe, non-spore forming, non-motile, rod-shaped enterobacterium causing shigellosis or “bacillary dysentery” and comprising four serogroups: S. dysenteriae serotypes 1-15 (group A), S. flexneri serotypes 1-8 (B), S. boydii serotypes 1-19 (C) and S. sonnei serotype 1 (D).
