Shigella/Enteroinvasive E. coli (EIEC). There are four subgroups of Shigella species: subgroup A (S. dysenteriae), subgroup B (S. flexneri), subgroup C (S. boydii), and subgroup D (S. sonnei). All Shigella are non-motile, gram-negative rods which are typically transferred through person-to-person contact or ingestion of contaminated food or water (humans and other primates are the only known animal reservoirs). Infections are most common where hygiene is compromised, for example institutional settings (day care, nursing homes) and may become endemic in developing societies without running water and indoor plumbing.10 Shigella are responsible for multiple illnesses including shigellosis and bacillary dysentery which can result in bloody or non-bloody diarrhea.

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Cary Blair

Stool specimens should be collected in Cary Blair transport media according to manufacturer’s instructions.

Room temperature: 4 hours
Refrigerated: 3 days
Frozen: Not acceptable


1 – 24 hours from recept at lab