# Shigella sonnei

National Cancer Institute

## Source

National Cancer Institute. *Shigella sonnei*. NCI Thesaurus. Code C86747.

A species of facultatively anaerobic, Gram negative, rod shaped bacteria in the phylum Proteobacteria. This species is indole and citrate negative, ferments mannitol and ornithine and is beta-D-galactosidase positive. S. sonnei is found in the human gastrointestinal system and is pathogenic, being a causative agent of shigellosis.