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Pronunciation: fran-si-sel'la

Definition: A genus of nonmotile, non-spore-forming, aerobic bacteria that contain small, gram-negative cocci and rods. Capsules are rarely produced and the cells may show bipolar staining. These organisms are highly pleomorphic; they do not grow on plain agar or in liquid media without special enrichment; they are pathogenic and cause tularemia in humans. The type species is Francisella tularensis.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.