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Vibrio cincinnatiensis is a species Gram negative bacteria. It was named after Cincinnati, Ohio where it was first isolated and characterized. It is rarely isolated from human specimens. In the 2019, V. cincinnatiensis accounted for only 0.07% of all confirmed cases of vibriosis in the United States.

Description
Vibrio cincinnatiensis is a halophilic, facultatively anaerobic Gram-negative rod, 0.7 by 2.0 μm in diameter. This organism is oxidase positive and motile by a single polar flagellum. V. cincinnatiensis produces yellow colonies on TCBS agar, indicating sucrose fermentation.

Similar to other members of the Vibrionaceae family, V. cincinnatiensis is most commonly isolated from marine and aquatic environments. This bacterium was isolated from several bodies of water including Chesapeake Bay, Adriatic Sea, and Ohta River. In all these studies, V. cincinnatiensis represented only a small fraction of the resident Vibrio populations.

Clinical Significance
Vibrio cincinnatiensis is listed as a pathogenic member of Vibrionaceae. However, due to the low number of reported cases and the broad diversity of disease presentation, this bacterium's status as a human enteric or wound pathogen is unclear.

V. cincinnatiensis was first isolated from the blood and cerebrospinal fluid of a 70-year-old male at the University of Cincinnati Hospital in 1986. The patient had no known contact with seafood or seawater. Therapy was begun with ampicillin followed by moxalactam. The patient's uneventful recovery represented the first successful treatment of Vibrio sp. meningitis in an adult. This bacterium was also isolated from the stool of a patient experiencing gastroenteritis.

The first reported case of V. cincinnatiensis was

E. casseliflavus shares many phenotypic traits with the more frequently encountered E. faecium. However, additional biochemical tests can be used to separate the two organisms. Additionally, E. casselflavus produces respiratory quinones and its colonies possess a bright yellow pigment.

E. casseliflavus possess the vanC genotype and are intrinsically resistant to glycopeptides such as vancomycin.

Note: + = Positive, - =Negative

Note: + = Positive, - =Negative