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Non-O1 and non-O139 Vibrio cholerae Septicemia and Cellulitis: a Case Report.

Non-O1 and non-O139 Vibrio cholerae (NOVC) are serogroups that do not produce cholera toxin and are not responsible for epidemics. Even though rarely encountered in clinical practice, they can cause a spectrum of different conditions ranging from mild gastrointestinal syndrome to extraintestinal diseases, of which bacteremia and wound infections are the most severe. Risk factors for severe disease are cirrhosis, neoplasms, and diabetes mellitus. The mortality rate of NOVC bacteremia in hospitalized patients ranges from 24 to 61.5%. Incidence of NOVC infections is still rare, and consensus recommendations on treatment are not available. We report a case of NOVC bacteremia associated with severe cellulitis in an immunocompetent 75-year-old man who had eaten raw seafood in a location by the northern Adriatic Sea (Italy). Twenty-four hours after intake, he developed a high fever and vomiting. Afterwards, he started noticing the appearance of cellulitis in his right leg, which worsened in a matter of hours. The patient had a history of compensated type 2 diabetes mellitus. NOVC was isolated from both blood cultures and the leg ulcer. The non-O1, non-O139 serogroup was confirmed, and the detection of the cholera toxin gene was negative. Both tests were performed by the Reference National Laboratory of Istituto Superiore di Sanità (ISS). Multiple antimicrobial regimens were administered, with complete recovery. In conclusion, considering the severity of NOVC-associated manifestations, it is of pivotal importance to reach etiological diagnosis for a target antimicrobial therapy and to consider V. cholerae infection in the differential diagnosis in the presence of risk factors and potential exposure.

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