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State health departments are reporting an increase in severe Vibrio vulnificus infections along the Gulf Coast in recent weeks with the highest concern currently centered around Louisiana, which has recorded 9 confirmed cases for the year so far. All 9 patients were hospitalized, and 5 have died. Louisiana normally averages about 7 cases and 1 death per year, so the case counts and deaths have prompted public warnings for consumers to stay out of the Gulf waters if they have any open cuts or scrapes. In Florida, at least 14 cases and 2 deaths have been reported this year, compared with 33 cases and 5 deaths in all of 2025. The rise in cases is clinically important because Vibrio vulnificus infection is typically uncommon (150–200 cases per year), but it can progress quickly to severe illness and death.
Low incidence but high severity: Vibrio vulnificus can cause life-threatening infections and necrotizing fasciitis, and many patients require intensive care or limb amputations. About 1 in 5 people die, sometimes within 24–48 hours of becoming ill. Vibrio can be detected by culture-independent diagnostic testing, but suspected infection requires immediate treatment regardless, according to the Centers for Disease Control and Prevention (CDC). Red flags include rapidly increasing pain, erythema, swelling, warmth or discoloration, fever, systemic symptoms, hypotension, and bullous skin lesions following coastal-water exposure. The CDC offers a Clinical Overview of Vibriosis for clinicians, including symptoms and treatment. Read about a unique case of necrotizing fasciitis from the JUCM archive: Occult Presentation of Necrotizing Fasciitis With Subtle Clinical Findings: A Case Report