Vibrio vulnificus is a marine bacterium that can cause severe illness after exposure through raw seafood or open wounds. Typical early signs—fever, chills, and gastrointestinal upset—appear within 24 hours, and severe manifestations such as cellulitis or sepsis may develop over the next two to three days. Historically, the symptom window has been described as a rapid onset followed by a brief, intense phase.

In the past decade, surveillance data have recorded occasional extensions of the symptomatic window, especially in older adults or those with compromised immune systems. These extensions are not universal; they appear in a minority of cases and often coincide with delayed treatment or co‑infecting pathogens. Recognizing the baseline helps distinguish genuine trend shifts from isolated clinical variations.