Which Vibrio species is closely associated with rapidly progressing wound infections in patients with underlying liver disease?

• A. Vibrio vulnificus
• B. Vibrio alginolyticus
• C. Vibrio cholerae
• D. Vibrio parahaemolyticus

Answer: (A)

Vibrio vulnificus is the organism most strongly linked to rapidly progressive wound infections in people with underlying liver disease. It thrives in warm coastal waters and can cause severe skin and soft tissue infection after a wound is exposed to seawater or after consuming contaminated seafood. Patients with liver disease, especially cirrhosis or iron overload, are particularly susceptible because excess iron in the blood promotes rapid bacterial growth and their immune defenses are compromised. The bacterium has virulence factors such as a protective capsule that helps it resist phagocytosis and spread quickly through tissues, leading to necrotizing infections and septicemia with high mortality if not treated promptly. Other Vibrio species cause different syndromes (for example, cholera from toxin-producing strains causes severe diarrhea; some species cause gastroenteritis or milder wound infections) and are not as tightly associated with rapidly progressive wound infections in the setting of liver disease.