Gram Negative Bacilli
An individual experiences diarrhea after eating raw shellfish in San Francisco. What is the most probable cause of the problem?
Vibrio parahaemolyticus is a halophilic bacterium that is NLF and Non-sucrose fermenting. It ferments sugars and gives string test positive.
a. Kanagawa phenomenon is positive.
b. It causes acute gastroenteritis following ingestion of contaminated seafood such as raw fish or shellfish.
c. After 12-24 hours, the patient develops nausea and vomiting, abdominal cramps, fever, and watery to bloody diarrhea. It is usually self-limited in 1-4 days, requiring only restoration of water and electrolytes.
d. All other answer options could produce episodes of gastroenteritis, but the halophilic nature of V. parahaemolyticus and seafood is recognized as a classic combination.