Introduction: Plesiomonas shigelloides gastroenteritis is rare in humans and occurs following the consumption of raw seafood, contaminated water and oysters containing the microorganism.
Clinical Picture: We describe a case of a young healthy lady, who had severe gastroenteritis after eating undercooked fish at hawker centre. The stool culture grew positive for Plesiomonas shigelloides.
Treatment and Outcome: She was treated with intravenous ceftriaxone and later changed to oral ciprofloxacin. She was discharged well.
Conclusion: Plesiomonas shigelloides should be diagnosed and treated early as can cause severe gastroenteritis even in young healthy individuals. Untreated infections can be severe and fatal especially in immunocompromised hosts. Prevention of infection is the key and can be done by avoiding the consumption of raw seafood, contaminated water and oysters containing the microorganism.