Signs & Symptoms

Increase in Vibrio parahaemolyticus illnesses associated with consumption of shellfish from several Atlantic coast harvest areas, United States, 2013

• Symptoms of Vibrio parahaemolyticus infection usually occur within 24 hours (range, 4-96 hours) after ingesting the bacteria.
• Symptoms of Vibrio parahaemolyticus infection may include:
  • Watery diarrhea
  • Abdominal cramps
  • Nausea
  • Vomiting
  • Fever
  • Headache
  • Bloody diarrhea

Treatment

• Illness typically lasts 1 to 7 days. Treatment is not necessary in most cases. Severe illness is rare and occurs most often in persons with weakened immune systems.