Dangerous Bacteria

• Raw or undercooked oysters are potentially hazardous because of bacteria formally known as Vibrio vulnificus. These bacteria increase in abundance when temperatures are warm, making the threat of illness greater in the warmer weather months.
  
  

Symptoms of Vibrio Vulnificus Infection

• When tainted oysters are consumed raw or undercooked, at-risk individuals may develop symptoms of gastroenteritis: pain and cramping in the stomach, diarrhea and vomiting. More severe symptoms of infection include a sharp decrease in blood pressure, high fever and chills, and blisters or painful skin lesions. Any sickness following the consumption of oysters should be addressed by a physician.
  
  

At-Risk Individuals

• Most healthy people are not at risk for severe Vibrio infections. People with the following health conditions, however, should avoid them altogether: cancer, liver disorders, diabetes, gastrointestinal disorders or compromised immune systems.
  
  

Tips

• Any person who chooses to consume raw oysters should always exercise caution. Raw oysters that have been left to sit at room temperature should always be avoided.
  
  

Misconceptions

• The only way to be completely safe from Vibrio bacteria is to make sure the oysters are thoroughly cooked. Adding hot sauce to or consuming alcohol with raw oysters will not kill harmful bacteria.