Vibrio vulnificus (V. vulnificus) are bacteria that live in warm seawater and require salt to live. V. vulnificus infections are caused by eating seafood containing the bacteria or by exposing an open skin wound to seawater with high amounts of the bacteria. Eating contaminated seafood causes diarrhea, abdominal pain, and vomiting. Open wound exposure can cause skin breakdown and ulcers. For people with weakened immune systems that cannot fight off the bacteria, the infection can spread to the bloodstream, increasing the risk of death. V. vulnificus infections are treated with antibiotics. Avoiding raw seafood and shellfish as well as avoiding contact of open skin wounds with warm saltwater can prevent a V. vulnificus infection.