Quote from GCHD:
“About Vibrio vulnificus
Vibrio vulnificus is not associated with pollution and is not unique to the Gulf of Mexico, Texas or Galveston. The bacteria is naturally present in salt and brackish water around the world. Infections from Vibrio vulnificus are rare and typically affect people with pre-existing health conditions who had open cuts or sores when they came into contact with the bacteria.
More than 10 million people visited Texas beaches in 2015 and less than 0.00035% acquired Vibrio vulnificus. Most of those who get infections recover without long-term health consequences. By comparison, 100 times as many people were killed in vehicle crashes in Texas during the same year.”
More at the website.