A recent study found that Hurricane Ian led to a spike in cases of vibriosis, a life-threatening illness caused by water-borne vibrio bacteria
Hurricane Ian slammed into southwest Florida as a Category 4 storm in September last year, killing 149 people — the most deaths attributable to a single hurricane in the state in nearly a century. But the official death count didn’t include one of the most gruesome ways people died as a result of the storm.
There are many species of Vibrio, including Vibrio cholerae — the cause of the diarrheal disease cholera, which kills tens of thousands of people per year in the Global South. Vibrio vulnificus, commonly referred to as “flesh-eating bacteria,” is less common globally but more deadly, and it’s becoming more pervasive in the U.S.
The study published this week, led by Rita Colwell, a microbiologist at the University of Maryland and one of the foremost Vibrio researchers in the nation, is among the first to make a direct link between a specific hurricane and a spike in cases of vibriosis. Colwell and her colleagues found that flooding brought on by Hurricane Ian caused millions of gallons of water to run into the ocean, carrying nutrients with it. The storm also stirred up sediment and warm water off the coast of Florida.
Colwell wasn’t surprised by her findings — the ocean water around Florida was abnormally warm last year and has continued to warm since. Her own prior research has shown that temperature anomalies lead to the growth of these harmful bacteria. Warm water also breeds stronger hurricanes, and adding a storm to conditions that already favored Vibrio had a predictable outcome. “We took samples and, sure enough, we found lots of Vibrio,” Colwell said.
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