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A Florida man nearly lost his leg from a rare flesh-eating bacterial infection that developed after he was bitten by a human while breaking up a family brawl, according to a report by NBC News .

The man, Donnie Adams, a 53-year-old funeral assistant from the Tampa suburb of Riverview, sought care in mid-February for a painful swelling on this bitten thigh. He told doctors he had gotten the bite while trying to break up a physical fight between two family members. He was bitten in the process of pulling the pair away from each other.

He reportedly declined to say what sparked the brawl or which family member actually bit him. But doctors believed his story after seeing the wound.

Enlarge / Magnified view of Vibrio vulnificus bacteria. (credit: Smith Collection/Gado via Getty Images )

Cases of a potentially fatal infection from a seawater-borne pathogen have increased off the US Atlantic coast as ocean waters warmed over the last 30 years and are expected to rise further in future because of climate change, according to a study published on Thursday by Scientific Reports, an open-access journal for research on the natural sciences and other topics.

The incidence of infections from Vibrio vulnificus , a pathogen that thrives in shallow, brackish water, was eight times greater in the Eastern US in 2018 than it was in 1988, and its range shifted northward to areas where waters were previously too cold to support it, according to the paper, “Climate Warming and Increasing Vibrio Vulnificus Infections in North America,” by academic researchers in the US, England, and Spain.

By the middle of the 21 ^st century, the pathogen is expected to become more common in major population centers, including New York City, and by the end of the century, infections may be present in every US Atlantic coast state if carbon emissions follow a medium- to high-level trajectory, the report said.