Warming ocean waters are driving the northward spread of Vibrio bacteria along the US east coast, a development that scientists say could have global implications. The bacteria thrive in warm, brackish water and can cause severe infections, including flesh-eating disease, in people with open wounds or who consume contaminated raw shellfish.
Vibrio infections are the leading cause of shellfish-related illness in the US and have increased more than any other foodborne pathogen since monitoring began in 1996. Researchers attribute the rise to a combination of climate change, food handling practices, and globalisation. The bacteria become active in water above 60F and multiply rapidly as temperatures rise.
On Florida’s Pensacola Beach, researchers Bailey Magers and Sunil Kumar are monitoring Vibrio levels as part of an effort to create an early warning system for the eastern US. Their work aims to predict high concentrations a month in advance, potentially saving lives and limbs by alerting hospitals to prepare for an influx of infections.
While the study focuses on the US, the implications are global. A spike in Vibrio infections in Europe’s Baltic Sea in 2014 closely tracked a heatwave, and similar risks may emerge in UK waters as sea temperatures rise. The bacteria serve as a sentinel for changing marine conditions, warning of broader ecological shifts.
