Maryland Officials Warn of 80-Plus Vibrio Species in Chesapeake Bay as Summer Heat Raises Risk
Updated
Updated · Bay Net · Jul 21
Maryland Officials Warn of 80-Plus Vibrio Species in Chesapeake Bay as Summer Heat Raises Risk
3 articles · Updated · Bay Net · Jul 21
Summary
Maryland health officials issued a summer warning that naturally occurring Vibrio bacteria are becoming more common in the Chesapeake Bay and its rivers as warm, brackish water conditions intensify.
Two main exposure routes drive the risk: open cuts contacting Bay water and eating raw or undercooked shellfish—especially oysters, which can carry the bacteria.
People with weakened immune systems, liver disease, diabetes, kidney disease, recent wounds or surgery, and older adults face the highest risk of severe illness, though infections remain rare.
State guidance centers on waterproof bandages, washing cuts promptly, wearing gloves or water shoes when handling seafood or gear, and thoroughly cooking shellfish instead of eating them raw.
NOAA's short-term model can give Maryland and Virginia up to a 2-day early warning of Vibrio vulnificus likelihood, while local officials also urge checking beach advisories after heavy rain.