University of North Carolina at Chapel Hill professor Dr. Rachel Noble tests beach water for Vibrio bacteria

Just southwest of New Orleans, in a tranquil fishing village on the Louisiana bayou, Linard Lyons spent the morning on his 19-foot boat, preparing crab traps for his grandchildren just like he had done thousands of times before.

This time, he noticed a tiny scratch on his leg – a scratch that nearly cost him his life.

Lyons went about his day but woke up the following morning feeling “delusional.” Feverish and vomiting, he initially thought he had just contracted a stomach bug, but then discovered a series of blackening sores spreading across his left leg.

From : CNN