V. vulnificus can infect people two ways: through wounds exposed to contaminated water—as in the man’s case—or, more commonly, through contaminated seafood. The bacteria can take up residence in the stomachs of shellfish, particularly oysters, as well as the intestines of fish. Either route can be gruesome. When ingested, the bacteria can release enzymes that neutralize stomach acids, then from there storm the intestines and can enter the blood.