Cover Image: This scanning electron micrograph (SEM) depicts a grouping of Vibrio vulnificus bacteria; mag. 13184x. Vibrio vulnificus normally lives in warm seawater and is part of a group of halophilic vibrios. V. vulnificus can cause disease in those who eat contaminated seafood or have an open wound that is exposed to contaminated seawater. V. vulnificus bloodstream infections are fatal about 50% of the time. Image courtesy of CDC/Janice Haney Carr/colorized by James Gathany (CDC-PHIL ID#7815).