What is Vibrio?  Vibrio is a type of bacteria that has been around for hundreds of millions of years; researchers have identified more than 70 species. These species are mostly harmless, but some can cause infection. The bacteria thrive in warm, brackish (slightly salty) water such as estuaries and bays, attaching themselves to plankton and algae and accumulating in prolific water-filtering species like clams and oysters. Serious infections typically happen either through exposure to an open wound in saltwater or, more rarely, ingestion of raw shellfish that contain the bacteria.  The concentration of Vibrio in coastal waterways is higher from May through October, when temperatures are warmer. Most U.S. cases are in the Gulf and Atlantic coastal regions. Vibrio is tasteless and odorless. The Centers for Disease Control and Prevention, or CDC, estimates that about 80,000 cases of vibriosis (an infection caused by the Vibrio bacteria) occur in the U.S. every year, resulting in about 100 deaths.…