Last year, for instance, a team led by aquatic ecologist Gregory Ruiz of the Smithsonian Environmental Research Center in Edgewater, Maryland, found that
ballast water from ships entering the Chesapeake Bay
contained Vibrio cholerae, the bacterium that causes cholera.
Although no cases of cholera were reported in Alabama,
ballast -
water samples collected later
contained the epidemic - causing strain of cholera, and this incident highlighted the capability of
ballast water to transport pathogens.