The vaccination is accomplished by immersing the fish into a solution harboring the attenuated A. salmonicida for 60 seconds. The process is recommended on small fish, usually about 2? in length, and is then repeated when they reach 2.5?. Overall, 30,000 rainbow trout, and 20,000 coaster brook trout were vaccinated this year. Once the young trout are vaccinated, they remain on the hatchery for another year attaining 9-11 inches in length. Fish may be carriers of the disease without showing any clinical signs, which is why hatchery fish are periodically tested by the La Crosse Fish Health Center. Fortunately, Genoa NFH has been A. salmonicida free since the inception of the vaccination process. The certified "clean" trout are eventually stocked with the cooperation of tribal and state governments from Wisconsin, Minnesota and Michigan. For more information on these or other fishery programs at Genoa National Fish Hatchery contact Doug Aloisi or Roger Gordon at 608-689-2605