Three antimicrobial are approved to treat diseases in fishes caused by Aeromonas spp. US Food and Drug Administration Center for Veterinary Medicine: www.fda.gov m). However, strict guidelines on the usage labels limit treatments to diseases caused by A. sal momicida and A. hydrophila, and only among certain hosts, Ro- met 30 Aquaflora and Terramycin are approved to treat furunculosis in salmonid fishes, and Terramycin may be used uo treat bacterial hemorrhagic septicemia in catfish caused by A. hydrophila A. liquefaciens)