Treatment of the respiratory tract and of the digestive tract infections caused by the following bacteria susceptible to enrofloxacin: Chickens Mycoplasma gallisepticum, Mycoplasma synoviae, Avibacterium paragallinarum, Pasteurella multocida, Escherichia coli. Turkeys Mycoplasma gallisepticum, Mycoplasma synoviae, Pasteurella multocida, Escherichia coli. Rabbits For the treatment infectious diseases due to Pasteurella multocida and bacterial enteritis due to infection with E. coli