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.