Gastrointestinal and respiratory infections caused by enrofloxacin-susceptible strains of E. coli, Pasteurella multocida, Mannheimia haemolytica and Mycoplasma spp. in cattle, E. coli and Staphylococcus aureus in sheep, E. coli, Pasteurella multocida, Mannheimia haemolytica and Mycoplasma spp. and Staphylococcus aureus in goats and Actinobacillus pleuropneumoniae, E. coli, Klebsiella spp., Pasteurella multocida and Mycoplasma spp. in pigs.