Gastrointestinal and respiratory infections caused by tylosin and doxycycline sensitive micro-organisms, like Bordetella, Campylobacter, Chlamydia, E. coli, Haemophilus, Mycoplasma, Pasteurella, Rickettsia, Salmonella, Staphylococcus, Streptococcus and Treponema spp., in calves, goats, poultry, sheep and swine.