Used for Gastrointestinal and respiratory infections caused by micro-organisms sensitive to doxycycline and/or gentamicin caused by gram-positive and gram-negative bacteria, that cause Pullorum disease, CRD complex and Colibacillosis in poultry and in the treatment of infections caused by Campylobacter, Chlamydia, E. coli, Klebsiella, Haemophilus, Mycoplasma, asteurella, Rickettsia, Salmonella, Staphylococcus and Streptococcus spp