Swabs from trachea, sinuses and air-sacs taken from chickens, turkeys and ducks of different ages revealed the presence of M. gallisepticum (24 and 32%) in chickens and turkeys respec tively, M. meleagridis (30%) were detected in infected turkeys, while M. anatis (16%), M. gallinarum (24%), M. iners (14%), A. laidlawi (28%) and A. axanthum (32%) were recovered from ducks. These isolates were found in association with E. coli, Pseud. aeuroginosa, Staph. aureus and S. gallinarum pullorum. All isolates showed high sensitivity to josamycine, moderate sensitivity to lincomycine and low variable sensitivity to other antibiotics. Incubated turkey-eggs from infected farm showed good elemination of mycoplasma after dippoing in josamycine solution, while inferior results were obtained with doxycyline and tylosin-tartarate treatment.