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MATERIALS AND METHODS
CHARACTERIZATION OF THE NATURALLY
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65 syndrome abdominal air sacs abdominal airsacculitis affected birds affected turkey agglutination air sac lesions antigen blood agar plates bursa of Fabricius caused by mycoplasmas cervical air sacs cervical osteoarthropathy syndrome cervical vertebrae characterized chickens colony forming units contagious bovine pleuropneumonia diagnosed as positive disease eggs etiologic etiologic agents examined experiment flock foci of mononuclear follicles foot pad gallisepticum gross airsacculitis gross lesions I I I I I infection in turkeys inoculated inoculum isolated joint lesions lesions caused lesions of airsacculitis lesions were seen lungs lymphoid meleagridis infection microscopic lesions mononuclear cells myco mycoplasma infection naturally occurring neck lesions necropsied occurring CO turkeys pathogenic Photomicrograph Xl20 Pleuropneumonia-like organisms pneumatized bones respiratory system seen in turkeys serological serological techniques spinal cord synoviae infection thoracic air sac thoracic and abdominal tissues turkey experimentally infected turkey poults tylosin units per 0.l weeks of age