| Popis: |
CHRONIC respiratory disease of poultry (CRD) was first reported in the United States by Delaplane and Stuart in 1943. Its importance is evidenced by the United States Department of Agriculture report that the annual loss due to CRD is 25 million dollars. (United States Department of Agriculture, 1956). The high incidence of CRD of chickens and infectious sinusitis of turkeys (IS) has directed increased attention in the past few years toward an effort to control or perhaps eradicate these diseases. Many investigators have concluded that PPLO play an important role in CRD of chickens and IS of turkeys. It has been stated that both diseases, CRD and IS, are caused by the same agent (Reagan et al., 1951; and Grumbles et al., 1952). This investigation was designed to determine the antibiotic sensitivity of PPLO using erythromycin glucoheptane, chlortetracycline, hygromycin, magnamycin, oxytetracycline and streptomycin. Nelson (1935) described small pleomorphic organisms associated . . . |
