RESUMO
100 camels were examined for hydatid cyst and revealed that the prevalence rate of cystic hydatidosis among camels in Assiut Govemorate was 9%. The lung was the most suitable place for cystic infection in camel than the liver. The fertility rate of the examined cysts was 80%. Hydatid cyst wall was better stained with PAS. Best carmine and Giemsa stains were very rapid effective methods for visualization of hydatid elements. Scanning electron microscope was used for the detection of ultrastructure features of hydatid sand. It revealed that camel strain has some specific characters including large sized rostellar hooks and presence of separation line between the scolex and the neck in the evaginated protoscolices. In top view the rostellum appeared to be formed of 3 successive concentric rings becoming smaller as they go upwards. This was shown for the first time in the present study. SDS PAGE was used for characterization of hydatid cyst fluid, protoscolices and laminated layer antigens separately. It revealed that protoscolices and laminated layer are the source of proteins in the hydatid fluid. Many protein bands ranged from 150-6 kD were detected by different stains. The pattern of these bands indicated that camel's hydatid cyst components differ from that of sheep and cattle