author(s)
Hamrat Khadidja and Yahia Achour

abstract
The present work was carried out on five livers and lungs with hydatid cyst, taken from seven 7-year-old camels. The method was based on classical techniques, namely histology, fixation, realization of inclusion, cutting, making slides, dewaxing, rehydration, staining, dehydration, editing and reading slides. The average diameter of the hydatid cyst varied between 0.5 and 1.3 cm and those pulmonary cysts vary between 1.5 and 2.2 cm. The results showed that the wall of the hydatid cyst was composed of the proliferous membrane, of the stratified membrane and the perikist. The connection between the parasite and the intermediate host tissue caused granulomatous local inflammation, a fact described even in other ruminants; cysts are observed at the early stage of degeneration and necrosis, with a large number of eosinophils observed outside lymphocytes. Finally, the histology of the hydatid cyst of the dromedary allowed us to identify layers constituting the parasite and to know the local reaction between host and parasite with appearance of the fertility cyst to distinguish it from other cysts of other species.