STUDY OF SOME BIOLOGICAL CHARACTERISTICS OF HYDATID CYSTS IN EQUINE .

Abstract

The present study was implemented to identify some of the biological characteristics of 198 hydatid cysts in Equine of 19 natural infected slaughtered donkeys in Al-zawra park Zoo in Baghdad from 1/11/2001 till 31/10/2002. The result revealed that the diameter of hydatid cyst varies from (0.2-9.2) cm . The diameters ratio of hydatid cysts in female is higher than that of male in static significant of p<0.05 . The cysts were unilocular, rounded and easy to open (ex- cept the caseated and calcified cysts). Furthermore, no daughter cysts were found. Hydatid fluid was clear for the most hydatid cysts. The volume of such fluid ranged between (0.4-170) ml. The protoscoleses were white in color –except in two cysts with diameter (8.4cm and 9.2 cm are sandy in color. The number of protoscoleses ranged between 3-973040 and 12-983350 protoscoleses in male and female respectively . The viability of hydatid cysts ranged from (0%-99.88%) The fertility percentage of the cysts was 45.25%, The results of the present study indicate no relation among diameter of hydatid cysts, fertility, and quantity of protoscoleses inside the cysts and viability of protoscolises .