میزان شیوع ، باروری و سایر خصوصیات کیست های هیداتیک در دامهای کشتاری شهر همدان در سال 1377

Hydatidosis is a widespread zoonosis infecting a large number of    animals and humans. Human hydatidosis is a common disease in different    parts of Iran especially in Hamadan province. Many cases of cysts are    operated every year in regional hospitals. Animal echinococcosis    prevalence was determined by necropsy examination of viscera from    domestic slaughtered animals, including sheep, goats and cattle.           After inspecting viscera for hydatid cyst, unilocular cysts produced by    E. granulosus were recovered from 212 out of 2000 domestic herbivores    (1547 sheep, 333 cattle and 120 goats) slaughtered  in Hamadan abattoir.    The number of cyst of different organs was counted and their diameter was    measured. Thereafter, by dissecting the cysts, the volume of hydatic fluid   was measured, and their fertility was determined by finding protoscoleces    and the number of protoscolex per/ml fluid was counted.             The frequency of presumptive liver/abdominal, lung, and liver-lung    hydatid cyst was 15.3% (51/333), 10.6% (159/1547) and 1.7% (2/120) for    cattle, sheep and goats respectively. The fertility rate of hydatid cysts in    sheep, cattle, and goats recorded as 35.2.%, 23.5% and 0% respectively. The    huge dispersed slaughtering of sheep for various purposes  and the large    number of dogs allowed access to the offal coupled to the hundred    thousands number of sheep slaughtered in Haj Pilgrim days, indicates that,    the sheep is the most significant host for  maintaining the life cycle of the    parasite in Iran.           We demonstrated a high prevalence of animal echinococcosis in this    mountainous , agricultural province of Iran.