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Abstract
The incidence and geographical distribution of hydatidosis was examined in sheep from ten localities in Libya. A total of 402 cases of hydatid disease (7·85%) were confirmed in a total of 5118 sheep examined; 12·74% of adult sheep were infected, but only 0·29% of lambs.
The liver was the organ most commonly infected (97·26% of all infections), followed by the lungs (58.70%), kidneys (1·76%), spleen (0·74%) and heart, mesentery and muscles (0·24% each).
The intensity of infection varied from one to more than ten fertile or sterile cysts. Infections were light in 43·73% of livers and 47·03% of lungs, medium in 33·24% of livers and 42·79% of lungs, heavy in 13·55% of livers and 7·62% of lungs, and very heavy in 9·96% of livers and 2·54% of lungs.
A total of 73·13% of the infections were found to be fertile, 18·90% sterile and 7·96% both sterile and partly calcified. Lung hydatids tended to be more fertile than liver cysts.
