A total of 5500 slaughtered carcasses (Camel, cattle, sheep and goats) were investigated for the detection and the predilection seat of hydatid cysts in Zagazig and Belbis abattoirs in Sharkia Province during the period from August 2008 to July 2009. The infestation rate was 3.5, 3, 3.9 and 4.5 % in the carcasses of camel, cattle, sheep and goats, respectively. The high incidence was in lungs 58%, followed by livers 39%, and the low percentages were in the spleen 0.02% and heart 0.01% . Suggestive control measures and public health hazard were mentioned.