Hydatid cyst is a neglected zoonotic disease caused by the larval stage of a tapeworm named Echinococcus Granulosus. Humans can accidentally get infected by ingesting the eggs of the tapeworm through consuming contaminated food or water or from direct fecal contact of infected dogs. Although CE have been found all around the world, generally high infection rates are seen where domestic livestock is raised in association with dogs. The aim of this study is to highlight the prevalence of cystic echinococcosis surgical cases in Hamadan city, (2015-2016).

All patients who had went under CE surgery of besat hospital in Hamadan city, were enrolled as participants in the study. Epidemiological and clinical data were collected for each patient. Information was collected using a questionnaire and all of the data were analyzed using SPSS-21.

During the period of study, A total of 63 patients(38 case for the year of 2015 and 36 case for the year of 2016) were operated for hydatidosis. The infection rate was higher in males (36 case, 57.1%) than females (27 case, 42.9%). The liver was the most frequently infected organ 32 patients, (51%).

The frequency rate of hydatid cystic in 2016 (25 case) were operated less than in 2015(38 case). The public health authorities should promote public knowledge regarding prevention and control methods of disease through mass media such as brochures and radio programs.