Echinococcusis or hydatid cyst is considered as one of the major zoonosis infection in Iran that causes
many problems in communities. The aim of this study was to evaluate the rate of hydatid cyst operated in
hospitalized patients in the famous hospitals of Isfahan and Najafabad city, the central region of Iran from
2000-2011. In this descriptive study file of 148 hospitalized patients who underwent surgery for Hydatid
cyst during 2000 -2011 in Isfahan and Najafabad were panalyzed. In this survey, the highest rate of
hydatidose was related to 21-30 age groups. Infection rate in females was higher than that in males
(58.1% va 41.9% respectively). Cyst involvement of different organs was as follows: liver (57.4%) lung
(36.5%) liver and lung togther (3.4%) and other organs (2.7%). The result show that in human all age
groups and both sexes are exposed to hydatidosis, therefore appropriate control method is needed to
prevent this zoonotic disease.