The purpose of this study is to determine the incidence of hydatidosis in humans in Bucharest, over a period of time and the category of age at highest risk of contamination with E. granulosus sp. Setting annual growth rate of new cases of hydatidosis in human populations was done using the database provided by the National Center for Organization and Information System and Information Assurance in Health, Bucharest, Romania. The database was the number of cases of illness occurred annually during 2000-2005, in Bucharest, the ratio of family doctors and hospital doctors in specialty reporting. Epidemiological assessment took account of hydatidosis and age group affected, so that data interpretation was made for four age groups (under one year old, 1-14 years, 15-64 years, over 64 years). Research methodology consisted of retrospective analysis, based on analytical investigations using statistical processing of data from quantitative assessment of epidemiological parameters (incidence). Thus were established as the age category with the highest degree of contamination with E. granulosus and temporal distribution of new cases of disease occurred during the six years of epidemiological monitoring. The data of the present study indicated that the rate of infestation with E. granulosus in the youths and old people was higher than in the infant people