Background:Cystic echinococcosis or hydatidosis is caused by the larval stage of the tapeworm Echinococcus granulosus, is one of the most important parasitic infestations in livestock worldwide and one of the most important parasitic zoonoses. A crosssectional study was conducted to estimate the prevalence of hydatidosis in humans in Baghdad governorate and determine the risk factors associated with disease occurrence. Methods: After collecting hydatid cysts from patients was done to determine the presence of hydatid cysts in human . The viability and fertility tests were done on all of the cysts collected during the study. A questionnaire survey to identify risk factors of transmission was also carried out. Results: A total of sixty (60) cases of human hydatidosis were collected ,(73%) were liver cyst ,(20%) were lung cyst, (3%) cyst were in liver and lung and (3%) were liver ,lung and spleen .Our result was showed after viability examination ,(47%)of cyst were fertile ,(37%)cyst were steriale,(10%) cyst were calcified and (7%) cyst were under developed.sixty (60%) were femals and (40%) were males. Conclusion: The study has established that hydatidosis is prevalent in humans in Baghdad governorate and that the risk factors for its transmission exist. The disease health concern

Abstract:Background Result: Most of the CE patients(60) patients were found to be infected with hydatid cyst of eitherG4 26(43%),G1/G/G3 18(30%), G5 12(20%),G6/G7 4(7%). And the study the association of genotypes and organ ,our results show In the liver (20%) G1/G/G3 ,(27%)G4 ,(7%) G5 ,(20%) G6/G7. Lung (7%) G1/G/G3,(10%)G4,Liver and lung (3%) G1/G/G3 andG4 ,finally liver ,lung and spleen (3%) G1/G/G3. Conclusion