ABSTRACT
In this study, we collected 100 samples of liver hydatid cyst and blood of infected sheep from the Ahvaz abattoir. The existing Ca, P, Mg, Na and K were measured by an auto analyzer apparatus. The result of T. student test showed that there are a significant difference between serum and fluid of cyst in all electrolytes [p<0.05]. There was also a significant difference between these electrolytes in infected sheep and normal sheep [p<0.05]. These results confirmed that the entrance of essential electrolytes have depended on selective permeability and parasite requirement. Ca and P have vital roles in the prevention of hydatid cyst fluid acidity. Understanding parasite nutrition behavior would help us to conduct a better drug treatment in inoperative cyst via selection of effective drug and adherence of this drug to biological material that promote distribution of drug to the cyst