[The ultrastructure of sterile larvocysts of Echinococcus granulosus from different hosts].

The sterile larvocysts of Echinococcus granulosus are characterized by host-dependent morphological variability. The distinctions reside in the intensity of germinative layer development, glycogen and lipid content, ultrastructure of the tegument distal cytoplasm. The larvocysts obtained from one host species in different geographic zones of the country are morphologically similar. The sterile Echinococcus granulosus larvocysts obtained upon experimental infection of mice demonstrate typical morphological signs of the strain used for infection.