Echinococcus granulosus: Secretory activity of the rostellum of the adult cestode in situ in the dog
Thompson, R.C.A., Dunsmore, J.D. and Hayton, A.R. (1979) Echinococcus granulosus: Secretory activity of the rostellum of the adult cestode in situ in the dog. Experimental Parasitology, 48 (1). pp. 144-163.
*Subscription may be required
Secretary activities associated with the rostellum of adult Echinococcus granulosus were studied using histological, histochemical, and ultrastructural techniques, following rapid fixation of the cestodes in situ in the small intestine of the anaesthetised dog. Studies concentrated on the host-parasite interface from 30 to 35 days postinfection. At this time, contraction of the muscular rostellar pad appeared to be associated with extension of the apical rostellum into a crypt of Lieberkühn. Crypt invasion by the apical rostellum coincided with morphological changes and secretory activity in a group of modified tegumental cells, previously referred to as the rostellar gland. Secretory material, a cystine-rich protein, was observed in the nuclei and cytoplasm of the rostellar gland cells. Release of this material into the interface was seen only following crypt invasion by the apical rostellum. Although the mechanism of release is not clear, it may be analagous to holocrine secretory mechanisms, since apparent degeneration of the rostellar gland region was associated with secretion. Possible functional activities of the secretion associated with hook formation, nutrition, regulation, adhesion, and protection are discussed.
|Publication Type:||Journal Article|
|Murdoch Affiliation:||School of Veterinary Studies|
|Copyright:||© 1979 Published by Elsevier Inc|
|Item Control Page|