Dr. Murai Éva szerk.: Parasitologia Hungarica 22. (Budapest, 1989)

Transmission and scanning electron microscopic observations on the body wall surface of Taenia hydatigena and its metacestode, Cysticercus tenuicollis (Cestoda: Cyclophyllidea) Dr. Yana MIZINSKA-BOEVSKA

1

, Dr. Olga POLJAKOVA-KRUSTEVA' and Dr. Éva FOK

2 Central Laboratory of Helminthology, Bulgarian Academy of Sciences, Sofia, Bulgaria' — Helminthological Research Laboratory, Department of Parasitology and Zoology, University of Veterynary Science, Budapest, Hungary

2 "Transmission and scanning electron microscopic observations on the body wall surface of Taenia hydatigena and its metacestode,! Cysticercus tenuicollis (Cestoda: Cyclophyllidea)" - Mizinska-ßoevska, Y., Poliakova-Krusteva, O. and Fok, É. - Parasit, hung., 22: 57-61. 1989. ABSTRACT. The tegumental surface of Taenia hydatigena Pallas, 1766 and its metacestode Cysticercus tenuicollis was studied by scanning and transmission electron microscopy. The outer part of the bladder wall and parts of the strobila of the taenia were studied with special attention to some differences in the density, form and structure of the microthriches and, as a result, in the relief of the surface in general. These specificities are connected with certain adaptations to the living conditions and reflect the growth and development of the taenia. The changes in the type of the free tegumental surface are related to the digestive functions of the teguments and to changes in the environment of the larval and the adult forms of Taenia hydatigena. KEY WORDS: Cysticercus tenuicollis. Taenia hydatigena, tegument, microthriches, scanning and transmission electron microscopy. The covering tissue (the tegument) of cestodes is a protective and metabolically active surface where the main host-parasite interactions take place. The lack of digestive system In the representatives of the class Cestoda strongly attracts the attention of scientists to the problem of studying the body wall. The present work is part of a series of morpho-functional studies of the tegument of Taenia, hydatigena and its larval form, Cysticercus tenuicollis- °ur aim was to study the topography and ultrastructure of the tegument surface of the larval and the adult forms. MATERIAL AND METHODS The larval form (c. tenuicollis) was acquired from naturally infected sheep, from peritoneal membranes, the liver peritoneum or the mesenterium. Our studies were confined to the bladder wall.