title: Ultrastructural study of the tegument of Cotugnia polyacantha and Killigrewia streptopelia inhabiting the dove Streptopelia senegalensis aegyptiaca.
abstract: The ultrastructure of the teguments of the cyclophyllidean cestodes Cotugnia polyacantha and Killigrewia streptopelia naturally infecting the dove Streptopelia senegalensis aegyptiaca, was studied using transmission electron microscopy. The two cestodes inhabit two distinct sites in the small intestine of the same bird. Observations revealed basic similarity between the two cestodes, though, marked differences between the tegument structure details of the two species regarding the structure and dimension of microtriches, types and distribution of vesicles among the regions of the tegumental/perikaryal complex, structure of subtegumental connective tissue and subtegumental muscle layer. The significance of these observations was discussed in possible relation to the different physico-chemical environments known to occur where each cestode resides.
authors.affiliation: Department of Zoology, Faculty of Science, Tanta University, Egypt.
authors.forename: A I
authors.initials: AI
authors.lastname: Seif
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000469:parasitology*; D002589:Cestoda / Q000648:ultrastructure*; D002590:Cestode Infections / Q000469:parasitology / Q000662:veterinary*; D010856:Columbidae / Q000469:parasitology*; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D008854:Microscopy, Electron