title: Notes on the occurrence of tubercular spines in Schistosoma margrebowiei and Schistosoma mattheei.
abstract: Scanning electron microscopical (SEM) studies on the tegument of the bovid schistosomes, Schistosoma margrebowiei and Schistosoma mattheei have yielded conflicting results; certain authors observed the tubercles on the tegument of these species to be spined, while others reported that they are spineless. The present study indicates that the protrusion of tubercular spines is subject to phenotypic plasticity regulated by external factors such as the identity of the host species and whether or not the schistosome is paired.
authors.affiliation: Research Institute for Diseases in a Tropical Environment, South African Medical Research Council, Nelspruit.
authors.forename: F J
authors.initials: FJ
authors.lastname: Kruger
authors.forename: V L
authors.initials: VL
authors.lastname: Hamilton-Attwell
authors.forename: L
authors.initials: L
authors.lastname: Tiedt
authors.forename: P S
authors.initials: PS
authors.lastname: Visser
authors.forename: P H
authors.initials: PH
authors.lastname: Joubert
mesh_terms: D000818:Animals; D002417:Cattle; D008297:Male; D012547:Schistosoma / Q000648:ultrastructure*