A Presumed Sensory Structure Associated with the Tegument of Schistosoma mansoni

摘要: A sensory structure located in the tegument of Schistosoma mansoni adults is described. The consists a bulb bearing an apical cilium which projects into surrounding medium. apparently lies at end neuron. Both and are enclosed by it speculated that unit may function to detect direction flow In study fine nervous system Fasciola hepatica cercaria Dixon Mercer (1965) described presumed tangoreceptor unique structure. morphologically similar was commonly observed during investigation this paper. MATERIALS AND METHODS Infected albino mice obtained from Wellcome Research Laboratories, Beckenham, were killed cervical dislocation. Worms removed immediately fixed both copula singly for 1 2 hr chilled 4% glutaraldehyde buffered pH 7.2 with phosphate. worms then post-osmicated 2% osmium tetroxide 7.4 veronalacetate. Whole or pairs embedded Araldite (Luft, 1961). Thin sections cut glass knives on L.K.B. ultramicrotome mounted bare grids. stained 15 min saturated solution uranyl acetate 50% alcohol 5 lead citrate (Reynolds, 1963). material examined A.E.I. 6B electron microscope micrographs taken magnifications 5,000 30,000 subsequently enlarged photographically as required.