Cover image

ON THE COVER: Schistosoma mansoni: these flukes live in the mesenteric veins of humans (and experimentally infected animals, e.g. mice). The male schistosome carries the thinner female in his "gynecophoric canal". Note the suckers, particularly large on the male, which allow these worms to attach to and "walk" along the endothelia of blood vessels, despite the blood stream. Photo and caption courtesy of Prof. Andreas Ruppel, University of Heidelberg, Heidelberg, Germany. Reproduced with permission. Copyright 1986 Andreas Ruppel. All rights reserved. See related article: Schistosomiasis - An Unusual Cause of Ureteral Obstruction. A Case History and Perspective pp. 216–227