Parasitic Disease in Clinical Practice is the sixth mograph to appear in the w established and flourishing Bloomsbury Series in Clinical Science. Written by a distinguished authority in the field, the book gives a comprehensive and detailed description of parasitic infections and their clinical consequences. Such infections are longer confined to tropical parts of the world and w have a widespread distribution. Rapid advances are being made in understanding their epidemiology and in diagsing and treating particular infections. Current literature is largely directed to the parasites, their characteristics and their isolation; a clinical review is clearly needed. This has w been provided, for the author's stated objective is to inculcate a greater awareness, understanding and appreciation of human parastic disease in the minds of all clinicians . London, March 1990 Jack Tinker Preface Homo sapiens has always existed in a finely balanced equilibrium with a great diversity of infective agents, almost all of them of great antiquity. Many must have exerted a profound effect on the evolution of the human geme. While the average physician is usually aware of potentially pathogenic viruses, bacteria (and rickettsia), and to a lesser extent fungi, hislher kwledge of protozoan and helminthic infections is frequently imperfect and often rudimentary.