Based on papers presented at the XI International Congress for Tropical Medicine and Malaria, this publication provides an authoritative evaluation of treatment and control of helminth parasite infections. A section on leprosy and a brief review of malaria vaccination are included. A comprehensive review of the history of schistosomiasis control programs presents information unavailable elsewhere. This book is of special interest to professionals concerned with health problems of less developed countries and in particular to public health officials, epidemiologists and clinicians dealing with patients in or returning from the tropics.