Advances in PARASITOLOGY VOLUME 36 Editorial Board C. Bryant Division of Biochemistry and Molecular Biology, The Australian National University, Canberra, A.C.T. 0200, Australia M. Coluzzi Director, Istituto di Parassitologia, Universita Delgi Studi di Roma “La Sapienza”, P. le A. Moro 5, 00185 Roma, Italy C. Combes Laboratoire de Biologie Animale, UniversitC de Perpignan, Centre de Biologie et d’Ecologie Tropicale et MCditerranCenne, Avenue de Villeneuve, 66860 Perpignan Cedex, France S.L. James Chief, Parasitology and Tropical Diseases Branch, Division of Microbiology and Infectious Diseases, National Institute for Allergy and Infectious Diseases, Bethesda, MA 20892-7630, USA W.H.R. Lumsden 16A Merchiston Crescent, Edinburgh EHlO 5AX, UK Lord Soulsby of Swaffham Prior Department of Clinical Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 OES, UK K. Tanabe Laboratory of Biology, Osaka Institute of Technology, Ohmiya, Asahi-Ku, Osaka 535, Japan K.S. Warren Comprehensive Medical Systems, Inc., 461 Fifth Avenue, New York, NY 10017, USA P. Wenk Institut fur Tropenmedizin, Eberhard-Karls-Universitat Tubingen, D7400 Tubingen 1, Wilhelmstrasse 3 1, Germany Advances in PARASITOLOGY Edited by J.R. BAKER Royal Society of Tropical Medicine and Hygiene, London, England R. MULLER International Institute of Parasitology, St Albans, England and D. ROLLINSON The Natural History Museum, London, England VOLUME 36 ACADEMIC PRESS Harcourt Brace & Company, Publishers London San Diego New York Boston Sydney Tokyo Toronto ACADEMIC PRESS LIMITED 24/28 Oval Road LONDON NW 1 7DX United States Edition published by ACADEMIC PRESS INC. San Diego CA 92 10 1 Copyright 0 1995, by ACADEMIC PRESS LIMITED This book is printed on acid-free paper All Rights Reserved No part of this book may be reproduced in any form by photostat, microfilm, or any other means, without written permission from the publishers A catalogue record for this book is available from the British Library ISBN 0-12-031736-2 Typeset by J&L Composition Ltd, Filey, North Yorkshire Printed in Great Britain by the University Press, Cambridge CONTRIBUTORS TO VOLUME 36 C.E. BENNETT, Department of Biology, Southampton University, Southampton SO16 7PX, UK I.F. BURGESS,Medical Entomology Centre, University of Cambridge, Cambridge Road, Fulhourn, Cambridge CBl 5EL, UK A.J. DAVIES, School of Life Sciences, Kingston University, Penrhyn Road, Kingston Upon Thames, Surrey KTI 2EE, U K I. KANEV,Institute of Parasitology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria P.M. NOLLEN, Department of Biological Sciences, Western Illinois University, Macomb IL 61455, USA J.D. SMYTH, 3 Braid Mount View, Edinburgh EHl0 6JL, UK M. TIBAYRENC, UMR CNRSIORSTOM 9926, GCnCtique molkculaire des Parasites et des Vecteurs, ORSTOM, Centre de Montpellier, 91 I avenue Agropolis, BP 5045, 34032 Montpellier Cedex 01, France This Page Intentionally Left Blank Desmond Smyth has had a long and distinguished career researching in many branches of parasitology in universities in Britain, Ireland and Australia; here, he has reviewed recent discoveries on helminth zoonoses. While at least 150 parasitic zoonoses have been recognized worldwide, only a few helminth species have been considered important public health or veterinary problems. However, Professor Smyth discusses recent information on species