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Almost 50 million persons visit another continent each year. It is mainly those 15-18 million travelers from industrialized nations who visit or reside in developing countries that are at increased health risk. To develop effective health protection advice, the health risks of travel and the benefits of prophylaxis (vaccines, new and old drugs, behaviour modification, etc.) should be assessed systematically. The purpose of this book is to improve the protection of the travelers' health by more effective and more uniform recommendations. It contains many data on recent research and represents the first comprehensive account on travel medicine for professionals.
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R. Steffen, H. O. Lobel, 1. Haworth, D.1. Bradley (Eds.) Travel Medicine Proceedings of the First Conference on International Travel Medicine, ZUrich, Switzerland, 5-8 April 1988 With 83 Figures and 138 Tables Springer-Verlag Berlin Heidelberg New York London Paris Tokyo HongKong PD Dr. med. Robert Steffen Institut fUr Sozial- und Praventivmedizin der Universitat Zurich, SumatrastraBe 30, CH-8006 Zurich, Switzerland Dr. Hans Lobel Malaria Branch, Centers for Disease Control Atlanta, GA 30333, United States of America I>r.JamesHaworth Chemin Roitelet 5, CH-1292 Chambesy, Switzerland Professor David J. Bradley MA, DM, FRCPath, FFCM, FRCP, FlBiol, Hon. FlPHE London School of Hygiene and Tropical Medicine Keppel Street, London WCLE 7HT, England ISBN-13:978-3-642-73774-9 e-ISBN-13:978-3-642-73772-5 DOl: 10.1007/978-3-642-73772-5 Library of Congress Cataloging-in-Publication Data Conference on International Travel Medicine (1st: 1988: Zurich, Switzerland) Travel medicine. proceedings of the First Conference on International Travel Medicine, Zurich, Switzerland, 5---S April 1988 /R. Steffen ... let aI.] (eds.). ISBN-13:978-3-642-73774-9{U.S.: alk. paper) 1. Travel- Health aspects - Congresses. 2. Travel- congresses. I. Steffen, Robert. II. Title IDNLM: 1. Preventive Medicine-congresses. WA 110 C7485t 1988] RA783.5.C66 1988 613.6'8-dc20 DNLM/DLC89-10114 This work is subject to copyright. All rights are reserved, whether the whole of part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in other ways, and storage in data banks. Duplication of this publication or parts thereofis only permitted under the provisions of the German Copyright Law of September 9,1965, in its version of June 24,1985, and a copyright fee must always be paid. Violations fall under the prosecution act of the German Copyright Law. © Springer-Verlag Berlin Heidelberg 1989 Softcover reprint of the hardcover 1st edition 1989 The use of registered names, trademarks, etc. in the publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Product Liability: The publisher can give no guarantee for information about drug dosage and application thereof contained in this book. In every individual case the respective user must check its accuracy by consulting other pharmaceutical literature. Typesetting: Briihlsche Universitatsdruckerei, Giessen 2119/3020-543210 - Printed on acid-free paper Preface The interest in health problems of travelers has grown as transportation has become faster and many distant places have become accessible for millions of travelers (Fig. 1). This interest was evidenced by the attendance at the First Conference on International Travel Medicine in Zurich, Switzerland, 4-8 April 1988. The conference was cosponsored by the World Health Organization, the World Tourism Organization, the US Centers for Disease Control, the London School of Hygiene and Tropi