Georgis' Parasitology for Veterinarians, 9th Edition

1447 Pages·2008·32.91 MB·English

by  Dwight D. Bowman MS PhD

GEORGIS’ PARASITOLOGY FOR
VETERINARIANS
NINTH EDITION
DWIGHT D. BOWMAN, MS, PhD
Professor of Parasitology, Department of Microbiology and Immunology,
College of Veterinary Medicine, Cornell University, Ithaca, New York
Copyright
SAUNDERS
ELSEVIER
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GEORGIS’ PARASITOLOGY FOR VETERINARIANS, Ninth Edition
ISBN: 978-1-4160-4412-3
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Notice
Knowledge and best practice in this field are constantly changing. As
new research and experience broaden our knowledge, changes in
practice, treatment and drug therapy may become necessary or
appropriate. Readers are advised to check the most current information
provided (i) on procedures featured or (ii) by the manufacturer of each
product to be administered, to verify the recommended dose or
formula, the method and duration of administration, and
contraindications. It is the responsibility of the practitioner, relying on
their own experience and knowledge of the patient, to make diagnoses,
to determine dosages and the best treatment for each individual patient,
and to take all appropriate safety precautions. To the fullest extent of
the law, neither the Publisher nor the Editors assumes any liability for
any injury and/or damage to persons or property arising out or related
to any use of the material contained in this book. The Publisher ISBN:
978-1-4160-4412-3
Library of Congress Cataloging-in-Publication Data
Bowman, Dwight D.
Georgis' parasitology for veterinarians. – 9th ed. / Dwight D.
Bowman.
p. ; cm.
Includes bibliographical references and index.
ISBN 978-1-4160-4412-3 (pbk. : alk. paper) 1. Veterinary
parasitology. I. Georgi, Jay R., 1928-II. Title.
III. Title: Parasitology for veterinarians.
SF810.A3B74 2009
636.089'696–dc22
2008031763
Vice President: Linda Duncan Publisher: Penny Rudolph Managing
Editor: Jolynn Gower Publishing Services Manager: Patricia Tannian
Senior Project Manager: Anne Altepeter Design Manager: Amy Buxton
Printed in China
Last digit is the print number: 9 8 7 6 5 4 3 2 1
Saunders Elsevier
Contributors
Mark L. Eberhard, PhD , Chief, Biology and Diagnostics Branch,
Division of Parasitic Diseases, National Center for Infectious
Diseases, Centers for Disease Control, Atlanta, Georgia,
Histopathologic Diagnosis
Marshall W. Lightowlers, BSc Hons, PhD , Professor, Veterinary
Science, The University of Melbourne, Werribee, Victoria,
Australia, Commercial Antiparasite Vaccines (Table A-7)
Susan E. Little, DVM, PhD , Endowed Chair Professor, Krull-Ewing
Chair in Veterinary Parasitology, Department of Veterinary
Pathobiology, Center for Veterinary Health Sciences, Oklahoma
State University, Stillwater, Oklahoma, Vector-Borne Diseases
Randy C. Lynn, MS, DVM, DACVCP , Director, Professional Services
Group, IDEXX Pharmaceuticals, Inc., Greensboro, North Carolina,
Antiparasitic Drugs
Preface
In the ninth edition of Georgis’ Parasitology for Veterinarians, the text
begun by Jay and Marion Georgi, I have worked to change most of the
images to a color format. Fortunately, many of the images that were
originally captured by the Georgis in black and white were also
photographed in color, making it possible to have many of the same
images appear in this edition as they were originally viewed. At the
same time, not every single image was available in color, and some
would not benefit much by a color presentation. The various images
that were captured using differential interference contrast, especially
the unstained nematodes, appear basically gray under the microscope
and remain just as crisp in a black and white format as they would in
color. Also, some of the black and white images have been retained
because they are historical and represent prior work that was done at a
time when black and white art was the major form of presenting
illustrations in publications, as in the images originally collected by Dr.
John H. Whitlock and images that were published elsewhere in black
and white. In some cases, color images were not available for every
single parasite in a plate, and in those cases the black and white plates
were maintained, giving us something to strive for in the next edition.
The American Association of Veterinary Parasitologists (AAVP) has
worked hard, through the donated time of Drs. Anne M. Zajac of
Virginia Tech and Gary A. Conboy of the University of Prince Edward
Island, to generate a color edition of Veterinary Clinical Parasitology.
This is a great book, and I consider it an excellent ancillary text for
anyone routinely working on parasite diagnosis. The funds generated by
their text support the continued efforts of the AAVP, and I strongly
support use of the text.
I have had a good deal of help in preparing this edition. Dr. Hanni
Lee, now in a residency in Comparative Medicine, University of
Missouri-Columbia, helped with preparing many of the color images of
arthropods, protozoa, and platyhelminths for the text, and her help is
greatly appreciated. Dr. Danielle Armato, now practicing veterinary
medicine in Manhattan, assisted with a rewrite of the section regarding
annotated parasite lists in the chapter on diagnostics to make them
more informative. Dr. Araceli Lucio-Forster, with me here at Cornell,
through her work in diagnostic instruction of third-and fourth-year
veterinary students helped find many of the additional parasites, eggs,
and cysts that have been added new in color format. Overall, this has
been labor intensive, but great fun. Drs. Lee, Armato, and Lucio-Forster
have worked hard to help give the new edition its new look.
I have tried to update the text while also keeping basically the same
structure of the older editions. Because of the current interest in vector-
transmitted disease, I asked Dr. Susan E. Little, who holds the endowed
Krull-Ewing Chair in Veterinary Parasitology at Oklahoma State
University, to add a chapter on these diseases for this edition. We
parasitologists never could figure out the best way to fit into a text the
various microbes that do not usually fall under the umbrella of animal
parasitology but yet are pathogens that we believe need to be discussed.
I think readers will find the chapter very helpful.
In his chapter and throughout the text, Dr. Randy C. Lynn, of IDEXX
Pharmaceuticals, worked to update information on all the antiparasitics
currently in use. We have also worked to upgrade the tables of
antiparasitics in the major hosts; however, it is almost impossible to
keep the list up to date—an indication of how great an effort is
expended by our industrial colleagues to continuously supply better
products for parasite control and treatment. To Dr. Lynn’s chapter on
antiparasitics has also been added a table by Dr. Marshall W.
Lightowlers, associate professor in the Faculty of Veterinary Science of
the University of Melbourne, on vaccines against parasites. Not all of
these vaccines may be available in the United States, but they are out
there, have been used in some regions for years, and still show great
promise in some areas for parasite control. It seemed time to try and
summarize them for practitioners.
Dr. Mark L. Eberhard, of the Division of Parasitic Diseases, Centers for
Disease Control and Prevention, has reworked the chapter on parasites
in tissue sections. This chapter could be a book in its own right, but as
it is serves as a very good introduction to how to identify the parasites
that pathologists see. It is hoped that the color images help in
presentation of this material.
Dr. Hanna M. Roisman, of the Classics Department of Colby College,
has helped me again with the various derivations of many of the
parasitology terms that appear on the front and back inside covers of
the text. She also provided assistance as I worked through the
terminology that appears in Chapter 1 in which I attempt to define
zoonosis as it relates to disease transmission among animals.
Veterinarians need to remain highly active in this field, because many