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Georgis' Parasitology for Veterinarians - E-Book


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Georgis’ Parasitology for Veterinarians, 10th Edition provides current information on all parasites commonly encountered in veterinary medicine. Its primary focus is on parasites that infect major domestic species, such as dogs, cats, horses, pigs, and ruminants, but it also includes coverage of organisms that infect poultry, laboratory animals, and exotic species. This edition features chapters that cover arthropods, protozoans, and helminths, including their taxonomy and life cycles, as well as the clinical signs, diagnosis, and treatment of each parasite’s infection or infestation. Other chapters include vector-borne diseases, antiparasitic drugs, diagnostic parasitology, histopathologic diagnosis, and a new chapter on vaccinations. No other book on this topic is so well-respected and so thorough. It’s the only parasitology reference that provides all the information you’ll need!

  • The most comprehensive parasitology book on the market, written specifically for veterinarians, provides complete information on all parasites commonly encountered in veterinary medicine, as well as information about minor or rare parasites.
  • High-quality color photographs and illustrations make the process of identifying and treating parasites more accurate and efficient.
  • Updated drug tables offer the most current information on drugs, vaccinations, and parasticides.
  • Greek and Latin roots printed alphabetically on the inside front and back covers provide you with quick access to scientific names and terms.
  • NEW! New chapter covering the use and development of vaccines against parasites keeps you up to date with what’s currently happening in this area.
  • NEW! Expanded chapter on vector-borne diseases provides more in-depth detail on this topic and places more focus on bacterial parasites.
  • NEW! New diagrams illustrating the mode of action of the different classes of antiparasitics make the antiparasitic drug chapter more understandable.
  • NEW! Updated protozoa chapter includes newer taxonomy to ensure you have the latest information on this subject.
  • NEW! A new table in the arthropod chapter covering diseases transmitted by different ticks provides up-to-date information about these parasites.



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Published 12 March 2014
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EAN13 9781455739882
Language English
Document size 36 MB

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Georgis' Parasitology for Veterinarians
Dwight D. Bowman, MS, PhD Professor of Parasitologd, Department of Microbiologd an Immunologd, College of Veterinard Meicine, Cornell Universitd, Ithaca, New York
Table of Contents
Cover image
Title page
Chapter 1: Introduction Common Terms in Parasitology Conventions of Taxonomic Classification Identification and Diagnosis Relationship between Parasites and Hosts
Chapter 2: Arthropods Class Insecta Class Arachnida Class Crustacea
Chapter 3: Protista Excavata SAR Unikonts
Chapter 4: Helminths
Phylum Platyhelminthes
Phylum Nematoda
Adenophorean Nematodes
Miscellaneous Worms
Chapter 5: Vector-Borne Diseases Viral Pathogens Transmitted by Arthropods Rickettsial Pathogens Transmitted by Vectors
Other Bacterial Pathogens Transmitted by Vectors
Vector-Borne Protozoa
Vector-Borne Helminths
Chapter 6: Antiparasitic Drugs Development Insecticides
Resistance Summary
Chapter 7: Diagnostic Parasitology Fecal Examination General Identification of Eggs, Cysts, and Larvae
Skin Scrapings for Mange Diagnosis
Necropsy Procedures
Parasites of Dogs
Parasites of Cats
Parasites of Ruminants
Parasites of Horses
Parasites of Swine
Parasites of Laboratory Rabbits and Rodents
Parasites of Monkeys and Apes
Chapter 8: Histopathologic Diagnosis Arthropods Protozoa Helminths
Chapter 9: Vaccinations Protozoal Infections Helminth Infections
Arthropod Parasites
Future Prospects
Derivations of Some Scientific Names and Terms
3251 Riverport Lane St. Louis, Missouri 63043 GEORGIS' PARASITOLOGY FOR VETERINARIANS ISBN: 978-1-4557-4006-2 Copyright © 2014, 2009, 2003, 1999, 1995, 1990, 1985, 1980, 1974, 1969 by Saunders, an imprint of Elsevier Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permissions may be sought directly from Elsevier's Health Sciences Rights Department in Philadelphia, PA, USA: phone: (+1) 215 239 3804, fax: (+1) 215 239 3805, e-mail:healthpermissions@elsevier.com. You may also complete your request on-line via the Elsevier homepage (http://www.elsevier.com), by selecting “Customer Support” and then “Obtaining Permissions.” 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 Editor assumes any liability for any injury and/or damage to persons or property arising out of or related to any use of the material contained in this book. The Publisher
ISBN: 978-1-4557-4006-2 Vice President and Publisher:Linda Duncan Content Strategy Director:Penny Rudolph Content Manager:Shelly Stringer Publishing Services Manager:Catherine Jackson Senior Project Manager:David Stein Design Direction:Jessica Williams
Printed in China Last digit is the print number: 9 8 7 6 5 4 3 2 1
Tad B. Coles, DVM Medical Writing Veterinary Consulting Overland Park, Kansas Antiparasitic Drugs Mark L. Eberhard, PhD Division of Parasitic Diseases and Malaria Centers for Disease Control and Prevention Atlanta, Georgia Histopathologic Diagnosis Marshall W. Lightowlers, BSc, Hons, PhD The University of Melbourne Veterinary Hospital Werribee, Victoria, Australia Vaccinations Randy C. Lynn, DVM, MS, DACVCP Manager, Technical Services Companion Animal Business Unit Merck Animal Health Summit, New Jersey Antiparasitic Drugs Susan E. Little, DVM, PhD, DACVM Regents Professor and Endowed Chair Department of Veterinary Pathobiology Center for Veterinary Health Sciences Oklahoma State University Stillwater, Oklahoma Vector-Borne Diseases
I n this, the tenth edition ofGeorgis' Parasitology for Veterinarians, besides the usual updating of details in the text, there have been some significant changes. These changes include altering the order of material presented in the chapter on arthropods, major organizational revisions in the chapter on the protista (protozoa) to match what appears to be the new “systematic synthesis,” an a#empt to add more images and more reader-friendly text to the chapter on diagnostic parasitology, and finally the expansion of the table on antiparasite vaccines by D r. Marshall Lightowlers into a full chapter on veterinary vaccines to go along with the chapter on antiparasitic drugs. The book includes many new images, new tables, and updated information, with the hope that it will continue to serve veterinarians and students of veterinary parasitology well. A gain, as stated in the preface of the last edition, for those interested in veterinary parasitology and especially veterinary diagnostics,Veterinary Clinical Parasitology, eighth edition, by D r. A nne M. Zajac of the Virginia-Maryland Regional College of Veterinary Medicine in Blacksburg, Virginia and D r. Gary A . Conboy is a must-have addition to any library or collection. The book just keeps ge#ing be#er and be#er. A gain, the proceeds from the sale ofVeterinary Clinical Parasitology support the continuing efforts of the A merican A ssociation of Veterinary Parasitologists (A AVP) to provide a centralized vibrant forum for its membership that is also a welcoming presence for new members of the veterinary parasitology community. Positive things relative to veterinary education have happened since the last edition ofGeorgis' Parasitology for Veterinarians. The field of veterinary parasitology, through the hard work of many members of the A AVP, has become a recognized specialty within the A merican College of Veterinary Microbiologists, and the first new D iplomates have taken and passed the General and S pecialty Parasitology Examinations. The N ational Center for Veterinary Parasitology (N CVP) at O klahoma S tate is going strong as it provides a central nidus for the spread of educated parasitologists nationally. The educators in veterinary parasitology with fiscal assistance from A AVP and the Companion A nimal Parasite Council (CA PC) have met every other year for the past 6 years (in Atlanta, Georgia; N CVP in S tillwater, O klahoma; and the US D A -A RS facility in Beltsville, Maryland) to discuss parasitology education, to share teaching methods and information on curricula, and to define clinical competencies and the means for measuring their completion (Figure 1). Overall, education in veterinary parasitology remains vibrant and strong.
FIGURE 1Veterinary Educators at the third AAVP/CAPC Parasitology Educators Symposium at the Animal Parasitic Diseases Laboratory of the USDA's Agricultural Research Service (ARS) in Beltsville, Maryland.
A n issue of growing concern in veterinary parasitology involves the use of macrocyclic lactones. It is well accepted that there is significant resistance to this class of products in terms of the helminths of sheep and goats and relative toParascaris equorumn equine parasitology, the recent report byin horses. I etal (2012)N ielsen on the appearance of the eggs ofStrongylus vulgarisin the feces of horse herds eggs undergoing selective therapy for cyathostome control is worrisome. S elective therapy was put in place to prevent the potential development of cyathostome resistance, but the concern now is that this practice, which does not target the large strongyles, may be allowing an increase in cases of verminous arteritis fromS. vulgaris. Thus the practice needs to be reconsidered in light of this finding, and it probably argues strongly for improved methods or the easy diagnosis ofS. vulgaris infections. A lso, the specter of potential resistance of heartworms to macrocyclic lactones as used in heartworm preventives raised its head in a series of publications (S nyder etal, 2011a, 2011b;Blagburn etal, 2011,Bourguinat etal, 2011). The concern over heartworm resistance to macrocyclic lactones is fully warranted because canine heartworm infections can produce dreadful consequences. I t is critical that veterinary parasitologists work toward determining whether or not heartworm resistance exists and, if it does exist, how to prevent the spread of any resistant forms. This is an absolutely marvelous class of compounds for both livestock and companion animals, and stewardship by the veterinary parasitology community must be a continued goal.