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    West Nile Virus
    West Nile Virus
    West Nile Virus
    Ebook165 pages1 hour

    West Nile Virus

    By Melissa Abramovitz

    ()

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    About this ebook

    As new cases of West Nile Virus begin to appear across the United States, this book offers a timely discussion of this potentially devastating disease. Author Melissa Abramovitz outlines the mechanics of virus transmission and how mosquitoes and disease-carrying birds have played a key role in the West Nile Virus epidemic. This book covers basic information about the virus and its possible effects, as well as a discussion of personal and governmental prevention plans. The last chapter focuses on treatments currently in development.
    LanguageEnglish
    PublisherRosen Publishing
    Release dateJan 7, 2013
    ISBN9781420510973
    West Nile Virus
    Author

    Melissa Abramovitz

    Melissa Abramovitz lives in Roseville, California, and writes nonfiction books for all age groups. She is the author of hundreds of magazine articles, more than 40 educational books for children and teenagers, numerous poems and short stories, and several children’s picture books. She has a degree in psychology from the University of California San Diego and is a graduate of the Institute of Children’s Literature. Visit her online at www.melissaabramovitz.com.

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      Book preview

      West Nile Virus - Melissa Abramovitz

      © 2013 Gale, Cengage Learning

      ALL RIGHTS RESERVED. No part of this work covered by the copyright herein may be reproduced, transmitted, stored, or used in any form or by any means graphic, electronic, or mechanical, including but not limited to photocopying, recording, scanning, digitizing, taping, Web distribution, information networks, or information storage and retrieval systems, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act, without the prior written permission of the publisher.

      Every effort has been made to trace the owners of copyrighted material.

      LIBRARY OF CONGRESS CATALOGING-IN-PUBLICATION DATA

      Abramovitz, Melissa, 1954-West Nile virus / by Melissa Abramovitz.

      p. cm. -- (Diseases & disorders)

      Includes bibliographical references and index.

      ISBN 978-1-4205-0936-6 (hardcover)

      1. West Nile fever--Juvenile literature. 2. West Nile virus--Juvenile literature. I. Title.

      RA644.W47A25 2013 614.5’8856--dc23

      2012034405

      Lucent Books

      27500 Drake Rd. 

      Farmington Hills, MI 48331

      ISBN-13: 978-1-4205-0936-6

      ISBN-10: 1-4205-0936-5

      Printed in the United States of America 1 2 3 4 5 6 7 16 15 14 13 12

      Table of Contents

      Foreword

      Introduction

      A Spreading Invasion

      Chapter 1

      What Is West Nile Virus?

      Chapter 2

      How West Nile Virus Is Spread

      Chapter 3

      Treatment for and Living with West Nile Virus

      Chapter 4

      Prevention and Control

      Chapter 5

      The Future

      Notes

      Glossary

      Organizations to Contact

      For More Information

      Index

      Picture Credits

      About the Author

      FOREWORD

      The Most Difficult Puzzles Ever Devised

      Charles Best, one of the pioneers in the search for a cure for diabetes, once explained what it is about medical research that intrigued him so. It’s not just the gratification of knowing one is helping people, he confided, although that probably is a more heroic and selfless motivation. Those feelings may enter in, but truly, what I find best is the feeling of going toe to toe with nature, of trying to solve the most difficult puzzles ever devised. The answers are there somewhere, those keys that will solve the puzzle and make the patient well. But how will those keys be found?

      Since the dawn of civilization, nothing has so puzzled people— and often frightened them, as well—as the onset of illness in a body or mind that had seemed healthy before. A seizure, the inability of a heart to pump, the sudden deterioration of muscle tone in a small child—being unable to reverse such conditions or even to understand why they occur was unspeakably frustrating to healers. Even before there were names for such conditions, even before they were understood at all, each was a reminder of how complex the human body was, and how vulnerable.

      While our grappling with understanding diseases has been frustrating at times, it has also provided some of humankind’s most heroic accomplishments. Alexander Fleming’s accidental discovery in 1928 of a mold that could be turned into penicillin has resulted in the saving of untold millions of lives. The isolation of the enzyme insulin has reversed what was once a death sentence for anyone with diabetes. There have been great strides in combating conditions for which there is not yet a cure, too. Medicines can help AIDS patients live longer, diagnostic tools such as mammography and ultrasounds can help doctors find tumors while they are treatable, and laser surgery techniques have made the most intricate, minute operations routine.

      This toe-to-toe competition with diseases and disorders is even more remarkable when seen in a historical continuum. An astonishing amount of progress has been made in a very short time. Just two hundred years ago, the existence of germs as a cause of some diseases was unknown. In fact, it was less than 150 years ago that a British surgeon named Joseph Lister had difficulty persuading his fellow doctors that washing their hands before delivering a baby might increase the chances of a healthy delivery (especially if they had just attended to a diseased patient)!

      Each book in Lucent’s Diseases and Disorders series explores a disease or disorder and the knowledge that has been accumulated (or discarded) by doctors through the years. Each book also examines the tools used for pinpointing a diagnosis, as well as the various means that are used to treat or cure a disease. Finally, new ideas are presented—techniques or medicines that may be on the horizon.

      Frustration and disappointment are still part of medicine, for not every disease or condition can be cured or prevented. But the limitations of knowledge are being pushed outward constantly; the most difficult puzzles ever devised are finding challengers every day.

      INTRODUCTION

      A Spreading Invasion

      In August 1999 eight people in New York City developed an unusual type of encephalitis (brain inflammation). The patients ranged in age from fifty-eight to eighty-seven. All were previously fairly healthy, and all had fever followed by changes in mental function, which is typical in encephalitis. But seven of the eight also had severe muscle weakness, which is unusual in encephalitis, and three had Guillain-Barre-like symptoms, which are also atypical. Guillain-Barre syndrome is characterized by sudden weakness or paralysis in the arms, legs, face, and muscles that control breathing. Four patients went on to develop paralysis so severe that they could not breathe on their own and had to be placed on mechanical ventilators.

      Investigating the Mystery

      The patients’ doctors alerted the New York City Department of Health, and epidemiologists (doctors who specialize in tracking down the causes and spread of mysterious or infectious diseases) began trying to determine what was causing these strange varieties of encephalitis. The first step involved analyzing what the patients had in common. Blood tests and tests on the cerebrospinal fluid, which surrounds the brain and spinal cord, revealed that all the patients had an unidentified viral infection. Investigators also discovered that all the patients lived within a 16-square-mile area (41.4 sq. km) in the Queens section of New York City, and all reported that they had been outdoors on recent evenings. This suggested that mosquitoes, which carry many viruses and are most active in the early evening, may have transmitted whichever virus was causing the illness.

      Scientists analyzed standing water near each of the patients’ homes and discovered culex mosquito larvae. As more reports of other people with similar symptoms came into the health department, further data revealed that all the patients had recently been near mosquito breeding sites. During the remainder of 1999, a total of sixty-two people in New York City were affected by the mysterious illness, and seven died.

      Physicians began testing patients’ blood and cerebrospinal fluid for viruses commonly spread by mosquitoes. They found that all had antibodies to Saint Louis encephalitis virus, the most common mosquito-borne virus in the United States. Antibodies are chemicals produced by the immune system to attack specific antigens (foreign proteins or organisms such as viruses). The presence of these antibodies suggested that Saint Louis encephalitis virus was probably the cause of the patients’ symptoms.

      Further Clues

      The mystery, however, had

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