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13 - Viral Hepatitis

from Part I - Systems

Published online by Cambridge University Press:  15 December 2009

Ramin Jamshidi
Affiliation:
Adjunct Professor of Physics University of San Francisco, University of California, San Francisco School of Medicine, San Francisco, CA
Francis Yao
Affiliation:
Professor of Clinical Medicine and Surgery, Associate Medical Director, Liver Transplantation University of California, San Francisco School of Medicine, San Francisco, CA
Rachel L. Chin
Affiliation:
University of California, San Francisco
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Summary

INTRODUCTION

A number of viruses have been found to primarily infect hepatocytes, though not all cause clinically relevant disease. The classically recognized hepatotropic viruses are the hepatitis A, B, C, D, E, and G viruses. Of clinically apparent acute and chronic hepatitis, 10% to 20% is cryptogenic in nature and is thought to be caused by as yet unidentified viruses.

EPIDEMIOLOGY

Hepatitis viruses A and E are transmitted via the fecal-oral route, whereas B, C, and D are spread primarily via contact with infected blood or other body fluid. Hepatitis G is transferred by either route, but is not proven to cause clinical disease. Fecal-oral transmission of the A and E viruses is responsible for most acute outbreaks, whereas B and C constitute a major chronic public health burden.

Hepatitis A virus (HAV) infection accounts for approximately 25,000 cases of acute hepatitis annually in the United States, with as many as 40% of the urban population having serologic evidence of past infection. Outbreaks often affect clusters of persons exposed to a single source, such as a food handler or contaminated central water supply.

Persons infected with hepatitis B virus (HBV) carry the virus in all bodily fluids (blood, breast milk, saliva, semen, and urine). HBV can cause both acute and chronic hepatitis, the latter conferring risk of cirrhosis and hepatocellular carcinoma. It is estimated that 200 million people worldwide are chronically infected with HBV.

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Publisher: Cambridge University Press
Print publication year: 2008

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References

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  • Viral Hepatitis
    • By Ramin Jamshidi, Adjunct Professor of Physics University of San Francisco, University of California, San Francisco School of Medicine, San Francisco, CA, Francis Yao, Professor of Clinical Medicine and Surgery, Associate Medical Director, Liver Transplantation University of California, San Francisco School of Medicine, San Francisco, CA
  • Edited by Rachel L. Chin, University of California, San Francisco
  • Book: Emergency Management of Infectious Diseases
  • Online publication: 15 December 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511547454.014
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  • Viral Hepatitis
    • By Ramin Jamshidi, Adjunct Professor of Physics University of San Francisco, University of California, San Francisco School of Medicine, San Francisco, CA, Francis Yao, Professor of Clinical Medicine and Surgery, Associate Medical Director, Liver Transplantation University of California, San Francisco School of Medicine, San Francisco, CA
  • Edited by Rachel L. Chin, University of California, San Francisco
  • Book: Emergency Management of Infectious Diseases
  • Online publication: 15 December 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511547454.014
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Viral Hepatitis
    • By Ramin Jamshidi, Adjunct Professor of Physics University of San Francisco, University of California, San Francisco School of Medicine, San Francisco, CA, Francis Yao, Professor of Clinical Medicine and Surgery, Associate Medical Director, Liver Transplantation University of California, San Francisco School of Medicine, San Francisco, CA
  • Edited by Rachel L. Chin, University of California, San Francisco
  • Book: Emergency Management of Infectious Diseases
  • Online publication: 15 December 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511547454.014
Available formats
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