Evolving epidemiology of hepatitis C virus in the United States

R Monina Klevens1, Dale J Hu, Ruth Jiles

  • 1Division of Viral Hepatitis, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, 1600 Clifton Road NE, Atlanta, GA 30333, USA.

Insights

Hepatitis C virus (HCV) infection causes more U.S. deaths than HIV/AIDS, with rising trends in young adults and new transmission routes. Understanding infection origins is key for diagnosis and treatment by physicians.

Area of Science:

  • Infectious Diseases
  • Hepatology
  • Public Health Epidemiology

Background:

  • Hepatitis C virus (HCV) infection poses a significant health burden in the United States.
  • Despite a decline in incidence, chronic HCV affects millions, causing more disease and death than HIV/AIDS.
  • Emerging trends necessitate updated strategies for managing HCV.

Purpose of the Study:

  • To highlight the evolving epidemiology of Hepatitis C virus infection in the U.S.
  • To inform infectious disease physicians about current trends and patient populations at risk.
  • To emphasize the importance of understanding infection pathways for effective screening and treatment.

Main Methods:

  • Review of current epidemiological trends in HCV infection.
  • Analysis of changing demographics and transmission routes.
  • Assessment of the impact of HCV compared to other infectious diseases.

Main Results:

  • Chronic HCV infection is a leading cause of disease and mortality in the U.S., surpassing HIV/AIDS.
  • Increasing HCV incidence is observed among young, suburban populations, often linked to prescription opioid use and subsequent heroin injection.
  • New transmission pathways include nonhospital healthcare settings and sexual transmission among HIV-infected individuals.

Conclusions:

  • Infectious disease physicians face growing responsibility for diagnosing and treating HCV.
  • Understanding the origins of HCV infection is crucial for targeted screening and effective patient management.
  • Public health initiatives must adapt to address the changing landscape of Hepatitis C virus transmission.

Related Concept Videos

Hepatitis01:25

Hepatitis

Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
Viral Hepatitis I: Introduction01:28

Viral Hepatitis I: Introduction

Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...
Hepatic Drug Excretion: Influencing Factors01:16

Hepatic Drug Excretion: Influencing Factors

The biliary system of the liver, crucial for bile secretion and drug excretion, comprises intrahepatic bile ducts that merge to form the common hepatic duct. This duct, carrying hepatic bile, combines with the cystic duct, draining the gallbladder and forming the common bile duct, which empties into the duodenum. Bile, produced by hepatic cells lining the bile canaliculi, is composed primarily of water, bile salts, pigments, electrolytes, and lesser amounts of cholesterol and fatty acids. Bile...
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess the...
Viral Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Diseases of the Liver and Gallbladder01:26

Diseases of the Liver and Gallbladder

Liver and gallbladder diseases are a significant health concern, with prominent conditions including cirrhosis, hepatitis, non-alcoholic fatty liver disease (NAFLD), and gallstones. Jaundice is a common manifestation of liver and biliary disease.
Cirrhosis is characterized by the scarring of hepatic lobules in the liver, which are replaced by fibrous tissue, affecting the liver's normal functioning. NAFLD, on the other hand, is caused by an excessive build-up of fat in the liver, not related to...