What is hepatitis C?
Hepatitis C virus (HCV), the most common blood-borne infection in the United States, is widely regarded as a “silent killer.” Although it can be detected in the blood in as little as 1–3 weeks after exposure, patients may not display any symptoms of this deadly disease for years, even decades. According to the Centers for Disease Control and Prevention (CDC), chronic HCV infection develops in 70–85% of infected persons, 60–70% of whom display evidence of liver disease.
The following statistics reflect the high prevalence of HCV in the US and around the world:
- Approximately 4 million persons in the U.S. are chronically infected with hepatitis C.
- Globally, up to 3% of the population may be infected with HCV (including those undiagnosed).
- For every 100 persons infected with HCV, 1–5 will die from it, in the form of liver cancer or cirrhosis of the liver.
While hepatitis C can be life-threatening, statistics show that the number of acute, symptomatic cases has declined sharply in the US over the past 20 years, from >3 cases per 100,000 people in 1992 to <0.5 per 100,000 in 2008. Moreover, the disease is far less prevalent in men than it used to be. In the early 1990s, infected males outnumbered infected females by a 3:1 ratio, but by 2008 the rate had narrowed to almost 1:1, with the overall incidence of HCV leveling off among both sexes.
What are the symptoms of hepatitis C?
According to the CDC, roughly 20–30% of newly infected patients will experience fatigue, abdominal pain, poor appetite, or jaundice. Generally, symptoms occur within 4–12 weeks after exposure to the virus. While chronic liver disease in HCV-infected patients progresses slowly, other symptoms that should trigger further investigation include joint pain, fever, dark urine, clay-colored stools, nausea, and vomiting. Again, with any type of “silent” disease, symptoms may be mild and less likely to prompt a visit to a doctor.
What causes hepatitis C?
Hepatitis C virus is transmitted through contact with infectious blood, usually by persons who have injected drugs, even if it was only once many years ago. HCV can also be contracted through donated blood, blood products, and donated organs (although this is much rarer these days due to better screening procedures); needle-stick injuries in health care settings; and mother-to-child transmission in cases in which the pregnant mother is infected with HCV.
Hepatitis C virus can also be spread through other, less frequent, ways, such as by having unprotected sex with an HCV-infected person or sharing personal items that may be contaminated with infectious blood—toothbrushes, razors, and tools for tattooing or body piercing, for example. Some invasive medical procedures may also be at fault, although this is rare. Contrary to popular belief, breastfeeding, sneezing/coughing, and hugging do not transmit the virus, nor is it spread through food and water.