Acute hepatitis C is inflammation of the liver that is caused by the hepatitis C virus and that lasts from a few weeks up to 6 months.
Hepatitis C is spread through contact with blood or other bodily fluids of infected people, as occurs when people share unsterilized needles to inject illicit drugs.
Acute hepatitis C often causes no symptoms.
Doctors diagnose acute hepatitis C based on blood tests.
No vaccine is available.
Acute hepatitis C is treated with the same antiviral medications used to treat chronic hepatitis C.
(See also Overview of Hepatitis, Overview of Acute Viral Hepatitis, and Hepatitis C, Chronic.)
In the United States, nearly 5,000 cases of acute hepatitis C were reported in 2023. However, because many cases are not recognized or not reported, the actual number of new infections was estimated to be over 69,000 in 2023. The number of people with acute hepatitis C in the United States has been relatively stable since 2021.
For unknown reasons, about 16% of people with alcohol-related liver disease have hepatitis C. In these people, alcohol and hepatitis C work together to worsen inflammation and scarring of the liver (cirrhosis).
Transmission of hepatitis C
Hepatitis C is usually spread through contact with blood of an infected person. Hepatitis C is most commonly transmitted among people who share unsterilized needles to inject illicit drugs. The infection can also be transmitted through unsterilized needles used for tattoos and body piercings.
Transmission through blood transfusions or organ transplants is possible but rare because of widespread screening of the blood supply for the hepatitis C virus.
Transmission through sexual contact is uncommon, as is transmission from an infected pregnant woman to her baby.
How someone gets hepatitis C cannot always be determined.
Symptoms of Acute Hepatitis C
At first, acute hepatitis C is usually mild and often causes no symptoms. Most people with acute hepatitis C are unaware that they are infected.
Some people with acute hepatitis C have typical symptoms of viral hepatitis. These symptoms include
Loss of appetite
A general feeling of illness (malaise)
Fever
Nausea and vomiting
Jaundice (yellowing of the skin and whites of the eyes)
Acute hepatitis C very rarely becomes severe (acute liver failure).
Hepatitis C becomes chronic in the majority of people. Chronic infection is usually mild. However, over time, up to 10% of people with chronic hepatitis C develop cirrhosis. Liver cancer may also develop after cirrhosis has developed.
Diagnosis of Acute Hepatitis C
Blood tests
Doctors suspect acute hepatitis C when:
People have symptoms of acute hepatitis.
Blood tests (liver tests) detect inflammation of the liver (hepatitis).
People have risk factors for getting hepatitis C.
Testing usually begins with blood tests to determine how well the liver is functioning and whether it is damaged (liver tests). Liver tests involve measuring the levels of liver enzymes and other substances produced by the liver.
If tests detect liver abnormalities, other blood tests are done to check for hepatitis virus infection. These blood tests can identify parts of specific viruses (antigens), specific antibodies produced by the body to fight the virus, and genetic material (RNA or DNA) of the virus.
For hepatitis C, the presence of antibodies to the hepatitis C virus suggests that people have been infected with hepatitis C at some time in their life but are not necessarily still infected. If antibodies to hepatitis C are found, the hepatitis C RNA test is done to determine whether the infection is current or occurred in the past. Having antibodies to hepatitis C does not protect people from getting hepatitis C. (In contrast, having antibodies to hepatitis A and hepatitis B does protect against future infection with these viruses.)
Blood tests are also done to look for other causes of hepatitis.
Treatment of Acute Hepatitis C
Antiviral medications
People with acute hepatitis C are treated with the same medications used to treat chronic hepatitis C as soon as acute hepatitis C is diagnosed. These medications may decrease the risk of acute hepatitis C becoming chronic.
People with hepatitis C should not drink alcohol because it can damage the liver further. There is no need to avoid certain foods or to limit activity. People should not take medications that can damage the liver, such as acetaminophen.
Prevention of Acute Hepatitis C
High-risk behavior, such as sharing needles to inject illicit drugs, should be avoided.
In the United States, all blood donors are tested for hepatitis C to prevent the spread of hepatitis C virus through transfusions. Also, even though the chance of getting hepatitis from transfusions is remote, doctors use transfusions only when there is no alternative. These measures have dramatically decreased the risk of getting hepatitis from a blood transfusion.
More Information
The following English-language resource may be useful. Please note that The Manual is not responsible for the content of this resource.
U.S. Centers for Disease Control and Prevention. Hepatitis C.
Drug Information for the Topic
