What are the main types of viral hepatitis?

Hepatitis is an inflammation of the liver, which can lead to liver damage and affect its vital functions. Viral hepatitis is the most common type and is caused by several different viruses. Understanding these types, how they spread, and their symptoms is crucial for prevention and early diagnosis.

The main types of viral hepatitis are classified based on the virus that causes them. In the United States, the most common types are hepatitis A, B, and C [1]. Some types of viral hepatitis can be acute (short-term), while others can cause chronic (long-term) infection [1].

Hepatitis A (HAV)

This is caused by the hepatitis A virus (HAV) [2]. This type typically spreads through contact with food or water contaminated by the stool of an infected person [1]. It can also spread through close personal contact [2]. Hepatitis A usually causes a mild, short-term illness, and vaccination is the best method of prevention [2].

Hepatitis B (HBV)

This is caused by the hepatitis B virus (HBV) [2]. This virus spreads through contact with the blood or other body fluids of an infected person, such as sharing needles or unprotected sexual contact [1]. It can lead to acute or chronic infection [2]. An effective vaccine is available to prevent hepatitis B [1].

Hepatitis C (HCV)

This is caused by the hepatitis C virus (HCV) [2]. It is primarily transmitted through contact with the blood of an infected person [1]. Many people with hepatitis C do not show symptoms and may not realize they are infected [2]. If left untreated, it can lead to serious liver problems, such as damage, cirrhosis, or liver cancer [2]. There is no vaccine for hepatitis C, but it can be treated with oral medications [2].

Hepatitis D (HDV) and Hepatitis E (HEV)

Hepatitis D is caused by the hepatitis D virus and also spreads through contact with the blood and other body fluids of an infected person [1]. Hepatitis D infection can only occur in the presence of the hepatitis B virus [1].

Hepatitis E is caused by the hepatitis E virus and typically spreads through contact with food or water contaminated by the stool of an infected person [1]. It can also be contracted by consuming undercooked pork, venison, or shellfish [1].

Symptoms, Diagnosis, and Prevention

Some people with hepatitis may not show symptoms and may not be aware of their infection [1]. If symptoms appear, they may include fever, fatigue, loss of appetite, nausea and vomiting, abdominal pain, dark urine, light-colored stool, joint pain, and jaundice (yellowing of the skin and eyes) [1]. Symptoms of acute infection can begin anywhere from two weeks to six months after exposure, while symptoms of chronic infection may not appear for many years [1].

To diagnose hepatitis, a doctor will inquire about symptoms and medical history, conduct a physical examination, and order blood tests, including tests for viral hepatitis [1]. Additional tests may include imaging scans like an ultrasound, CT scan, or MRI, and a liver biopsy may be required for an accurate diagnosis and to assess damage [1].

To prevent viral hepatitis, vaccination against hepatitis A and B is recommended [2]. To prevent hepatitis C, one should avoid behaviors that can spread the disease, such as sharing needles or personal items that might come into contact with infected blood [2]. Early diagnosis and treatment of chronic hepatitis can prevent serious complications such as cirrhosis, liver failure, and liver cancer [1]. If you have symptoms suggesting hepatitis, it is important to consult a doctor to evaluate your condition and determine the next steps.

For more information on the types of hepatitis, symptoms, and prevention, you can visit Hepatitis: Types, Symptoms, and Prevention of Infection and Complications (Arabic).

Medical references

• Hepatitis
• Viral Hepatitis Basics