What are the types of viral hepatitis?

Written by Xiong Hong Hai
Infectious Disease
Updated on March 25, 2025
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Common types of viral hepatitis include Hepatitis A, Hepatitis B, Hepatitis C, Hepatitis D, and Hepatitis E, as well as Hepatitis G. Infections by the Epstein-Barr virus and cytomegalovirus can also potentially cause liver damage. Of course, there are other related viral infections that can lead to liver damage and can be classified as viral hepatitis. Different types of viral hepatitis have different transmission routes and methods, and their prognosis and outcomes vary. Appropriate measures should be taken based on the specific circumstances.

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Is viral hepatitis transmitted through saliva?

Regarding the question of whether viral hepatitis can be transmitted through saliva, it depends on the actual situation. Some types of viral hepatitis that are transmitted through the fecal-oral route in the digestive tract might also be transmitted through saliva, such as Hepatitis A and Hepatitis E, which are acute viral hepatitis transmitted through the fecal-oral route. Generally, saliva is considered contagious in these cases. However, for Hepatitis B, Hepatitis C, and Hepatitis D, these types of viral hepatitis are not generally transmitted through the digestive tract, and therefore, saliva is not considered contagious.

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What are the hazards of viral hepatitis?

Viral hepatitis can be categorized based on its cause into hepatitis A, B, C, E, and D. For hepatitis A and E, it is generally acute and usually has a good prognosis without severe consequences. However, hepatitis B and C often lead to chronic hepatitis, progressing into chronic viral hepatitis, then to cirrhosis and even liver cancer, which can affect quality of life and lifespan.

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Written by Xiong Hong Hai
Infectious Disease
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Symptoms of viral hepatitis

The clinical symptoms of viral hepatitis are mainly related to liver function. Generally, there are no obvious symptoms when liver function is normal or mildly abnormal. However, when liver function becomes significantly abnormal, symptoms such as fatigue, aversion to oil, nausea, abdominal distension, and poor appetite may occur. Different types of viral hepatitis have different prognoses and severity of illness. Treatment should be tailored to the actual situation, including liver protection, enzyme reduction, and addressing the cause through comprehensive treatment.

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Typing of Viral Hepatitis

Viral hepatitis mainly includes Hepatitis A, B, C, D, E, etc., among which Hepatitis A and E are acute infections. Generally, there is no long-term damage to the human body after infection; recovery of liver function suffices. Hepatitis B and C infections are prone to becoming chronic, leading to chronic hepatitis B and chronic hepatitis C, respectively. These chronic infections can easily lead to cirrhosis and liver cancer. Among them, the carrier rate of HBsAg in hepatitis B is about 7%, and there are approximately 9.6 million people with hepatitis C in China. Therefore, the incidence rates of hepatitis B and C are relatively high, and if there are abnormalities in liver function, it is crucial to check for these diseases.

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Infectious Disease
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Treatment of viral hepatitis

Once viral hepatitis occurs, the liver function is obviously abnormal. Patients may have significant discomfort symptoms such as fatigue, poor appetite, nausea, vomiting, and bloating after eating. Therefore, the treatment of patients with viral hepatitis mainly consists of two aspects. The first aspect is bed rest combined with a light, low-fat diet. The second aspect is pharmacological treatment. For patients with significantly abnormal liver function, medications that protect the liver and reduce enzyme levels are needed. If significant jaundice occurs, medications to reduce jaundice are required. Additionally, if the viral hepatitis is caused by hepatitis B or C, antiviral medications might be necessary. Only through active antiviral treatment can the damage to the liver by the virus be reduced, and thus better recovery of the patients can be achieved.