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What are the transmission routes of hepatitis B?

May 22, 2022 Source: Cainiu Health
Dr. Jiang Weimin
Introduction
Hepatitis B virus (HBV) can be transmitted through various routes, including mother-to-child transmission and bloodborne transmission. Transmission via the placenta, sperm, or ova may occur when maternal blood crosses the placental barrier into the fetal circulation; it may also occur through the infant’s damaged skin or mucous membranes—such as via oral exposure to maternal blood. Additionally, HBV can infect the fetus through maternal breast milk, saliva, and other bodily fluids. Pregnant women should undergo appropriate screening tests to safeguard both their own health and that of the fetus.

Hepatitis B is a common disease encountered in daily life and is contagious to a certain extent. Many people harbor reservations or misconceptions about individuals with hepatitis B. Prompt treatment is essential, as this disease spreads rapidly; both patients and susceptible individuals must exercise heightened vigilance. So, what are the transmission routes of hepatitis B?

What Are the Transmission Routes of Hepatitis B?

Hepatitis B can be transmitted via mother-to-child transmission and bloodborne transmission, among others. During pregnancy, the virus may cross the placenta from maternal blood into the fetal circulation. It may also enter the newborn’s body through damaged skin or mucous membranes—such as during oral exposure to maternal blood. Additionally, the virus can infect the fetus via breast milk, saliva, and other bodily fluids. Pregnant women should undergo appropriate screening tests to safeguard both their own health and that of their unborn child. Transmission may also occur through blood transfusions or blood products—even minute quantities of hepatitis B virus (HBV)-contaminated blood can cause infection. Furthermore, using medical instruments contaminated with HBV can lead to infection, clinically termed “iatrogenic transmission.”

Sexual transmission of HBV occurs through intimate contact involving infectious bodily fluids—including saliva, breast milk, semen, and vaginal secretions. Kissing or engaging in sexual intercourse with an individual infected with hepatitis B carries a risk of transmission and warrants caution. In clinical settings, reuse of inadequately sterilized medical instruments—or use of instruments previously contaminated with HBV—can likewise result in infection.

Preventing hepatitis B in everyday life demands consistent attention. Avoid sharing personal items such as razors or toothbrushes with individuals who have hepatitis B. Practice preventive measures diligently—especially by avoiding skin injuries or bleeding that could facilitate infection. We hope this article has been helpful. Wishing you a joyful life and optimal health!

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