Which one of the following hapatitis viruses have significant perinetal transmission ?
## **Core Concept**
The question tests knowledge of hepatitis viruses and their primary modes of transmission, specifically focusing on perinatal transmission. Hepatitis viruses are classified into several types: A, B, C, D, and E. Each type has a different primary mode of transmission. Perinatal transmission refers to the transmission of a pathogen from mother to child during the birth process.
## **Why the Correct Answer is Right**
The correct answer, ** Hepatitis B**, is known for its significant perinatal transmission. Hepatitis B virus (HBV) can be transmitted from an infected mother to her newborn during delivery. This mode of transmission is a major route for the spread of HBV, especially in endemic areas. The virus can also be transmitted through exposure to infected blood and other bodily fluids. The risk of perinatal transmission of HBV is significantly reduced by administering hepatitis B immune globulin and the first dose of hepatitis B vaccine to the newborn within 12 hours of life.
## **Why Each Wrong Option is Incorrect**
- **Option A (Hepatitis A):** Hepatitis A virus (HAV) primarily spreads through the fecal-oral route, often through contaminated food or water or close contact with an infected person. Perinatal transmission is not a significant mode of transmission for HAV.
- **Option C (Hepatitis C):** While hepatitis C virus (HCV) can be transmitted through exposure to infected blood, perinatal transmission does occur but at a lower rate compared to HBV, approximately 5%. However, it's not as significant as HBV in this context.
- **Option D (Hepatitis E):** Hepatitis E virus (HEV) is also primarily transmitted through the fecal-oral route, similar to HAV, and is not commonly associated with perinatal transmission.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that hepatitis B vaccination at birth is crucial for preventing perinatal transmission of HBV. This practice is widely adopted and has significantly reduced the incidence of HBV infections in many countries.
## **Correct Answer:** B. Hepatitis B.