Which of the following hepatitis viruses have significant perinatal transmission?
**Core Concept**
Hepatitis viruses can be transmitted vertically from mother to child during pregnancy or at birth. Perinatal transmission is an important consideration for hepatitis viruses with high viral loads and maternal immune suppression.
**Why the Correct Answer is Right**
Hepatitis B virus (HBV) is known to have significant perinatal transmission due to its high viral load and ability to infect the fetus during delivery. The virus can be transmitted through contact with infected maternal blood or bodily fluids during birth. This is because HBV can infect the fetus during the third trimester of pregnancy, and the virus can also be transmitted through breast milk. The risk of perinatal transmission can be significantly reduced with antiviral prophylaxis and hepatitis B immune globulin (HBIG) administration to the newborn.
**Why Each Wrong Option is Incorrect**
**Option A:** Hepatitis A virus (HAV) is primarily transmitted through the fecal-oral route and is not typically associated with perinatal transmission.
**Option B:** Hepatitis C virus (HCV) can be transmitted vertically, but the risk is significantly lower compared to HBV.
**Option D:** Hepatitis E virus (HEV) is also primarily transmitted through the fecal-oral route and is not typically associated with perinatal transmission.
**Clinical Pearl / High-Yield Fact**
HBV perinatal transmission can be prevented with timely antiviral prophylaxis and HBIG administration. This highlights the importance of screening pregnant women for HBV and providing prompt treatment to prevent vertical transmission.
**Correct Answer: B. Hepatitis B virus (HBV)**