Japanese B encephalitis virus is transmitted by-
**Core Concept**
Japanese Encephalitis (JE) virus is a flavivirus transmitted to humans through the bite of an infected mosquito, primarily Culex species. This mosquito-borne transmission is a crucial aspect of JE epidemiology and prevention.
**Why the Correct Answer is Right**
The correct answer involves the understanding of the mosquito vector's role in transmitting the virus. Culex mosquitoes, particularly Culex tritaeniorhynchus, are the primary vectors of JE virus. When these mosquitoes feed on the blood of infected animals, such as pigs or birds, they become infected with the virus. Later, when they feed on human blood, they transmit the virus to the person. This cycle of transmission is essential for the spread of JE virus in endemic areas.
**Why Each Wrong Option is Incorrect**
**Option A:** Not applicable (no information provided).
**Option B:** Not applicable (no information provided).
**Option C:** Not applicable (no information provided).
**Option D:** Not applicable (no information provided), but this is a placeholder for a distractor.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the transmission of JE virus can be prevented through measures such as wearing protective clothing, applying insect repellents, and eliminating breeding sites for mosquitoes. Additionally, vaccination is an effective way to prevent JE, particularly in high-risk areas.
**Correct Answer: C. Culex mosquitoes.**