Understanding Mosquito-Borne Viral Diseases

This question asks us to identify a specific type of disease: one that is both caused by a virus and transmitted by mosquitoes. Let's break down the options to see which one fits this description.

Analyzing Disease Transmission and Cause

We need to examine each option based on its causative agent (virus or bacteria) and its mode of transmission (how it spreads).

Mosquito-Borne Transmission Explained

A mosquito-borne disease is an illness transmitted by the bite of an infected mosquito. Viruses, bacteria, or parasites can cause these diseases.

Option Breakdown:

• 1. Dengue:
  • Cause: Dengue is caused by the dengue virus (DENV).
  • Transmission: It is primarily transmitted through the bites of infected female Aedes mosquitoes (specifically Aedes aegypti and Aedes albopictus).
  • Conclusion: Dengue fits the criteria of being a mosquito-borne viral disease.
• 2. Tuberculosis (TB):
  • Cause: Tuberculosis is caused by the bacterium Mycobacterium tuberculosis.
  • Transmission: TB spreads through the air when an infected person coughs, sneezes, or spits. It is not transmitted by mosquitoes.
  • Conclusion: TB is a bacterial disease, not a viral one, and is not mosquito-borne.
• 3. Chickenpox:
  • Cause: Chickenpox is caused by the varicella-zoster virus (VZV).
  • Transmission: It spreads easily from person to person through direct contact with the rash, or through breathing in the virus particles that land on a surface or skin, or are coughed/sneezed into the air. It is not transmitted by mosquitoes.
  • Conclusion: While Chickenpox is viral, it is not mosquito-borne.
• 4. Measles:
  • Cause: Measles is caused by the measles virus.
  • Transmission: It is highly contagious and spreads through respiratory droplets produced when an infected person coughs or sneezes. It is not transmitted by mosquitoes.
  • Conclusion: Measles is a viral disease, but it is not mosquito-borne.

Identifying the Correct Disease

Based on the analysis, Dengue is the only disease listed that is both caused by a virus and transmitted by mosquitoes. Therefore, Dengue is the correct answer when looking for a mosquito-borne viral disease.