Context:

Karnataka records over 9,000 dengue cases and 7 deaths this year

The Bruhat Bangalore  Mahanagara Palike (BBMP) areas have recorded 2,830 cases from January to July 13, the highest in the state, with 110 hospitalizations.

Dengue case in Karnataka

• “About 7,000 people are infected. Bengaluru alone is reporting 500 to 700 cases daily. Cases are rising in Chikkamagaluru, Mysuru, and Hassan also,”
• Dengue infections are caused by four closely related viruses named DEN-1, DEN-2, DEN-3, and DEN-4. These four viruses are called serotypes
• The dengue virus is transmitted to humans through the bites of infected female mosquitoes, primarily the Aedes aegypti

What are the Highlights of the Study?

• In India, the number of months suitable for dengue transmission by Aedes Aegypti mosquitoes has risen to 5.6 months each year.
• It accounts for a 1.69% increase between 1951-1960 and 2012-2021.
• The study projected “expansion of Aedes aegypti in the hot arid regions of the Thar Desert and Aedes albopictus in cold upper Himalayas as a result of future climatic changes.
• Dengue spreads through the bite of two mosquitoes — Aedes aegypti and Aedes albopictus.
• Currently, Aedes aegypti is prevalent in the southern peninsula, eastern coastline, north-eastern states and the northern plains.
• Aedes albopictus dominates the eastern and western coastlines, north-eastern states and the lower Himalayas.