DENGUE (Syllabus: GS Paper 3 – Sci and Tech)

News-CRUX-10     11th May 2024        
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Context: Researchers have found a potential link between anomalies in sea-surface temperatures in Indian Ocean and the intensity of dengue epidemics globally, offering hope for improved prediction of dengue outbreaks.


  • About: It is a viral infection transmitted through the bite of infected Aedes species mosquitoes.
  • Found: Tropical and sub-tropical climates worldwide, mostly in urban and semi-urban areas.
  • Symptoms: Usually begin 4–10 days after infection and last for 2–7 days. Symptoms may include: high fever, severe headache, pain behind the eyes, nausea, vomiting, swollen glands and rash.
  • Severe Symptoms: severe abdominal pain, persistent vomiting, rapid breathing, bleeding gums or nose, fatigue and restlessness.
  • Treatment: There is no specific treatment for dengue.

Indian Ocean basin-wide (IOBW) Index

  • About: It represents the regional average of sea surface temperature anomalies in the tropical Indian Ocean.
  • Association with: IOBW is closely associated with dengue epidemics in both the Northern and Southern hemispheres.

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