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CASE STUDY: DENGUE FEVER

Symptoms

  • High fever
  • Headaches
  • Extreme pain in muscles and joints
  • Rash
  • Can result in death with dengue hemorrhagic fever, which primarily affects children

Scope

  • Primarily tropical but spreads to other areas in summer
  • Affects only humans
  • Occurs mostly in densely populated cities
  • Could infect nearly half of Earth's population

click to enlarge image World distribution of dengue in 2000. Source: CDC
Source: Center for Disease Control and Prevention

Source And Vector

  • Caused by virus
  • Spread by mosquitoes

Impact Of Global Warming?

  • Social conditions (lack of screens or indoor plumbing) and urban sprawl may be more important than climate
  • Warming temperatures can speed viral development inside the mosquito
  • Mosquitoes bite more frequently when it's hot
  • Bottom line: Possible increase, but only if poor urban conditions continue
B12_dengue2_sm
As temperatures climb, the dengue “season” in the U.S. will lengthen.
Source: United Nations Environment Programme

Additional information