Page 166 - Health, Population and Environment Education 10

About 3 crore people get infected with dengue fever annually. This disease is very
common in warm climates. However, this disease is found worldwide. For the first time,
the vaccine against dengue fever was discovered in 2016 AD.

Fig: 21
Aedes aegyptii mosquito Eggs of Aedes aegyptii

Habit of the mosquito that transmits dengue fever
i. Aedes mosquito (female) lays eggs in clean water.
ii. It lays eggs in clean water, in the water stored, in empty tin cans, containers of paint,
drums, old tyres, tubes, etc. during rainy season.
iii. It lays eggs in water stored in vases, air conditioner, cooler, etc.

Major Symptoms

1. Sudden high fever
2. Fever remains for 5-7 days
3. Severe headache
4. Pain in the pupil and backside of head

5. Rashes in the body
6. Bleeding from the nose and gums
7. Pain in joints, bones and muscles Fig: 22

8. Nausea
9. Vomiting
10. Pain in abdomen
11. Tiredness

12. Unconsciousness

Preventive and Control Measures
1. Mosquito-bite should be avoided.
2. Mosquitoes should be controlled.

166 GREEN Health, Population and Environment Education Book-10