1. Dengue Prevention
What you need to know…

2. What is dengue fever?
Dengue fever is a virus infection caused by the dengue
virus. There are 4 kinds of dengue viruses.
Close-up of an Aedes mosquito

3. Aedes mosquito
Aedes Aegypti
Aedes Albopictus

4. Symptoms of Dengue Fever
Example of a skin rash
due to dengue fever

5. Do you know…
•Dengue fever and dengue haemorrhagic fever are the
most common mosquito-borne viral disease in the world.
•Only the female mosquito feeds on blood. This is
because they need the protein found in blood to produce
eggs. Male mosquitoes feed only on plant nectar.
•The mosquito is attracted by the body odours, carbon
dioxide and heat emitted from the animal or humans.
•The female Aedes mosquito searches for suitable places to
lay their eggs.
•Aedes are day-biters, most active during dawn and
dusk.

6. Life cycle of the Aedes mosquito
1-2 days
Larvae
Pupae
4-5 days
Eggs
2-3 days
Stagnant water

7. How Do Aedes mosquitoes Transmit
Diseases...
Mozzie bites an
infected person
Healthy
person
comes down
with
dengue
fever
Infected
mozzie bites
a healthy
person

8. This is what you
can do to help…

9. Prevent Mosquitoes from Breeding!
Remove ALL sources of stagnant water.
Deny the Aedes mosquito of any chance to
breed.

10. Potential Breeding Grounds

11. Common Mosquito Breeding Grounds
Artificial containers (man-made)
1. Flower vases and pot plates
Natural containers
2. Pails, water-storage jars, basins
1. Tree Holes, bamboo
stumps
3. Discarded receptacles
2. Leaf axils, fallen leaves
4. Choked roof gutters
3. Ground Depressions
5. Gully Traps
6. Unused toilet bowls and cisterns
7. Aircon Tray and dish rack tray
8. Concrete drains
All these sites require constant
inspection !!

12. Potential Breeding Grounds
Flower Pots
Flower Pot Plates

13. Potential Breeding Grounds
Overflow cistern of the WC
Gully Trap

14. Potential Breeding Grounds
Collar of the toilet bowl

15. Potential Breeding Grounds
Hardened soil of potted
plants
Tree holes

16. Potential Breeding Grounds
Plant axils

17. Potential Breeding Grounds
Scupper drains
Bamboo pole holders

18. Potential Breeding Grounds
Road side drain
Barbeque pit

19. Potential Breeding Grounds
Canvas sheets

20. Potential Breeding Grounds
Discarded receptacles

21. Potential Breeding Grounds
Air-con tray

22. Potential Breeding Grounds
Roof gutters
Litter Bins

23. The 10-Minute
Mozzie Wipe-Out
Exercise

24. 1.
5 Easy Steps
•Change water in
vases/ bowls every
other day.
•Add sand granular
insecticide* to water.
*You can view the list of retailers carrying sand
granular insecticide at the following webpage:
http://www.nea.gov.sg/aedes/insecticides

25. 2.
5 Easy Steps
•Remove water from
flower pot plates every
other day.

26. 3.
5 Easy Steps
•Turn over all storage
containers

27. 4.
5 Easy Steps
•Inform your parents
or any adults in your
household to cover
bamboo pole holders
when not in use.

28. 5.
5 Easy Steps
•Clear blockages and
put Bti insecticide in
roof gutters at least
once a month

29. What Else Can You Do…
Check your landscape
structures for any water
retention & mosquito
breeding regularly. Remove
these structures if
possible.
Add in prescribed amounts
of sand granular
insecticides to stagnant
water.

30. Use of the Anti-mosquito valve

31. If you are going on
holiday or vacating
your home…

32. If going on holiday..
•Seal off all floor and
gully traps
•Cover all toilet bowls

33. If going on holiday..
Leave your contact
number with your
neighbor so that the
NEA can contact you
should there be a need
to inspect your premises
urgently.

34. Spread the dengue prevention
message to others…
Let your family,
friends and
neighbours know
about the dangers
of breeding
mosquitoes

35. How to Prevent Mosquitoes Bites
Wear shoes, socks, long pants and long-sleeved
shirt
Use mosquito repellents
Mosquito coils
Mosquito nets

36. For more information,
you can visit the
website at
www.dengue.gov.sg