2. Contents
1. What is dengue fever
2. Symptoms of dengue fever
3. Characteristics of the Aedes mosquito
4. Life cycle of the Aedes mosquito
5. How the Aedes mosquito transmit diseases
6. How to prevent the spread of dengue fever
7. The 10-Mininute Mozzie Wipe-out Exercise
8. Quiz
3. What is dengue fever?
Dengue Fever is an illness caused by
infection with a virus transmitted by the
Aedes mosquito.
5. Do you know…
Dengue Fever (DF) and Dengue
Haemorrhagic Fever (DHF) are the most
common mosquito-borne viral disease in
the world.
It can be fatal.
6. Characteristics of the
Aedes Mosquito
One distinct physical
feature – black and
white stripes on its
body and legs.
Bites during the day.
Lays its eggs in
clean, stagnant water.
Close-up of an Aedes mosquito
7. Only the female Aedes mosquito
feeds on blood. This is because
they need the protein found in
blood to produce eggs. Male
mosquitoes feed only on plant
nectar.
On average, a female Aedes
mosquito can lay about 300 eggs
during her life span of 14 to 21
days.
Do you know…
9. How Do Aedes Mosquitoes Transmit
Diseases...
Mosquito bites and sucks
blood containing the virus
from an infected person.
Virus is carried in its
body.
And passes the virus
to healthy people
when it bites them.
13. Do the 10-Minute Mozzie Wipe-out everyday.Do the 10-Minute Mozzie Wipe-out everyday.
Change water in vases on alternate days.
14. Do the 10-Minute Mozzie Wipe-out everyday.Do the 10-Minute Mozzie Wipe-out everyday.
Remove water from flowerpot plates on
alternate days.
15. Do the 10-Minute Mozzie Wipe-out everyday.Do the 10-Minute Mozzie Wipe-out everyday.
Turn over all pails and water
storage containers.
16. Do the 10-Minute Mozzie Wipe-out everyday.Do the 10-Minute Mozzie Wipe-out everyday.
Cover bamboo pole holders
when not in use.
17. Do the 10-Minute Mozzie Wipe-out everyday.Do the 10-Minute Mozzie Wipe-out everyday.
Clear blockages and put Bti insecticide in roof
gutters monthly.
20. • Cover all toilet bowls in your home.
• Seal off the overflow pipe of the flushing cistern.
• Cover all gully/floor traps.
• Add sand granular insecticide to places that
mosquitoes could potentially breed, such as flower
vases and places where stagnant water could not be
removed.
Before you leave for holidays…Before you leave for holidays…
21. • Clear blockages and add Bti insecticide in roof
gutters.
• Turn over all water storage containers.
•Ask a relative or close friend to check your home
regularly for stagnant water if you are going away
for a long period of time.
• Leave your contact with your neighbours or the
neighbourhood police post/ centre so that you can
be reached easily.
Before you leave for holidays…(Cont’d)Before you leave for holidays…(Cont’d)
22. Spread the dengue prevention
message to others…
Let your family,
friends and
neighbours know
about the dangers of
breeding Mozzies!!
26. ANSWER:
It can carry the dengue virus and
infect a healthy person with dengue
fever.
27. Name the 5 steps in the
10-Minute Mozzie Wipe-
out Exercise
28. ANSWER:
1. Change water in vases on alternate.
2. Remove water from flowerpot plates on alternate days.
3. Turn over all pails and water storage containers.
4. Cover bamboo pole holders when not in use.
5. Clear blockages and put in Bti insecticide in roof gutters
monthly.
29. What are the things that you
should do before going for a
holiday?
30. ANSWER:
• Cover all toilet bowls in your home.
• Seal off the overflow pipe of the flushing cistern.
• Cover all gully/floor traps.
• Add sand granular insecticide to places that mosquitoes could
potentially breed, such as flower vases and places where stagnant water
could not be removed.
•Clear blockages and add Bti insecticide in roof gutters.
• Turn over all pails and water storage containers.
•Ask a relative or close friend to check your home regularly for stagnant
water if you are going away for a long period of time.
• Leave your contact with your neighbours or the neighbourhood police
post/ centre so that you can be reached easily.
Good morning/afternoon everyone, I’m sure you all know that dengue is a serious problem now, but how much about dengue do you really know?
Today I’ll be sharing with you more information about dengue, meant for all schools, from The National Environment Agency. I will explain how dengue is spread and what we can do to stop it. Please listen carefully as dengue can strike anyone…you and me.
How do you know if you have dengue fever? You have dengue fever if you have a fever that does not go away even after a few days; You may also experience headaches, muscle and joint pains, skin rash, and vomiting.
Dengue fever and dengue haemorrhagic fever are the most common diseases spread by the Aedes mosquitoes. The mosquitoes can carry 4 different types of dengue viruses hence you can be infected with dengue fever more than once. If you had dengue fever before and are infected again, you are more likely to develop the more deadly and serious dengue haemorrhagic fever.
Now I’ll tell you about the Aedes mosquito which spreads dengue. 1) You can identify an Aedes mosquitoe from other mosquitoes by the black & white stripes on its body and legs. Because of this, it is also known as the ‘tiger mosquito. 2) It usually bites during the day. 3) The Aedes mosquito lays its eggs in clean, stagnant water. A pool of water as small as a twenty cent coin is all that is needed for it to breed.
Only the female mosquitoes feed on blood, as they need the blood protein to lay their eggs. Despite a short life span of two to three weeks, each female Aedes mosquito is able to lay up to 300 eggs.
As seen in this diagram of the Aedes mosquito’s life cycle, it only takes about a week for the mosquito complete the 4 stages consisting of the egg, larva and pupa stage before it becomes an adult mosquito. As one female mosquito lays up to 300 eggs each time, just imagine how many mosquitoes can be hatched!
We all know by now that the Aedes mosquito spreads the dengue virus, but how exactly do they do it? Mosquitoes cannot transmit the dengue virus amongst themselves, they need to first bite a person who is already infected with the dengue virus. The infected mosquito will then carry the dengue virus and pass it onto a healthy person when it bites him/her and causing them to fall sick. The cycle then continues with the new victim.
So now that you know more about the dengue, what can you do to stop it?
The most important thing you need to do is to stop the Aedes mosquito from breeding. Remove all stagnant water. Don’t let it lay its eggs.
Here are the 10-minute mozzie wipe out exercise that you could work on to help get rid of stagnant water in and around your house.
Change water in vases on alternate days.
Remove water from flower-pot plates on alternate day.
Turn over all pails and water storage containers.
Tell your parents or any adults in your house to cover bamboo pole holders when they are not in use.
And tell your parents or any adults in your house to clear blockages and put BTI insecticide in roof gutters monthly.
Do not litter. Rubbish such as cups ad bottles can collect rain water and breed mosquitoes.
If you are going on holiday and there is no one in your house, there are a few things you should do before you leave to stop mosquitoes from breeding.
Cover all toilet bowls in your home. Seal off the overflow pipe of the flushing cistern. Cover all gully/floor traps. This prevents mosquitoes from getting to the water inside these places and breeding when you are away. Add sand granular insecticide to places that mosquitoes could potentially breed, such as flower vases and places where stagnant water could not be removed.
Clear blockages and add Bti insecticide in roof gutters. Ask a relative or close friend to check your home regularly for stagnant water if you are going away for a long period of time. Leave your contact with your neighbours or the neighbourhood police post / centre you can be reached easily.
You can also help prevent dengue by telling people what you have learned today. Tell your family, friends and neighbours why mosquito breeding is bad and how they can help stop it.
If you want to know more about dengue, you can visit the website www.dengue.gov.sg for more information.
We will now have a quiz to test how much you have learnt about dengue and Aedes mosquito. We are giving away some tokens for those who answer correctly.
