(a) How do mosquitoes carry disease-causing micro-organisms and spread diseases?
(b) Mention any three ways of preventing diseases spread by mosquitoes.
(a) How do mosquitoes carry disease-causing micro-organisms and spread diseases?
(b) Mention any three ways of preventing diseases spread by mosquitoes.
a) Mosquitos feed on blood. When they bite they inject their saliva into the site to keep the blood from clotting (and which later causes the itchy sensation). Some infectious pathogens like the malarial parasite gets into the gut of mosquito when it drinks the blood of an infected person.
The germ migrates to the glands that produce the anticoagulant and gets injected into the blood of the next person bitten. The different mosquito are responsible to cause diseases like malaria, dengue and yellow fever.
b) There are a few measures you can take to prevent diseases spread by mosquitoes in general:
- Use insect repellent
- Wear long-sleeved shirts and pants.
- Use windows and door screens.
- Sleep with a bed net
- Stay in air-conditioned rooms
- Avoid keeping the water stagnant
a) Mosquitos feed on blood. When they bite they inject their saliva into the site to keep the blood from clotting (and which later causes the itchy sensation). Some infectious pathogens like the malarial parasite gets into the gut of mosquito when it drinks the blood of an infected person.
The germ migrates to the glands that produce the anticoagulant and gets injected into the blood of the next person bitten. The different mosquito are responsible to cause diseases like malaria, dengue and yellow fever.
b) There are a few measures you can take to prevent diseases spread by mosquitoes in general:
- Use insect repellent
- Wear long-sleeved shirts and pants.
- Use windows and door screens.
- Sleep with a bed net
- Stay in air-conditioned rooms
- Avoid keeping the water stagnant
