Page 103 - Primary Six Notes

1. Female anopheles mosquitoes spread a protozoan called

plasmodia which causes malaria in man.

2. Culex mosquitoes spread worms called Filarial which caus-

es elephantiasis

3. Aedes or tiger mosquitoes spread a virus causes dengue

fever and yellow fever in human beings.

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Life cycle of mosquitoes

a. Adult mosquitoes lay eggs in stagnant water.

b. After 2-3 days the eggs hatch into larva called Wranglers

which breathe through a spiracle on the tail end called Si-

phon.

c. The larva develop into called Tumblers which breathes

through a pair of spiracles called breathing trumpets

d. After 2-3 weeks from eggs a fully grown adult comes out of

the pupa.