Why is it only the female mosquito that transmits malaria?

Only the female takes blood meals, which she needs as a source of protein for developing her eggs, and the male feeds on plant nectar instead.

Which two human tissues does Plasmodium parasitise?

Plasmodium first multiplies inside the cells of the liver and then inside the red blood cells.

How does Plasmodium pass from the mosquito into the human bloodstream?

Infective sporozoites collect in the mosquito's salivary glands, and are injected into the blood along with the anticoagulant saliva when she pierces the skin to feed.

What happens to Plasmodium during the stage it spends in the liver?

The sporozoites enter liver cells and divide asexually many times to form large numbers of merozoites, which are then released into the blood to invade red blood cells.

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Immunology and Disease: Disease and Its Transmission

Malaria and its transmission

3 things to know
Component 3

Overview

Recall questions on Plasmodium and the Anopheles mosquito as vector, the stages in the human host, the symptoms and their timing, why the disease is hard to eradicate, and the methods used to control it.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

How can the mosquito population be reduced in order to control malaria?

Key term

Name the genus of protoctistan that causes malaria and the species responsible for most deaths.

Key term

Which organism is the vector of malaria?

Questions from this subtopic

Each one with the model answer underneath.

1
Name the genus of protoctistan that causes malaria and the species responsible for most deaths.
Model answer
Malaria is caused by protoctistans of the genus Plasmodium, and Plasmodium falciparum is responsible for most of the deaths.
2
Which organism is the vector of malaria?
Model answer
The vector is the female Anopheles mosquito.
3
Why is it only the female mosquito that transmits malaria?
Model answer
Only the female takes blood meals, which she needs as a source of protein for developing her eggs, and the male feeds on plant nectar instead.
4
Which two human tissues does Plasmodium parasitise?
Model answer
Plasmodium first multiplies inside the cells of the liver and then inside the red blood cells.
5
How does Plasmodium pass from the mosquito into the human bloodstream?
Model answer
Infective sporozoites collect in the mosquito's salivary glands, and are injected into the blood along with the anticoagulant saliva when she pierces the skin to feed.
6
What happens to Plasmodium during the stage it spends in the liver?
Model answer
The sporozoites enter liver cells and divide asexually many times to form large numbers of merozoites, which are then released into the blood to invade red blood cells.

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