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State the method of transmission of each of the following:

i. Cholera ii. AIDS iii. Malaria iv. Pneumonia.

Cholera is transmitted through the consumption of contaminated food and water

AIDS 

(i) through sexual contact
(ii)blood transfusion
(iii)use of infected syringes, needles or blades, etc.
(iv)from an infected other to her foetus.

Malaria- Through bite of female Anopheles mosquito carrying the Plasmodium responsible for the disease.

Pneumonia may spread through the air, by direct contact with an infected person, or by contaminated objects.

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1) cholera -  bacterium vibrio cholerae

2)  AIDS -  It can be transmitted through sexual contact or by sharing needles infected with the HIV virus.

3) Malaria - Usually, people get malaria by being bitten by an infective female Anopheles mosquito. OnlyAnopheles mosquitoes can transmit malaria and they must have been infected through a previous blood meal taken from an infected person. When a mosquito bites an infected person, a small amount of blood is taken in which contains microscopic malaria parasites. About 1 week later, when the mosquito takes its next blood meal, these parasites mix with the mosquito's saliva and are injected into the person being bitten.

 

4) Pneumonia - bacteria Streptococcus pneumoniae.

You may get pneumonia:

a)After you breathe infected air particles into your lungs.

b)After you breathe certain bacteria from your nose and throat into your lungs. This generally occurs during sleep.

c)During or after a viral upper respiratory infection, such as a cold or influenza (flu).

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