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2. Micro-Organisms: Friends and Foe
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Q66 of 104 Page 41

What are the various ways in which communicable diseases can occur and spread?

The communicable diseases can occur and spread in the following ways:

● Through air we breathe


● Through water we drink


● Through food we eat, and


● Through carriers such as mosquito.


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65

State the causative micro-organisms and modes of transmission of the following human diseases :

(i) Tuberculosis


(ii) Measles


(iii) Chickenpox


(iv) Polio


(v) Cholera


(vi) Typhoid


(vii) Hepatitis B


(viii) Malaria


(ix) Dengue

66

What is meant by communicable diseases? Name any two communicable diseases.

67

Name any five human diseases caused by micro-organisms. Also name the causative micro-organisms and mode of transmission for each of these diseases.

67

State the various ways of preventing the occurrence and spreading of communicable diseases.

Questions · 104
2. Micro-Organisms: Friends and Foe
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