9th Class Science Why do we fall Ill? Principle of Prevention

Principle of Prevention

Category : 9th Class

*        Principle of Prevention


One of the basic principle of prevention is the community hygine. We can prevent the communicable disease by increasing the public awareness regarding the causes of disease. While treating the infectious disease we normally face the problems like unrecoverable situation of the patient one he suffers from the disease, the treatment taking long time to cure and lastly we have to take care that it does not spread from one person to another. Thus, we can say that prevention is, much better than cure. To prevent the spread of disease we should have proper living condition that is hygienic. There should be proper facility of safe drinking water and clean surroundings. If some one is suffering from the disease we should keep him away from the others, till he gets well properly. The best way to prevent the disease is to immunize the children against various disease, by giving them vaccines. The process of inducing vaccine to the children against certain disease is called vaccination.




          What do we call the uncontrolled growth of tissue in any parts of body?

(a) Deficiency disease

(b) Degenerative disease

(c) Cancer

(d) Metabolic disorder

(e) None of these


Answer: (c)



        Identify the figure given below:

(a) Bacteria                                        

(b) Polio virus

(c) Fungus

(d) Protozoa

(e) None of these


Answer: (b)



        The insect vectors which cause yellow fever is:

(a) Anopheles mosquitoes

(b) Culex

(c) Aedes

(d) Housefly

(e) None of these


Answer: (c)



         Who first discovered the disease TB?

(a) Louis Pastures 

(b) J.Martin

(c) M.Thomas

(d) Robert Koch

(e) None of these


Answer: (d)



Match the following columns first and second:

Sr. No. Disease   Agents
1 TB a Vibro Cholerae
2 Ring Worm b Wuchereria Histoltica
3 Cholera c Fungi
4 Elephantitis d Myccobacterium Tuberculosis

(a) 1-b, 2-c, 3-a, 4-d

(b) 1-d, 2-c, 3-a, 4-b

(c) 1-c, 2-d, 3-a, 4-b

(d) 1-d, 2-b, 3-a, 4-c

(e) None of these


Answer: (b)




  • The malfunctioning of the body is called disease.
  • There are two types of disease acute and chronic disease.
  • The disease which is transmitted from one person to the another is called communicable disease.
  • Aids is a sexually transmitted disease.
  • The organisms which carry the pathogens are called vectors.


You need to login to perform this action.
You will be redirected in 3 sec spinner