| Infectious Diseases | Non-Infectious Diseases |
|---|---|
| 1. Caused by external factors e.g. pathogens | 1. Caused by internal factors e.g. genetic abnormality |
| 2. Diseases can spread unhealthy person to healthy person. | 2. Diseases do not spread from infected to a healthy person. |
| 3. Infection can spread and infect others via direct contact or medium (air, water, vectors etc.) | 3.Infection does not spread through direct contact nor by the medium. However, it may be hereditary i.e. from parents to offspring. |
| 4. Examples: Malaria, Dengue etc. | 4. Examples: Goitre, High Blood pressure, Diabetes |
Differentiate between communicable and non-communicable diseases. Give one example of each.
Give two examples for each of the following :
(a) Acute diseases
(b) Chronic diseases
(c) Infectious diseases
(d) Non-infectious diseases.
Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.
You have suffered from chickenpox, when you were in class three. Why will you not suffer from it again ? [SAII -2014]
Majority of children in many parts of India are already immune to Hepatitis A by the time they are five years old. Why ?
What do signs and symptoms indicate if a person is suffering from any disease ? [SAII -2014]
(i) Why a person suffering from AIDS cannot fight even small infections ?
(ii) In a slum area, many people are suffering from malaria. Mention any two unhygienic conditions that must be prevailing in that locality.
(iii) Why female Anopheles mosquito feeds on human blood ? [SAII – 2014]
(i) What is an epidemic disease ?
(ii) Which organ is affected if a person is suffering from jaundice ?
List any three reasons why you would think that you are sick and ought to see a doctor. If only one of these symptoms were present, would you still go to the doctor ? Why or why not ?
State giving reasons whether the following statements are correct or not:
Many vaccines form the public health programme of childhood immunisation for preventing infectious disease. Name any two such diseases.
The signs and symptoms of a disease will depend on the tissue or organ which the microbe targets Justify the statement with two examples. [SAll – 2014]
Why are we normally advised, to take bland and nourishing food when we are sick ? [SAII – 2011, 2013]
Classify the following diseases as infectious or non-infectious :
(a) AIDS (b) Tuberculosis
(c) Cholera (d) High blood pressure
(e) Heart disease (f) Pneumonia
(g) Cancer
How many times did you fall ill in the last one year ? What were the illnesses ? (a) Think of one change you could make in your habits in order to avoid any/most of the above illnesses.
(b) Think of one change you would wish for in your surroundings in order to avoid any/most of the above illnesses.