Question

What is a communicable disease?
A. It is a disease that can be spread to others and is contagious
B. It is a disease that cannot be spread and is caused by health habits and behaviours
C. It is a disease that is caused by bacteria in our environment
D. It is a disease that can be spread through food, animals, water and the air
E. All of the above

Answer 1

Hint: The word disease means disturbed ease. It refers to any condition that impairs normal functioning of the living organisms. Disease may be a response to environmental factors, specific infective agents or inherent defects of the organisms or might be malfunctioning of organs with age.
The diseases caused by some biological agents or pathogens such as viruses, bacteria, fungi, etc. are called infectious diseases.

Complete Answer-
Infectious diseases can be spread from an infected person to a healthy person in various ways. These diseases can be communicated and therefore are called communicable diseases. The communicable diseases are the contagious ones as they are transmitted from person to person by extrinsic factors.
These diseases are caused by external factors like pathogens while intrinsic as well as extrinsic factors such as heredity factors, health and hygiene are the effective measures for non-infectious diseases.
Communicable or infectious diseases are classified on the basis of pathogens like bacterial, viral, fungal, protozoan diseases etc. these diseases caused by bacteria present in an environment as well as other infectious agents.
These infectious diseases are transmitted by food, water, air and insects. Air transmitted diseases are easier to spread.

So, the correct answer is option (E) All of the above because all the above discussed statements are correct for communicable diseases.

Note-
Antibiotics are the chemical substances produced mainly by microorganisms which at low concentration have the ability to inhibit the growth of other microorganisms. One antibiotic can work against many species of bacteria rather than working for a simple one.
Public hygiene is necessary for prevention of infectious diseases and the availability of proper food for everyone is the second basic principle of prevention.