Communicable and Non-Communicable diseases/ modes of transmission of Communicable diseases.

Communicable diseases, modes of transmission
Communicable diseases


Communicable diseases are the diseases that are caused by germs or worms or parasites. usually, these diseases are infectious and spread from a person suffering from the disease to a healthy person. tuberculosis, malaria, smallpox, cholera, measles etc are communicable diseases.

Non-Communicable diseases.
 Non-Communicable diseases


Non-communicable disases are the diseases that are not caused by germs directly or indirectly. in fact, such diseases are caused by inefficiency of some internal organs or by the deficiency of vitamins or minerals. such diseases are caused by lack of balanced diet or non-availability of healthy environment. eyes diseases, mental diseases, rickets, anaemia, blood pressure, diabetes, postural defects and diseases of teeth etc, are main examples of non-communicable diseases.


There are various modes of transmission of communicable diseases. these are described below:

1. Through air- air is a very vital carrier of communicable diseases. when an individual breathes out, coughs or sneezes, he/she sprays out certain infected droplets in air. these infected droplets enter the body of a healthy person, when he breathes in fresh air, so he is also infected. sometimes, while breathing, we inhale some dust particles that are infected. influenza, cough, cold, tuberculosis, smallpox and measles etc, are such communicable diseases which are usually spread through air.

2. Through direct contact- direct contact is also an important mode of transmission of communicable diseases. kissing, body contact and shaking hands etc, are included under the direct contact category. sexually transmitted diseases (STDs), syphilis and scabies etc, are such diseases that are usually spread through direct contact.

3. Through indirect contact- not only the direct contact of the infected person causes communicable disease but even a healthy individual catches the communicable disease, when he/she comes in contact with the clothes, books, handkerchief, furniture like chair and tables, stationery of a person suffering from a communicable disease. smallpox, scabies, scarlet fever, eczema, ringworm etc, are spread through indirect contact.

4. Through food and drinks- communicable diseases also spread through food and drinks. when a healthy person take food that had come in contact with the person suffering from infectious disease, germs enter his/her body and he/she falls ill. the germs of tuberculosis, which are present in the milk, cause tuberculosis. flies also sit on the food and spoil it. flies usually sit on the sputum of a patient and also sit on the food. so, it can be said that flies infect food. most of the diseases, that are caused by infected food and drinks are cholera, diphtheria, dysentery, enteric fever, scarlet fever, typhoid and tuberculosis etc.

5. Through insects- there are some insects, which are the main carriers of germs. mosquitoes, bugs, lice suck the blood of a patient, the germs stick to their trunks or strings and when the same insect bites a healthy person, the germs are left in his/her body and thus these germs infect the body. some of the diseases, which are caused by small living creatures are yellow fever, enteric fever, cholera, diarrhoea, filaria, plague, malaria and typhoid etc.

6. Through skin- there may be some cuts on the skin from spade, blade, scythe or knife. certain germs may enter into cuts and may cause diseases like anthrax and tetanus.

7. By parents- some communicable diseases like tuberculosis and diabetes are spread by parents if the parents are having the germs of such diseases. these diseases are inherited in the offspring through the genes of parents.

8. Through genital organs- AIDS, syphilis and gonorrhoea are such diseases that spread through genital organs. when a partner, who has the germs of such diseases, has sex with healthy partner, he/she infects the other partner.

9. Through dirty hands- dirty hands may also cause infectious diseases. poliomyelitis and dysentery are such diseases that spread through dirty hands. some children do not clean their hands properly which are infected by germs of such diseases. these germs may enter their bodies with food and hence they fall ill.

10. Through disease carriers- some person carry germs of diseases even then they do not fall ill but usually pass their germs to other healthy persons. these healthy persons may fall ill. the persons, who pass these germs to others, are called carriers. they have immunity against such diseases. Typhoid may be spread through carriers.

Post a Comment