Question

explain the different means of spread

Answer 1

spread means extend a over large area increase

Answer 2

The different modes of transmission/spread of infectious diseases are as follows:

A. DIRECT TRANSMISSION/SPREAD

(i) By direct contact: Disease like AIDS, leprosy, skin, eye infections are transmitted by direct contact with source.(ii) By droplets: Diseases like respiratory infections, common cold, diphtheria, tuberculosis, etc, are transmitted by droplets.(iii) By contact with soil: Soil has disease agents like hookworm larvae, etc. that cause diseases like tetanus.(iv) By inoculation: Inoculation into skin through contaminated needles and syringes, etc. of rabies virus, syphilis, hepatitis B and AIDS, etc.

B. INDIRECT TRANSMISSION/SPREAD :

Transmission of disease-causing microbes takes place through vectors like flies, etc. For example: typhoid.

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