Maharashtra State BoardSSC (English Medium) 7th Standard
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Give reasons. Diseases spread on a large scale during periods of heavy rainfall and floods. - General Science

Answer in Brief

Give reasons.

Diseases spread on a large scale during periods of heavy rainfall and floods.

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Solution

Diseases spread on a large scale during periods of heavy rainfall and floods because it provides the optimum conditions for the growth of vectors which transmit diseases. After heavy rainfall and floods, water gets accumulated at places and acts as breeding grounds for mosquitoes and other vectors. These vectors lead to transmission of the microorganisms to their host and result in the development of disease.
For example, malaria is caused by a virus which is transmitted by a mosquito.

Concept: Pathogens
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APPEARS IN

Balbharati General Science 7th Standard Maharashtra State Board
Chapter 11 Cell Structure and Micro-organisms
Exercise | Q 6.1 | Page 80
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