Question

Communicable diseases are pathogenic diseases which are spread from
person to person either directly or indirectly. Write the mode of transmission
of the following diseases.
i) Cholera, typhoid
ii) Malaria

TNSCERT Class 8 Science Ch4. Microorganisms

Answer 1

cholera n typhoid r spread through contaminated food or water....basically water.
malaria is spread by d bite of mosquito ie female anopheles

Answer 2

1) Cholera, typhoid transmits through food and water when flies sit on them

ii) Malaria- it gets transmitted through female anopheles mosquito which breed in water