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प्रश्न
How disease causing microorganisms enter into human beings?
उत्तर
The disease-causing microbes are called pathogens. They enter into the body through –
- Cuts and wounds in the skin, mouth, or nose.
- Some pathogens are found in the air and enter into a healthy person by breathing. When a patient sneezes, droplets containing microbes spread into the air.
Example: Tuberculosis, Flu. - Some pathogens enter our body through food and water contaminated with the pathogen.
Example: Cholera. - Pathogens also enter through blood transfusion from an infected to a healthy person.
Example: Aids
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