Dr. K C Trikha and N K Sehgal Solutions for Chapter: Microorganisms: Friends or Foes, Exercise 1: Something To Know

How do communicable diseases spread? Suggest ways to prevent the following diseases:
(a) Tuberculosis
(b) Athlete's foot
(c) Cholera

What are pathogens? Name two pathogens each that cause diseases in plants and animals.

Mohan bought samosas from a road-side vendor and ate it. After sometime he felt nausea and started vomitting. He had severe pain in the abdominal region and suffered from diarrhoea. What could be the reason for his condition? What is it called? How could it be prevented?

Ramu drinks water from a nearby lake. This water is neither boiled nor disinfected. Which disease is Ramu most likely to suffer from?

Ashu does not have a bath every day. He maintains poor personal hygiene. Which disease is he most likely to suffer from?

Pulkit has been bitten by an infected street dog. Which diseases is he most likely to suffer from?

Sohan is living in an area where the population is very high. He does not use a mosquito net (while sleeping), or insect-repellent creams (while playing in the open). Which disease is he most likely to suffer from?

Mohan was with two of his friends who were coughing and sneezing (they were suffering from common cold). One of these friends did not keep a handkerchief in front of his mouth while coughing and sneezing. Which disease is he most likely to suffer from?