Question

In order to prevent spreading of communicable disease like cholera it is necessary to
A.Control the population of mosquitoes
B.Dry up all ponds in the neighbourhood
C.Educate people to drink boiled water and not to eat exposed food
D.Prevents others from coming in contact with the diseased person

Answer 1

Hint:- Communicable diseases are those which spread from one person to another through any means which can involve direct contact with the diseased person, drinking contaminated water, sharing of blood with an infected person, consuming contaminated food, inhaling contaminated droplets, animal bite or bite from any insect carrying the pathogen. Different pathogens use different mechanisms for the transmission of disease.

Complete step-by-step solution:-
Cholera is an infectious disease caused by gram-negative, comma-shaped bacteria named Vibrio cholerae. The person gets the disease or infection via consuming food or drinking water that is contaminated with the bacteria. Common sources include Municipal water supply, food from roadside vendors, Raw or uncooked seafood from the contaminated or polluted water.
When a person gets the infection through contaminated food or water, the bacteria releases toxin which affects the intestinal villi leading to severe diarrhea that is referred to as rice-water stool. This enormous loss of water from the body can lead to severe dehydration. The symptoms include Diarrhea, Vomiting, Increased heart rate, low blood pressure, Dry mouth, Thirst, Muscle Cramps. In severe conditions, dehydration can lead to shock and even death.
As this is water and foodborne disease and spreads through contaminated food and water, there will be no effect on controlling the mosquito population. Drying up of all ponds doesn't have any significant effect on Cholera because there are many other sources of contaminated water and drying up of ponds will only affect Aquatic life. Cholera doesn't spread from direct contact. So the correct answer is Option (C) Educating people to drink boiled water and not to eat exposed food.

Note:-
Controlling the mosquito population is an essential preventive measure for mosquito-borne disease like Malaria, Dengue, and Chikungunya. Dengue mosquito (Aedes) larva grows in clean, stagnant water, so drying up the pond or preventing water from being collected will prevent Dengue. Diseases that spread through inhalation of droplets from cough or sneeze of an infected person include Flu, Strep throat, etc and these can be prevented by avoiding contact with the diseased or infected person.