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Home Questions 5RTZ5XB5F9
Target Exam

CUET

Subject

Biology

Chapter

Human Health and Disease

Question:

Maintenance of personal and public hygiene is very important for prevention and control of many infectious diseases. Measures for personal hygiene include keeping the body clean; consumption of clean drinking water, food, vegetables, fruits, etc. Public hygiene includes proper disposal of waste and excreta; periodic cleaning and disinfection of water reservoirs, pools, cesspools and tanks and observing standard practices of hygiene in public catering. These measures are particularly essential where the infectious agents are transmitted through food and water such as typhoid, amoebiasis and ascariasis.The advancements made in biological science have armed us to effectively deal with many infectious diseases. The use of vaccines and immunisation programmes have enabled us to completely eradicate a deadly disease.

Which among the following measure is used to control or eliminate the vectors ?

Options:

Avoiding stagnation of water in and around residential areas.

Use of mosquito nets.

Introduction of Gambusia fish in ponds.

All of these .

Correct Answer:

All of these .

Explanation:

All of the mentioned measures can contribute to controlling or eliminating vectors, which are organisms that can transmit diseases from one host to another. Here's an explanation for each:

  1. Avoiding stagnation of water in and around residential areas: Stagnant water serves as a breeding ground for various disease-carrying vectors such as mosquitoes. Preventing water stagnation helps in reducing the breeding sites for these vectors.

  2. Use of mosquito nets: Mosquito nets act as a physical barrier and are an effective way to protect individuals from mosquito bites, thereby reducing the risk of mosquito-borne diseases like malaria, dengue, and Zika virus.

  3. Introduction of Gambusia fish in ponds: Gambusia fish, also known as mosquito fish, are voracious consumers of mosquito larvae. Introducing these fish into ponds or water bodies can help control mosquito populations by feeding on their larvae, hence reducing their numbers.

Therefore, "All of these" measures—avoiding stagnant water, using mosquito nets, and introducing Gambusia fish—are useful in controlling or eliminating vectors and reducing the spread of vector-borne diseases.

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