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A person had snacks from a street vendor, also drank water. He was later diagnosed with an infection. What was the mode of transmission of the disease?

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Both (b) and (c)

  2. Contaminated water

  3. Contamination through the vendor if he is infected

  4. Coughing of the healthy person standing next to him

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Correct Option: A
Explanation:

Food prepared in unhygienic conditions can lead to diseases. Use of contaminated water, dirty utensils, not washing raw materials before cooking, inappropriate cooking practices are all source of contamination and can result in infection. Therefore, (a) is the correct answer.

Infectious agents are also known as _________

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Pathogens

  2. Transmitters

  3. Carriers

  4. All of the above

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Correct Option: A
Explanation:

Pathogen is the term used to describe an infectious agent that causes disease in the host. Therefore, (a) is the correct answer.

Which of the following are carriers of infectious agents ?

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Air

  2. Water

  3. Soil

  4. All of the above

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Correct Option: D
Explanation:

Air, water and soil are carriers of infectious organisms. Soil can cause contamination of plants and infect them and hence, the human. Air is the most common carriers of pathogens around us. Therefore, (d) is the correct answer.

How is infection transferred from one human to another ? 

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Coughing or sneezing

  2. Both A and C

  3. Through contaminated hands

  4. Through soil

Show answer
Correct Option: B
Explanation:

There are numerous ways through which infections can be transmitted. Coughing by the infected person can cause transfer as the organisms coming out are inhaled by the healthy person. No use of proper sanitization can also cause transmission of diseases. Therefore, (b) is the correct answer.

What is latent infection?

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Does not show signs and symptoms at first

  2. It can be treated at the earliest

  3. Shows signs and symptoms at the earliest

  4. Both B and C

Show answer
Correct Option: A
Explanation:

Latent infection is one which do not show any signs or symptoms at first but can naturally develop over time. Therefore, (a) is the correct answer.

Which of the following groups of the disease, the causative microorganism and disease symptom is/are true?

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Malaria - Protozoan - Fever and chill

  2. Hepatitis-B - Virus - Swollen liver

  3. Cholera - Bacteria - Vomiting and diarrhoea

  4. All of the above

Show answer
Correct Option: D
Explanation:
Malaria is a protozoan disease caused by Plasmodium. The symptoms are periodic chills and fever. 
Hepatitis is the condition in which the cells of the liver gets inflamed and swollen. This may be due to an infection by the hepatitis B virus.
Vibrio cholerae is the bacterium which is responsible for the disease, cholera. The symptoms of the disease are muscle cramps due to loss of electrolytes, diarrhoea, vomiting, dehydration, the passage of watery stools, etc.
Thus, the correct answer is option D. 

Match the following diseases in column-I with their pathogens in column-II.

Column-I Column-II
a. Measles 1. Protozoa
b. Cholera 2. Virus
c. Kalaazar 3. Bacteria
evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. a-1, b-3, c-2

  2. a-1, b-2, c-3

  3. a-2 ,b-1, c-3

  4. a-2, b-3, c-1

Show answer
Correct Option: D
Explanation:

Measles is caused by the type of paramyxovirus known as rubella virus.

Cholera is caused by the bacterium  Vibrio cholerae. 
Leishmaniasis or kala-azar is a common disease caused by protozoan Leishmania donovani.
Thus, the correct answer is option D. 

Hemorrhagic Septicaemia is also known as ___________.

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Pasturellosis

  2. Shipping fever

  3. Ghatsurp

  4. All of the above

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Correct Option: D
Explanation:

Explanation: It is an actual infectious disease of cattle, buffalo, sheep and goat. It distances transportation. In India, the disease is enzootic in nature. Etiology environmental conditions, malnutrition and long distance transportation. In India, the disease is enzootic in nature.

Diseases that spread by vectors, such as mosquitoes, are

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Encephalitis and Malaria.

  2. Syphilis and AIDS.

  3. Tuberculosis and Sleeping sickness.

  4. Kala-azar and SARS.

Show answer
Correct Option: A
Explanation:

Encephalitis is the disorder in which there is inflammation of the meninges of the brain. This disease may be caused due to bacterial or viral infection and is transmitted by the vector which is the Culex mosquito. Malaria is a disorder which is caused by the protozoan Plasmodium vivax. The disease is transmitted by the Anopheles mosquito. 

Thus, the correct answer is option A. 

Which disease is spread by Housefly?

evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

  1. Dengue fever

  2. Encephalitis

  3. Filariasis

  4. Gangrene.

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Correct Option: D
Explanation:

$\rightarrow $ Gangrene.


$\Rightarrow$ Gangrene is a term that described dead or dying tissue that occurs because the local blood supply is totally cut off or not in that sufficient way to keep the body tissue in alive way.