Biology · Science General

Disease Causative Agents

2,258 Questions

Disease causative agents questions test your understanding of viral, bacterial, and fungal infections, along with their transmission methods. These are common topics in general science sections of SSC and railways exams. Practice these questions to accurately identify disease pathogens and symptoms.

Viral diseasesFoodborne illnessesDisease transmission methodsExtrinsic disease factorsCommon pathogens

Disease Causative Agents Questions

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

How non-infectious disease is wrongly compared to chronic disease ?

  1. Because chronic disease are only infectious

  2. Non-infectious disease does not cause death

  3. Duration is not always long in non-infectious disease

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sometimes, NCDs result in rapid deaths as seen in certain diseases such as heart diseases, stroke, cancers etc. NCDs are distinguished only by their non-infectious cause, and not necessarily by their duration. Therefore, (c) is the correct answer.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which of the following are infectious and noninfectious diseases respectively?

  1. Typhoid and AIDS

  2. AIDS and cancer

  3. Pneumonia and malaria

  4. Cancer and arthritis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. AIDS which is caused by HIV is an infectious disease.

Noninfectious or intrinsic, diseases are neither contagious nor communicable. They arise from inside the body as a result of hereditary conditions or other causes, such as dietary deficiencies. Cancer is an example of non-infectious disease. Thus, the correct answer is option B.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which of the following term is used for the disease which spread from one person to another?

  1. Chronic

  2. Communicable

  3. Acquired

  4. Non communicable
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Communicable diseases are those that can be transmitted from an infected person or animal to another individual. Chronic diseases are long-lasting conditions, while non-communicable diseases are not spread through contact.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

It is safest to visit a friend hospitalised for the disease of

  1. Mumps

  2. Measles

  3. Tuberculosis

  4. Hepatitis

  5. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hepatitis (specifically types A and E) is typically transmitted through contaminated food or water, making it safer to visit a patient compared to diseases like Tuberculosis, Measles, or Mumps, which are highly contagious via respiratory droplets.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

The IPN (Infectious Pancreatic Necrosis) and VMS (Viral Haemorrhagic Septicemia) are well known infectious diseases of

  1. Fish

  2. Cattle

  3. Poultry

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Viral diseases are severe infectious diseases which spread rapidly from one person to the other. Pancreatic necrosis (IPN) is a viral disease which occurs in salmon fish. It is mainly caused due to the premature killing of the cells in the living tissues.

Viral haemorrhagic septicemia (VHS) is a deadly infectious fish disease caused by the viral hemorrhagic septicemia virus. It afflicts over 50 species of freshwater and marine fish in several parts of the northern hemisphere.
Therefore, the correct answer is option A.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

What is an epidemic disease?

  1. A global outbreak of disease

  2. A disease that occurs suddenly and spreads rapidly to many people

  3. A disease that occurs only occasionally and at unpredictable intervals

  4. A disease with clinically distinct symptoms whose incidence has increased, particularly over

    the last two decades
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Explanation: An epidemic occurs when an infectious disease spreads rapidly among too many people.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

What is a communicable disease?

  1. It is a disease that can be spread to others and is contagious.

  2. It is a disease that cannot be spread and is caused by health habits and behaviours.

  3. It is a disease that is caused by bacteria in our environment.

  4. It is a disease that can be spread through food, animals, water, and the air.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Explanation: Communicable diseases are caused by pathogens passed from one human to another.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Foot and mouth disease is a highly contagious disease almost exclusive to cattle, sheep, swine, goats, and other cloven-hoofed animals. It is caused by a

  1. Fungi

  2. Bacteria

  3. Protozoa

  4. Virus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Foot-and-mouth disease or hoof-and-mouth disease is an infectious and sometimes fatal viral disease that affects cloven-hoofed animals, including domestic and wild bovine. The virus causes a high fever for two or three days, followed by blisters inside the mouth and on the feet that may rupture.

Therefore, the correct answer is option D.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

The following are all common communicable diseases except

  1. Strep Throat

  2. MRSA

  3. Skin Cancer

  4. Mononucleosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Explanation: Communicable diseases are caused by pathogens passed from one human to another. Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms. Whereas, most skin cancers are caused by exposure to the sun.