Biology ยท Science General

Disease Causative Agents

2,531 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

'Measles' is

  1. a non-infectious disease

  2. an infectious disease

  3. a respiratory disease

  4. a helminthic disease
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

2

Multiple choice

In humans which one of the following causes tetanus?

  1. Bacteria

  2. Fungus

  3. Protozoan

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

Tetanus is caused by the bacterium Clostridium tetani, which produces a powerful neurotoxin. The bacteria typically enter the body through wounds, cuts, or puncture injuries, especially from contaminated objects like rusty nails. Fungi, protozoa, and viruses cause other diseases but not tetanus.

Multiple choice

Tuberculosis is caused by

  1. bacteria

  2. virus

  3. protozoa

  4. fungus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tuberculosis (TB) is an infectious disease caused by the bacterium Mycobacterium tuberculosis. It primarily affects the lungs but can spread to other parts of the body. It is not caused by viruses, protozoa, or fungi.

Multiple choice

Typhoid spreads through

  1. infected water

  2. infected food

  3. Both (1) and (2)

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Typhoid fever is caused by Salmonella Typhi bacteria and spreads through the fecal-oral route. Contaminated water and food are the primary transmission modes. The bacteria enter the digestive system when a person consumes contaminated food or water.

Multiple choice

Anthrax is an infectious disease that affects

  1. Humans

  2. Plants

  3. Farm animals

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

Anthrax is primarily known as a disease affecting livestock and farm animals such as cattle, sheep, and goats. While it can infect humans (usually through contact with infected animals or their products), the disease is most strongly associated with farm animals in agricultural and veterinary contexts. The question focuses on its primary impact.

Multiple choice

What is Zoonosis?

  1. A small zoo

  2. Animal disease that can be transmitted to man

  3. A type of camera

  4. A type of rock
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Zoonosis refers to infectious diseases that can be transmitted from animals to humans. Examples include rabies, avian influenza, and salmonella. These diseases can spread through direct contact with animals, consumption of contaminated animal products, or vectors like ticks and mosquitoes that carry pathogens from animals to humans.