Biology ยท 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

Which among the following diseases is also known as rabbit fever?

  1. Tularemia

  2. Hemolytic-uremic syndrome

  3. Traveler's diarrhoea

  4. Urinary tract infection
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tularemia is also known as rabbit fever. It is a serious infectious disease caused by the bacterium Francisella tularensis. A Gram-negative, nonmotile coccobacillus, the bacterium has several subspecies with varying degrees of virulence.

Multiple choice

Directions: Choose the correct answer from the options given below:

The causative organism of the bird flu is?

  1. H5 N1 virus

  2. H4 N 4 virus

  3. H6 N8 virus

  4. H9 N7 virus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

H5N1 (Influenza A virus subtype H5N1) is the specific viral strain responsible for avian influenza or bird flu. This subtype is highly pathogenic and can transmit from birds to humans. The other combinations mentioned (H4N4, H6N8, H9N7) are not the causative agents of bird flu.

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.