Biology · 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

Which of the following diseases is caused by prions?

  1. Severe acute respiratory syndrome

  2. West Nile encephalitis

  3. Mad cow disease

  4. Dengue hemorrhagic fever

  5. Ebola hemorrhagic fever
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mad cow disease is an infectious disease caused by prions that affect the brains of cattle.

Multiple choice

Nosocomial diseases are

  1. transmitted by air and usually inhaled

  2. transmitted through contact with infected blood

  3. ingested with food

  4. transmitted during stay in a hospital

  5. ingested with drinking or recreational waters
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nosocomial diseases are transmitted during stay in a hospital.

Multiple choice

The tuberculin skin test is an example of _____.

  1. type IV delayed hypersensitivity

  2. allergy reaction

  3. serum sickness

  4. precipitation reaction

  5. agglutination reaction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Type IV delayed hypersensitivity. The tuberculin skin test (TST) is an example of type IV hypersensitivity. The test is done by injecting small amount of tuberculin purified protein derivative (PPD) under the top layer of skin. The response in Mycobacterium tuberculosis exposed individual begins within 8 hours  and a reddened area surrounds the injection site becomes indurate (firm and hard) within 12-24 hrs.  The TH1 cell that migrates to the injection site is responsible for the indurations.