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

Which of the following diseases is not a bacterial infection?

  1. Pneumonia

  2. Leprosy

  3. Typhoid

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

Herpes Zoster (shingles) is caused by the varicella-zoster virus, making it a viral infection. Pneumonia is commonly bacterial (though can be viral), Leprosy is caused by Mycobacterium leprae (bacterial), and Typhoid is caused by Salmonella Typhi (bacterial).

Multiple choice

The human disease, syphilis is caused by :

  1. bacteria

  2. virus

  3. fungus

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

Syphilis is caused by the bacterium Treponema pallidum, a spirochete that is transmitted through sexual contact or vertical transmission from mother to fetus. Unlike viral STDs, bacterial infections like syphilis can be treated effectively with antibiotics such as penicillin.

Multiple choice

_________ is also called 'slim disease'.

  1. Typhoid

  2. Polio

  3. AIDS

  4. Influenza

  5. Hepatitis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. AIDS is a disease in which there is a severe loss of the body's weight, swollen lymph nodes, etc. Thus, it is also called 'slim disease'. 

Multiple choice

By which one of the following scrub typhus is transmitted?

  1. Reduvid bug

  2. Trombiculid mite

  3. Enteric pathogens

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

Scrub typhus is caused by Orientia tsutsugamushi and transmitted by the larval stage of trombiculid mites (chiggers). Reduvid bugs transmit Chagas disease, cyclops transmit guinea worm disease, and enteric pathogens cause various bacterial infections.