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

Infective endocarditis is caused by

  1. Streptococcus Viridant

  2. Meningococcal

  3. Pneumococcal

  4. Leishmania donovani

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Streptococcus viridans (specifically viridans group streptococci) is the most common cause of infective endocarditis, particularly in previously damaged heart valves. Meningococcal and pneumococcal cause other infections. Leishmania causes kala-azar.

Multiple choice

The common cause of the vaginal discharge is

  1. Entamoeba histolytica

  2. Treponema palladium

  3. Polio virus

  4. Trichomonas vaginalis

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Trichomonas vaginalis is a common protozoan parasite that causes trichomoniasis, a frequent cause of vaginal discharge. Treponema pallidum causes syphilis, and Entamoeba histolytica causes amoebiasis.

Multiple choice

The oldest known disease in the world is

  1. leprosy

  2. breast cancer

  3. lung cancer

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

Leprosy (Hansen's disease) is widely cited in medical history as one of the oldest known diseases, with evidence of its existence dating back to ancient civilizations.

Multiple choice

Which of the following is correct pair of disease and its causing agent?

  1. Food poisoning-Brevibacillus brevis

  2. Gonorrhoea-Entamoeba

  3. Syphilis-Treponema pallidum

  4. Urethritis-Bacillus anthracis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Syphilis is a sexually transmitted disease caused by Treponema pallidum. The incubation period of this pathogen varies form 10 to 90 days (average one month). 

Multiple choice

Tetanus is caused by

  1. Fungus

  2. Virus

  3. Bacteria

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

Tetanus is a serious bacterial infection caused by Clostridium tetani. The bacteria produce a toxin that affects the nervous system.

Multiple choice

Water borne disease is

  1. Diabetes

  2. Cancer

  3. Appendicitis

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

Cholera occur due to Vibrio cholerae.

Multiple choice

Smoking is linked to

  1. Cancer

  2. Hepatitis

  3. Typhoid

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

Smoking causes lung cancer.