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

All of the following are air borne diseases except

  1. common cold

  2. pneumonia

  3. tuberculosis

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

Malaria is a vector-borne disease transmitted by the bite of an infected female Anopheles mosquito, not through the air. Common cold, pneumonia, and tuberculosis are all airborne.

Multiple choice

Which of the following diseases is caused by virus?

  1. Influenza

  2. Typhoid

  3. Cholera

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

Influenza is caused by the influenza virus. Typhoid and cholera are bacterial infections caused by Salmonella typhi and Vibrio cholerae, respectively.

Multiple choice

Congenital diseases are those which

  1. occur during life time

  2. occur at the time of birth

  3. are infectious and spread from man to man

  4. are deiciency diseases
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ans - 2

Multiple choice

Cholera is a/an

  1. Air-borne disease

  2. Water-borne disease

  3. Genetic disorder

  4. Sexually-transmitted disease
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ans - 2

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.