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 of the following is a pair of protozoan diseases?

  1. Ascariasis and Mucormycosis

  2. Ascariasis and Leishmaniasis

  3. Leishmaniasis and Mucormycosis

  4. Mucormycosis and Toxoplasmosis

  5. Leishmaniasis and Toxoplasmosis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Leishmaniasis is a disease caused by an intracellular protozoan parasite of genus Leishmania and transmitted by the bite of a sandfly. Toxoplasmosis is a parasitic disease caused by the protozoan Toxoplasma gondii.

Multiple choice

Which of the following diseases is caused by non-enveloped virus?

  1. Hepatitis A

  2. Hepatitis B

  3. Ebola

  4. Yellow fever

  5. Dengue fever
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hepatitis A is an acute infectious disease of the liver caused by the hepatitis A virus. Hepatitis A is a non-enveloped virus and contains a single-stranded RNA packaged in a protein shell.

Multiple choice

Which bacterium causes rabbit fever?

  1. Borrelia recurrentis

  2. Borrelia burgdorferi

  3. Francisella tularensis

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

Rabbit fever is caused by a gram negative bacilli called Francisella tularensis.

Multiple choice

Which of the following statements about rheumatic fever is true?

  1. It is a complication of beta-haemolytic streptococcal infection.

  2. It only affects the elderly.

  3. It complicates 3% of acute sore throats.

  4. It shows no evidence of genetic susceptibility.

  5. It is caused by immediate hypersensitivity to streptococci.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

About 50% of patients have an identifiable sore throat or skin infection 1-5 weeks prior to systemic illness.

Multiple choice

Which of the following statements regarding the cytokine profile of various diseases is true?

  1. Cutaneous leishmaniasis is associated with a predominant Th2 profile.

  2. Visceral leishmaniasis is associated with a good Th1 response.

  3. Tuberculoid leprosy is associated with a predominant Th2 profile.

  4. Lepromatous leprosy is associated with a predominant Th1 profile.

  5. Widespread disease in patients with Mycobacteria tuberculosis infection (miliary tuberculosis) is associated with a Th2 response.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Only a small proportion of infected individuals develop overt disease.