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

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

Cholera bacillus is a bacterial species that produces a soluble exotoxin and causes cholera in humans. Who among the following scientists is credited with the first production of live, but non-virulent forms of chicken cholera bacillus?

  1. Pasteur

  2. Salk

  3. Jenner

  4. Montague

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

A culture of chicken cholera bacillus accidentally left on bench during warm summer months lost much of its ability to cause disease, but could protect birds from the effects of fresh virulent bacillus. Pasteur also obtained similar results for anthrax and rabies.

Multiple choice

______________ is a viral disease.

  1. Pneumonia

  2. Leprosy

  3. Plague

  4. Influenza

  5. Amoebic dysentery
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Influenza – Viral disease; caused by orthomyxovirus (paramyxovirus).

Multiple choice

What is a “toxin”?

  1. It is basically a poison that harms an organism.

  2. It is a secretion from the salivary gland.

  3. Its a humoral factor in blood.

  4. It is an anticoagulant.

  5. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A toxin is basically a poison that harms an organism.

Multiple choice

What is germ theory?

  1. It states that a disease-causing microorganism should be present in animals infected by the disease and not in healthy animals.

  2. It states that a disease-causing microorganism should be present in healthy animals and not in infected animals.

  3. It states that a disease-causing microorganism should be destroyed.

  4. It states that a disease-causing microorganism cannot be destroyed.

  5. Both 2 and 4 are correct.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Germ theory states that a disease-causing microorganism should be present in animals infected by the disease and not in healthy animals.