Biology ยท 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

Acne is caused by the bacteria ________.

  1. Staphylococci

  2. Helicobacter pylori

  3. Trypanasoma

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

Acne is commonly associated with the bacteria Propionibacterium acnes, but in many textbooks, Staphylococci are also cited as skin-dwelling bacteria that can contribute to infections.

Multiple choice

Kalaazar is caused by

  1. Bacteria

  2. Virus

  3. Worms

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Kala-azar (visceral leishmaniasis) is caused by a protozoan parasite of the genus Leishmania, which is not a bacteria, virus, or worm.

Multiple choice

What is common to chloera, amoebiasis, polio, hepatitis and typhoid?

  1. All are water- borne diseases

  2. All are non-communicable

  3. All are bacterial diseases

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

All these diseases spread through contaminated water or food. While they differ in causative agents (cholera and typhoid are bacterial, polio and hepatitis are viral, amoebiasis is protozoan), they share the water-borne transmission route, making water contamination a key prevention target.

Multiple choice

Which of the following is a viral disease?

  1. Tetanus

  2. Chloera

  3. Typhoid

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

Rabies is the only viral disease in this list, caused by the rabies virus. Tetanus is caused by the bacterium Clostridium tetani, cholera by Vibrio cholerae, and typhoid by Salmonella typhi. All three others are bacterial diseases.

Multiple choice

Which of the following is an autoimmune disease?

  1. Cholera

  2. Rheumatic fever

  3. Typhoid fever

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

Rheumatic fever is an autoimmune disease resulting from an abnormal immune response to a streptococcal infection. Cholera, Typhoid, and Malaria are infectious diseases caused by pathogens.

Multiple choice

The first level of cause of disease is

  1. inadequate diet

  2. drinking unclean water

  3. medicines

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In public health, the primary cause of many diseases is the lack of basic sanitation, such as access to clean water. Drinking unclean water is a fundamental cause of waterborne diseases.

Multiple choice

Tetanus is a ________ disease.

  1. bacterial

  2. viral

  3. fungal

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

Tetanus is caused by the bacterium Clostridium tetani, which produces a toxin that affects the nervous system.

Multiple choice

Whooping cough is a fungal disease.

  1. Correct

  2. Not correct

  3. No, it is a viral disease.

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Whooping cough (pertussis) is a bacterial infection caused by the bacterium Bordetella pertussis, not a fungal disease.

Multiple choice

___________ is the third level of cause of disease.

  1. Inadequate food

  2. Unclean water

  3. Lack of public service

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In public health models, the first level of disease cause is often the pathogen, the second is individual health, and the third level relates to broader socio-economic factors like lack of public services.

Multiple choice

Disease is caused in

  1. human

  2. animals

  3. plants

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Disease is a broad term that applies to any impairment of normal physiological function, which can affect humans, animals, and plants.

Multiple choice

Botulism is a disease can be caused by

  1. water

  2. canned food

  3. mosquito bite

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

Botulism is a rare but serious illness caused by a toxin produced by the bacterium Clostridium botulinum, which often thrives in improperly canned or preserved food.