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

STDs caused by bacteria or parasites can be treated with antibiotics or other medicines but STDs caused by viruses cannot be cured. Which of the following STDs is/are caused by viruses?

  1. Chlamydia

  2. Syphilis

  3. Gonorrhea

  4. Herpes

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer as herpes is caused by herpes simplex virus. There is no cure for this. Once a person has the virus, it remains in the body. The virus lies inactive in the nerve cells until something triggers it to become active again.

Multiple choice

Which of the following is/are correct about tuberculosis?

a. It is caused by Salmonella. b. It commonly affects lungs. c. Bacteria release tuberculin toxin. d. Patient's sputum contains blood.

  1. a, b, c and d

  2. a, b and c

  3. a, c and d

  4. a, b and d

  5. b, c and d
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct answer as all these statements about tuberculosis are correct. It commonly affects lungs. Bacteria release tuberculin toxin. Patient's sputum contains blood.

Multiple choice

All of the following cause poultry diseases, except

  1. bacteria

  2. algae

  3. fungi

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

Reason: There are a number of diseases prevalent in poultry. The diseases are caused by organisms like virus, bacteria, fungi, parasites as well as other nutritional deficiencies (i.e. lack of some important component in the feed given to them; may be proteins, carbohydrates, fats, vitamins or minerals). Algae are a group of simple autotrophic organisms (auto - self; trophic - nutrition, i.e. they make their own food from CO2 + H2O in the presence of sunlight and chlorophyll). These autotrophic organisms do not cause any disease in the poultry fowl.

Multiple choice

Smoking can cause

  1. Malaria

  2. Influenja

  3. Typhoid

  4. Bronchitis

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

smoking caused the respiratory infections like bronchitis and allergies.

Multiple choice

Which of the following describes the word pathogen?

  1. It a protein made by white blood cells that can help destroy microbes

  2. which kills, or prevents the growth of bacteria in the body

  3. It is the result of a micro-organism entering the body and causing disease

  4. It is a micro-organism that can cause a disease

  5. which kills, or prevents the growth of bacteria on external parts of the body
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A micro organism that can cause a disease is know as pathogen.

Multiple choice

A boy is suffering from blue-baby syndrome due to the formation of non-functional methaemoglobin. Which of the following is responsible for this?

  1. Excess of arsenic concentration in drinking water.

  2. Excess of nitrates in drinking water.

  3. Deficiency of iron in food.

  4. Increased methane content in the atmosphere.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The environmental Protection Agency (EPA) has set the Maximum Contamination Level (MCL) of nitrates for the safety of drinking water. Nitrate levels at or above this level have been known to cause a potentially fatal blood disorder in, infants under six months of age called methaemoglobinemia or blue-baby syndrome, in which there is a reduction in the oxygen carrying capacity of blood.

Multiple choice

Which of the following diseases is caused by prions?

  1. Severe acute respiratory syndrome

  2. West Nile encephalitis

  3. Mad cow disease

  4. Dengue hemorrhagic fever

  5. Ebola hemorrhagic fever
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mad cow disease is an infectious disease caused by prions that affect the brains of cattle.

Multiple choice

Which of the following is a pair of protozoan diseases?

  1. Chagas’ disease and malaria

  2. Ebola haemorrhagic fever and dengue haemorrhagic fever

  3. Typhoid fever and yellow fever

  4. Cholera and diphtheria

  5. Bubonic plague and rabies
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chagas’ disease is caused by Trypanosoma cruzi (protozoan). Malaria is caused by Plasmodium falciparum (protozoan).