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

Which of the following is not a cause of polycythaemia?

  1. Mutation of JAK 2

  2. Renal failure

  3. Congenital heart disease

  4. Haemoglobin abnormality

  5. Iron overload
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Iron overload is an excess of iron in the body. Excess iron in vital organs, even in mild cases of iron overload, increases the risk for liver disease like cirrhosis, cancer , heart attack or heart failure, diabetes mellitus etc, but it is not a cause of polycythaemia.

Multiple choice

Hydrophobia occurs during

  1. tetanus

  2. rabies

  3. polio

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

Rabies is a viral disease that causes acute inflammation of the brain in humans and other warm-blooded animals. Early symptoms can include fever and tingling at the site of exposure. These symptoms are followed by one or more of the following symptoms: violent movements, uncontrolled excitement, fear of water (hydrophobia), an inability to move parts of the body, confusion and loss of consciousness.

Multiple choice

Which of the following factors can cause diseases?

a. Environmental factors b. Specific infective agents c. Inherent defects of the organism

  1. Only a

  2. Only a and b

  3. Only b and c

  4. Only b

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

This is the correct option as a disease is a response to environmental factors such as malnutrition, industrial hazards or climate, specific infective agents like worms, protozoans, fungi, bacteria or viruses and inherent defects of the organism such as genetic anomalies. This is a wrong option as environmental factors such as malnutrition, industrial hazards or climate and inherent defects of the organism such as genetic anomalies are also involved.

Multiple choice

Which of the following is a characteristic of communicable diseases?

  1. Community hygiene is ineffective in reducing the incidence of these diseases.

  2. They are caused by the attack of pathogens.

  3. These diseases are caused by internal factors.

  4. Transmission of these diseases does not occur.

  5. They occur due to the deficiency of nutrients in the diet.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option as this is a characteristic of communicable diseases.

Multiple choice

Which of the following is not a causative agent of diarrhoea?

  1. Escherichia coli

  2. Entamoeba

  3. Rotavirus

  4. Ascaris

  5. Salmonella

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as salmonella causes typhoid. Ascariasis is an infection of the small intestine caused by Ascaris lumbricoides (A. lumbricoides), which is a species of roundworm.