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 respiratory disease is caused by a bacterial infection that primarily affects the lungs and can spread to other parts of the body?

  1. Asthma

  2. Pneumonia

  3. Emphysema

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

Tuberculosis is a bacterial infection that primarily affects the lungs but can spread to other parts of the body, causing a range of symptoms.

Multiple choice

Which communicable disease is a major cause of disability in India?

  1. Tuberculosis

  2. HIV/AIDS

  3. Malaria

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

Tuberculosis, HIV/AIDS, and malaria are all major communicable diseases that can cause disability in India.

Multiple choice

What is the leading cause of death from unsafe water, sanitation, and hygiene?

  1. Diarrhea

  2. Malaria

  3. HIV/AIDS

  4. Tuberculosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Diarrhea is the leading cause of death from unsafe water, sanitation, and hygiene, accounting for an estimated 437,000 deaths annually.

Multiple choice

Which of the following is NOT a type of waterborne disease?

  1. Cholera

  2. Typhoid fever

  3. Hepatitis A

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

Influenza is not a waterborne disease, as it is spread through respiratory droplets.

Multiple choice

Which of the following is a common cause of traveler's diarrhea?

  1. Escherichia coli

  2. Salmonella

  3. Shigella

  4. Campylobacter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Escherichia coli is a common cause of traveler's diarrhea, especially in developing countries.

Multiple choice

What is the most common cause of food poisoning in the United States?

  1. Salmonella

  2. Clostridium perfringens

  3. Staphylococcus aureus

  4. Escherichia coli
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salmonella is the most common cause of food poisoning in the United States, causing an estimated 1 million cases of illness each year.

Multiple choice

What is the most common cause of infectious diarrhea in children under 5 years old?

  1. Rotavirus

  2. Shigella

  3. Salmonella

  4. Campylobacter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rotavirus is the most common cause of infectious diarrhea in children under 5 years old, causing an estimated 2 million deaths each year.

Multiple choice

What is the most common cause of amebiasis?

  1. Entamoeba histolytica

  2. Entamoeba dispar

  3. Entamoeba moshkovskii

  4. Entamoeba coli
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Entamoeba histolytica is the most common cause of amebiasis, a parasitic infection of the intestines.

Multiple choice

What is the most common cause of bacterial dysentery?

  1. Shigella

  2. Salmonella

  3. Campylobacter

  4. Escherichia coli
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Shigella is the most common cause of bacterial dysentery, a severe form of diarrhea characterized by bloody stools.

Multiple choice

What is the most common cause of traveler's diarrhea in developing countries?

  1. Escherichia coli

  2. Salmonella

  3. Shigella

  4. Campylobacter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Escherichia coli is the most common cause of traveler's diarrhea in developing countries, especially in areas with poor sanitation and hygiene.

Multiple choice

What is the most common cause of food poisoning in the United States?

  1. Salmonella

  2. Clostridium perfringens

  3. Staphylococcus aureus

  4. Escherichia coli
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salmonella is the most common cause of food poisoning in the United States, causing an estimated 1 million cases of illness each year.

Multiple choice

What is the most common cause of infectious diarrhea in children under 5 years old?

  1. Rotavirus

  2. Shigella

  3. Salmonella

  4. Campylobacter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rotavirus is the most common cause of infectious diarrhea in children under 5 years old, causing an estimated 2 million deaths each year.

Multiple choice

What is the most common cause of acute otitis media (middle ear infection)?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Bacteria, such as Streptococcus pneumoniae and Haemophilus influenzae, are the most common cause of acute otitis media. Viruses and fungi can also cause middle ear infections, but they are less common.

Multiple choice

Which enzyme is responsible for the production of reactive oxygen species (ROS) in neutrophils?

  1. Myeloperoxidase (MPO)

  2. NADPH oxidase

  3. Catalase

  4. Superoxide dismutase (SOD)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

NADPH oxidase is the enzyme responsible for the production of reactive oxygen species (ROS) in neutrophils. It is activated during phagocytosis and generates superoxide anions, which are subsequently converted into other ROS, including hydrogen peroxide and hypochlorous acid.

Multiple choice

What is the most common cause of prostatitis?

  1. Bacterial infection

  2. Viral infection

  3. Fungal infection

  4. Parasite infection
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bacterial infection is the most common cause of prostatitis. The bacteria can enter the prostate gland through the urethra, the tube that carries urine out of the body.