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 waterborne disease is caused by the bacteria Escherichia coli (E. coli)?

  1. E. coli infection

  2. Cholera

  3. Typhoid

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

E. coli infection is a diarrheal disease caused by the bacteria Escherichia coli (E. coli) and is transmitted through contaminated water or food.

Multiple choice

What was a common method of disease transmission in classical civilizations?

  1. Contact with contaminated water

  2. Consumption of spoiled food

  3. Insect bites

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

Diseases could be transmitted through various routes in classical civilizations. Contact with contaminated water sources, consumption of spoiled food, and insect bites were common modes of transmission. These factors contributed to the spread of illnesses, particularly in densely populated areas.

Multiple choice

What was a major factor contributing to the spread of diseases during warfare in classical times?

  1. Movement of troops

  2. Poor sanitation in military camps

  3. Contact with infected populations

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

During warfare in classical times, the movement of troops, poor sanitation in military camps, and contact with infected populations all contributed to the spread of diseases. Soldiers often traveled long distances, carrying pathogens with them, and unsanitary conditions in camps provided favorable environments for the transmission of illnesses.

Multiple choice

What was a major factor contributing to the spread of diseases in densely populated urban centers in classical times?

  1. Poor sanitation

  2. Overcrowding

  3. Lack of access to clean water

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

Densely populated urban centers in classical times often faced challenges with sanitation, overcrowding, and lack of access to clean water. These conditions created favorable environments for the spread of diseases, as pathogens could easily be transmitted through contaminated water, close contact, and unsanitary living conditions.

Multiple choice

Which of the following is a common cause of thrush in infants?

  1. Candida albicans

  2. Streptococcus mutans

  3. Lactobacillus acidophilus

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

Thrush in infants is commonly caused by the fungus Candida albicans.

Multiple choice

What is the primary mode of transmission of thrush in infants?

  1. Contact with an infected person

  2. Ingestion of contaminated food or water

  3. Inhalation of fungal spores

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

Thrush in infants is primarily transmitted through contact with an infected person, such as a caregiver or another child.

Multiple choice

What is the most common sexually transmitted disease (STD) in the world?

  1. Chlamydia

  2. Gonorrhea

  3. Syphilis

  4. HIV/AIDS
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chlamydia is the most common STD in the world, with an estimated 131 million new cases each year.

Multiple choice

What is the most common cause of deafness in children worldwide?

  1. Otitis media

  2. Meningitis

  3. Measles

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

Otitis media is the most common cause of deafness in children worldwide, accounting for an estimated 31 million new cases each year.

Multiple choice

What was the name of the disease that the Europeans brought to the Americas?

  1. Smallpox

  2. Measles

  3. Typhus

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

Smallpox, measles, and typhus were all diseases that the Europeans brought to the Americas.

Multiple choice

Which of the following is NOT a disease of the throat?

  1. Strep throat

  2. Tonsillitis

  3. Laryngitis

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

Pneumonia is a disease of the lungs, not the throat.

Multiple choice

What is the primary cause of blepharitis?

  1. Bacterial Infection

  2. Viral Infection

  3. Seborrheic Dermatitis

  4. Allergies
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Seborrheic dermatitis, a skin condition characterized by red, scaly patches, is the most common cause of blepharitis.

Multiple choice

What is the primary cause of infectious scleritis?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Infectious scleritis is primarily caused by bacteria, with Staphylococcus aureus being the most common culprit.

Multiple choice

What is the most common cause of neonatal sepsis?

  1. Group B Streptococcus

  2. Escherichia coli

  3. Staphylococcus aureus

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

Group B Streptococcus (GBS) is the most common cause of neonatal sepsis, accounting for approximately 50% of cases.

Multiple choice

What is the most common complication of neonatal sepsis?

  1. Meningitis

  2. Pneumonia

  3. Necrotizing enterocolitis

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

Meningitis is the most common complication of neonatal sepsis.

Multiple choice

What is the most common pathogen causing neonatal sepsis in developing countries?

  1. Escherichia coli

  2. Klebsiella pneumoniae

  3. Pseudomonas aeruginosa

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

Escherichia coli is the most common pathogen causing neonatal sepsis in developing countries.