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

The term 'zoonosis' refers to:

  1. Diseases that are transmitted from animals to humans

  2. Diseases that are transmitted from humans to animals

  3. Diseases that are caused by bacteria

  4. Diseases that are caused by viruses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Zoonoses are diseases that can be transmitted from animals to humans, often through direct contact or consumption of contaminated animal products.

Multiple choice

Which of the following is an example of a disease that has been significantly influenced by human migration patterns?

  1. Smallpox

  2. Yellow Fever

  3. Bubonic Plague

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

Measles has been significantly influenced by human migration patterns, as it is highly contagious and can spread rapidly through unvaccinated populations.

Multiple choice

The concept of 'disease reservoirs' refers to:

  1. Geographic areas where diseases are persistently present

  2. Animal populations that carry and transmit diseases to humans

  3. Environmental factors that contribute to the spread of diseases

  4. Populations with high levels of immunity to a particular disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Disease reservoirs are geographic areas where diseases are continuously present, often due to environmental factors or the presence of animal hosts.

Multiple choice

Which of the following diseases is primarily transmitted through airborne droplets?

  1. Ebola

  2. Hepatitis B

  3. Influenza

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

Influenza is primarily transmitted through airborne droplets produced by coughing, sneezing, or talking.

Multiple choice

The term 'pandemic' refers to:

  1. A disease outbreak that affects a large geographic area

  2. A disease outbreak that is rapidly spreading and causing high mortality

  3. A disease outbreak that is caused by a new and highly virulent pathogen

  4. A disease outbreak that is resistant to existing treatments and vaccines
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A pandemic is a disease outbreak that spreads across a large geographic area, typically affecting multiple countries or continents.

Multiple choice

Which of the following diseases is primarily transmitted through contact with contaminated soil?

  1. Tetanus

  2. Hepatitis A

  3. Malaria

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

Tetanus is primarily transmitted through contact with contaminated soil or objects, as the bacteria that causes it lives in soil and dust.

Multiple choice

What is the most common type of foodborne illness?

  1. Salmonella

  2. E. coli

  3. Listeria

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

Salmonella is the most common type of foodborne illness, accounting for over 1 million cases in the United States each year.

Multiple choice

Which of the following is NOT a type of foodborne illness?

  1. Salmonella

  2. E. coli

  3. Influenza

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

Influenza is a respiratory illness caused by a virus. It is not a foodborne illness.

Multiple choice

Which of the following is a common food safety concern associated with poultry products?

  1. Salmonella contamination

  2. Campylobacter contamination

  3. E. coli contamination

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

Salmonella, Campylobacter, and E. coli are all common food safety concerns associated with poultry products. These bacteria can cause foodborne illness if poultry products are not properly handled, cooked, and stored.

Multiple choice

What is the most common cause of pharyngitis?

  1. Bacterial infection

  2. Viral infection

  3. Fungal infection

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

Viral infections, particularly those caused by adenoviruses and rhinoviruses, are the most common cause of pharyngitis.

Multiple choice

Which bacteria is responsible for causing streptococcal pharyngitis?

  1. Streptococcus pyogenes

  2. Streptococcus pneumoniae

  3. Streptococcus agalactiae

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

Streptococcus pyogenes, also known as Group A Streptococcus (GAS), is the primary cause of streptococcal pharyngitis.

Multiple choice

Which of the following is a potential complication of untreated streptococcal pharyngitis?

  1. Rheumatic fever

  2. Kidney inflammation

  3. Pneumonia

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

Rheumatic fever is a potential complication of untreated streptococcal pharyngitis, leading to inflammation of the heart, joints, and brain.

Multiple choice

Which of the following is NOT a common type of disease monitoring system?

  1. Syndromic surveillance system

  2. Laboratory-based surveillance system

  3. Sentinel surveillance system

  4. Population-based surveillance system
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Syndromic surveillance system is not a common type of disease monitoring system. It is a type of surveillance that monitors data on non-specific symptoms or syndromes, rather than specific diseases.

Multiple choice

What discovery led to the spread of deadly diseases in the 19th century?

  1. Germ theory of disease

  2. Vaccination

  3. Antibiotics

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

The discovery of the germ theory of disease led to the understanding that diseases are caused by microorganisms, but it also led to the spread of deadly diseases due to lack of proper hygiene and sanitation.

Multiple choice

Which of the following is a common waterborne disease associated with urbanization?

  1. Cholera

  2. Typhoid

  3. Dysentery

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

Cholera, typhoid, and dysentery are all common waterborne diseases associated with urbanization.