Biology ยท Science General

Disease Causative Agents

2,531 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 common sexually transmitted infection (STI)?

  1. Chlamydia

  2. Gonorrhea

  3. Syphilis

  4. Athlete's foot
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Athlete's foot is a fungal infection of the skin, not an STI.

Multiple choice

Which STI is caused by a spirochete and can lead to serious health problems if left untreated?

  1. Chlamydia

  2. Gonorrhea

  3. Syphilis

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

Syphilis is caused by the spirochete Treponema pallidum and can lead to serious health problems, including damage to the heart, brain, and nervous system, if left untreated.

Multiple choice

Which disease was responsible for the most deaths during the Black Death pandemic?

  1. Bubonic plague

  2. Pneumonic plague

  3. Septicemic plague

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

The Black Death pandemic was caused by all three forms of plague: bubonic, pneumonic, and septicemic.

Multiple choice

Which of the following is NOT a common disease associated with the monsoon season?

  1. Malaria

  2. Dengue

  3. Typhoid

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

Pneumonia is typically associated with cold weather, not the monsoon season.

Multiple choice

What is the most common cause of waterborne diseases during the monsoon season?

  1. Contaminated drinking water

  2. Flooding

  3. Sewage leaks

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

Contaminated drinking water is the most common cause of waterborne diseases during the monsoon season.

Multiple choice

Which of the following is NOT a common cause of airborne diseases during the monsoon season?

  1. Respiratory infections

  2. Influenza

  3. Tuberculosis

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

Measles is typically associated with close contact with an infected person, not the monsoon season.

Multiple choice

What is the most common cause of foodborne diseases during the monsoon season?

  1. Contaminated food

  2. Spoiled food

  3. Undercooked food

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

Contaminated food is the most common cause of foodborne diseases during the monsoon season.

Multiple choice

Which waterborne pathogen is commonly associated with contaminated drinking water and can cause severe gastrointestinal illness?

  1. E. coli

  2. Salmonella

  3. Giardia lamblia

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

Giardia lamblia is a protozoan parasite that can contaminate water sources and cause giardiasis, a common waterborne disease characterized by diarrhea, abdominal cramps, and nausea.

Multiple choice

Which waterborne disease is caused by a bacterium and can lead to severe diarrhea, vomiting, and dehydration?

  1. Cholera

  2. Typhoid Fever

  3. Dysentery

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

Cholera is an infectious disease caused by the bacterium Vibrio cholerae, transmitted through contaminated water or food. It is characterized by severe diarrhea, vomiting, and dehydration, and can be fatal if left untreated.

Multiple choice

Which disease is the leading cause of death among children under the age of 5?

  1. Pneumonia

  2. Diarrhea

  3. Malaria

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

Pneumonia is the leading cause of death among children under the age of 5, accounting for an estimated 1.4 million deaths each year.

Multiple choice

Which of the following diseases is NOT associated with habitat loss?

  1. Malaria

  2. Lyme disease

  3. Ebola

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

Influenza is a respiratory disease caused by a virus that primarily spreads through human-to-human contact. Unlike malaria, Lyme disease, and Ebola, it is not typically associated with habitat loss.

Multiple choice

What is the primary mode of transmission for leptospirosis?

  1. Contact with contaminated water or soil

  2. Animal bites

  3. Airborne transmission

  4. Direct contact with an infected person
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Leptospirosis is primarily transmitted through contact with contaminated water or soil, which can occur during floods or heavy rains.

Multiple choice

What is the most common type of infection seen in military personnel?

  1. Pneumonia

  2. Malaria

  3. Typhoid fever

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

Diarrhea is the most common type of infection seen in military personnel, accounting for approximately 20% of all infections.

Multiple choice

Which of the following is a common disease affecting coral reefs?

  1. Coral Bleaching

  2. Coral Cancer

  3. Coral AIDS

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

Coral bleaching is a phenomenon where corals lose their symbiotic algae, leading to a loss of color and increased susceptibility to disease and death.

Multiple choice

What is the name of the disease that affects salmon and trout, causing severe lesions and mortality?

  1. Salmon Poxvirus

  2. Salmon AIDS

  3. Salmon Flu

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

Salmon Poxvirus is a highly contagious disease that affects salmon and trout, causing severe lesions and mortality.