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 of the following is a bacterial disease that causes Johne's Disease in cattle?

  1. Mycobacterium avium subsp. paratuberculosis

  2. Salmonella

  3. Escherichia coli

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

Johne's Disease is caused by Mycobacterium avium subsp. paratuberculosis, a bacterium that affects cattle and other ruminants, leading to chronic inflammation and thickening of the intestinal wall.

Multiple choice

What is the primary mode of transmission for Avian Influenza?

  1. Contact

  2. Ingestion

  3. Airborne

  4. Vector-borne
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Avian Influenza is primarily transmitted through the inhalation of aerosolized droplets containing the virus, making it an airborne disease.

Multiple choice

Which of the following is a bacterial disease that causes Salmonellosis in poultry?

  1. Escherichia coli

  2. Salmonella

  3. Campylobacter

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

Salmonellosis in poultry is caused by Salmonella bacteria, which can lead to a range of symptoms, including diarrhea, lethargy, and decreased egg production.

Multiple choice

What is the most common type of mastitis in sheep and goats?

  1. Streptococcal Mastitis

  2. Staphylococcal Mastitis

  3. Coliform Mastitis

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

Staphylococcal Mastitis is the most prevalent type of mastitis in sheep and goats, caused by Staphylococcus aureus bacteria, leading to inflammation and reduced milk production.

Multiple choice

What is the most common cause of pyelonephritis?

  1. Escherichia coli

  2. Klebsiella pneumoniae

  3. Proteus mirabilis

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

Escherichia coli is the most common cause of pyelonephritis, accounting for about 80% of cases.

Multiple choice

Which of the following is a common foodborne illness caused by a virus?

  1. Salmonella

  2. E. coli

  3. Norovirus

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

Norovirus is a common foodborne illness caused by a virus. It is highly contagious and can cause symptoms such as vomiting, diarrhea, and stomach pain.

Multiple choice

Which of the following is a common cause of uveitis?

  1. Herpes simplex virus

  2. Toxoplasmosis

  3. Syphilis

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

Uveitis can be caused by a variety of infectious agents, including herpes simplex virus, toxoplasmosis, and syphilis.

Multiple choice

Which waterborne pathogen is commonly responsible for gastrointestinal illnesses?

  1. Cryptosporidium

  2. Giardia

  3. E. coli

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

Giardia is a protozoan parasite that can contaminate water sources and cause gastrointestinal illnesses. Symptoms of giardiasis include diarrhea, abdominal cramps, nausea, and vomiting.

Multiple choice

Which waterborne pathogen is commonly responsible for skin and respiratory infections?

  1. Cryptosporidium

  2. Giardia

  3. Legionella

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

Legionella is a bacterium that can contaminate water sources, particularly in warm and stagnant water. It can cause Legionnaires' disease, a severe form of pneumonia, and Pontiac fever, a milder respiratory illness.

Multiple choice

Which waterborne pathogen is commonly responsible for liver damage?

  1. Cryptosporidium

  2. Giardia

  3. Hepatitis A Virus

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

Hepatitis A virus can contaminate water sources and cause hepatitis A, a liver infection. Symptoms of hepatitis A include jaundice, fatigue, nausea, and vomiting.

Multiple choice

Which waterborne pathogen is commonly responsible for eye and ear infections?

  1. Cryptosporidium

  2. Giardia

  3. Pseudomonas

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

Pseudomonas is a bacterium that can contaminate water sources, particularly in warm and stagnant water. It can cause eye and ear infections, as well as skin and respiratory infections.

Multiple choice

What is the most common cause of pyelonephritis?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Bacteria are the most common cause of pyelonephritis.

Multiple choice

What is the most common cause of urethritis?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Bacteria are the most common cause of urethritis.

Multiple choice

What is the most common cause of prostatitis?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Bacteria are the most common cause of prostatitis.

Multiple choice

Which of the following diseases is caused by a bacteria that is transmitted through contact with food?

  1. Salmonella

  2. E. coli

  3. Campylobacter

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

Salmonella, E. coli, and campylobacter are all caused by bacteria that are transmitted through contact with food.