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 type of microbial pathogen?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Protozoa are not typically considered to be microbial pathogens, although some species can cause disease in humans.

Multiple choice

Which infectious disease is commonly associated with climate-induced migration?

  1. Malaria

  2. Dengue fever

  3. Cholera

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

Climate-induced migration can increase the risk of infectious diseases such as malaria, dengue fever, and cholera due to changes in vector distribution and population immunity.

Multiple choice

What is the primary mode of transmission for respiratory infections, such as the flu or COVID-19?

  1. Direct contact

  2. Airborne transmission

  3. Fomite transmission

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

Respiratory infections are primarily transmitted through airborne droplets or aerosols generated by coughing, sneezing, or talking.

Multiple choice

Which of the following is NOT a common route of transmission for gastrointestinal infections?

  1. Fecal-oral transmission

  2. Airborne transmission

  3. Bloodborne transmission

  4. Contact with contaminated surfaces
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gastrointestinal infections are primarily transmitted through fecal-oral transmission, contact with contaminated surfaces, or contaminated food or water, not through airborne transmission.

Multiple choice

Which type of cancer is caused by a virus?

  1. Cervical cancer

  2. Hepatitis B-related liver cancer

  3. Human papillomavirus-related cancers

  4. Epstein-Barr virus-related cancers

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Cervical cancer, hepatitis B-related liver cancer, human papillomavirus-related cancers, and Epstein-Barr virus-related cancers are all caused by viruses.

Multiple choice

Which of the following is a common disease affecting wild animals?

  1. Rabies

  2. Avian influenza

  3. Chytridiomycosis

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

Rabies, avian influenza, and chytridiomycosis are all common diseases affecting wild animals.

Multiple choice

Which disease is caused by a virus and affects the respiratory system of poultry?

  1. Newcastle Disease

  2. Avian Influenza

  3. Marek's Disease

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

Newcastle Disease is a highly contagious viral disease that affects the respiratory system of poultry.

Multiple choice

Which of the following is a common disease in horses caused by a bacterium?

  1. Strangles

  2. Equine Influenza

  3. Tetanus

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

Strangles is a common disease in horses caused by the bacterium Streptococcus equi.

Multiple choice

Which of the following is a common disease in poultry caused by a protozoan?

  1. Coccidiosis

  2. Avian Influenza

  3. Newcastle Disease

  4. Marek's Disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coccidiosis is a common disease in poultry caused by a protozoan parasite called Eimeria, which affects the intestinal tract.

Multiple choice

What is the most common form of tuberculosis?

  1. Pulmonary tuberculosis

  2. Extrapulmonary tuberculosis

  3. Latent tuberculosis infection

  4. Multidrug-resistant tuberculosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pulmonary tuberculosis is the most common form of tuberculosis, affecting the lungs.

Multiple choice

What is the most common cause of UTIs?

  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 UTIs. The most common type of bacteria that causes UTIs is Escherichia coli (E. coli).

Multiple choice

What is a complication of a UTI that can occur if it is not treated promptly?

  1. Kidney infection

  2. Sepsis

  3. Infertility

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

Kidney infection, sepsis, and infertility are all complications of a UTI that can occur if it is not treated promptly.

Multiple choice

Which of the following is a common bacterial disease that affects cattle?

  1. Mastitis

  2. Brucellosis

  3. Anthrax

  4. Foot-and-mouth disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mastitis is a bacterial infection of the mammary gland in cattle, often caused by bacteria such as Staphylococcus aureus and Streptococcus uberis.

Multiple choice

What is the primary mode of transmission for the highly contagious foot-and-mouth disease in livestock?

  1. Direct contact with infected animals

  2. Ingestion of contaminated feed or water

  3. Inhalation of airborne viral particles

  4. Transmission through insect vectors
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Foot-and-mouth disease is primarily transmitted through direct contact between infected and susceptible animals, including contact with saliva, nasal secretions, or blisters.

Multiple choice

Which viral disease is characterized by respiratory symptoms, fever, and a distinctive cough in dogs?

  1. Canine distemper

  2. Canine influenza

  3. Canine parvovirus

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

Canine distemper is a highly contagious viral disease that affects dogs, causing respiratory symptoms, fever, and a characteristic cough.