Biology · 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
  1. Athlete's foot

  2. Ringworm

  3. Lockjaw

  4. Tinnitus

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tetanus is also called lockjaw because the bacteria Clostridium tetani releases a toxin that causes severe muscle spasms, particularly in the jaw muscles (masseter muscles), making it difficult or impossible to open the mouth. This condition can be prevented through vaccination and is often associated with contaminated wounds.

Multiple choice
  1. High fever

  2. A respiratory disease

  3. Coagulation of blood

  4. Dehydration

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Thrombosis refers to the formation or presence of a blood clot (thrombus) within a blood vessel, which can obstruct blood flow. Deep vein thrombosis (DVT) in legs and pulmonary embolism are common and dangerous forms. Risk factors include prolonged immobility, surgery, pregnancy, and certain medical conditions that affect blood clotting.

Multiple choice
  1. Poliomyelitis

  2. Whooping cough

  3. Cholera

  4. Hepatitis

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pertussis, commonly known as whooping cough, is a highly contagious respiratory tract infection caused by Bordetella pertussis bacteria. It's characterized by severe coughing fits followed by a high-pitched 'whoop' sound when inhaling. The disease is particularly dangerous for infants and can be prevented through DTaP vaccination.

Multiple choice
  1. Virus

  2. Bacteria

  3. Parasite

  4. Fungus

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Scabies is caused by the microscopic parasitic mite Sarcoptes scabiei, which burrows into the upper layer of human skin. The female mite lays eggs in these burrows, causing intense itching and a characteristic rash. While fungi cause conditions like ringworm, and viruses/bacteria cause many other diseases, scabies is specifically a parasitic infestation.

Multiple choice
  1. Influenza

  2. Chicken Pox

  3. Tuberculosis

  4. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tuberculosis is caused by the bacterium Mycobacterium tuberculosis. Influenza is caused by the influenza virus, while Chicken Pox is caused by the varicella-zoster virus. TB primarily affects the lungs but can spread to other organs. It's transmitted through airborne droplets and remains a major global health concern.

Multiple choice
  1. Tetnus

  2. Pathology

  3. Plantorium

  4. Arpritis

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lockjaw is the common name for tetanus, a serious bacterial infection caused by Clostridium tetani. The infection causes painful muscle spasms, typically starting in the jaw (hence 'lockjaw'), and can spread to other parts of the body. The other options are not medical conditions or are incorrectly spelled.

Multiple choice
  1. bacteria

  2. fungi

  3. protozoan

  4. virus

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Leprosy (Hansen's disease) is caused by the bacterium Mycobacterium leprae. It is a chronic infectious disease affecting skin and nerves, not caused by fungi, protozoa, or viruses.

Multiple choice
  1. Germ cells

  2. Transitional epithelial cells

  3. Columnar epithelial cells

  4. Renal tubular cells

  5. Endothelial cell

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gonococci and the elementary body form of chlamydia enter the body by attaching to nonciliated columnar epithelial cells. Remember that infection by gonococci leads to LPS-mediated cytotoxic events on adjacent cells, causing surface damage and allowing for easier access to infection by other organisms such as chlamydia.