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

'Contagium virus fluidum' refers to __________.

  1. polluted drinking water

  2. a fluid containing virus

  3. an infected drug

  4. a virus

  5. a disease
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Contagium vivum fluidum was a phrase first used to describe a virus and underlined its ability to slip through the finest-mesh filters then available, giving it almost liquid properties.

Multiple choice

Which of the following is not a property of communicable diseases?

  1. They are brought about by external factors.

  2. They cannot pass from one person to another.

  3. Transmission of infection occurs through direct contact or some medium.

  4. Community hygiene can reduce the incidence of these diseases.

  5. These diseases are caused by attack of pathogens.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option as this is not a property of communicable diseases. They can pass from one person to another.

Multiple choice

Direct transmission and indirect transmission are the two means of transmission of infectious diseases. Which of the following diseases spread through indirect transmission?

a. Tetanus b. Hepatitis c. Amoebiasis d. Rabies

  1. Only a and b

  2. Only b and d

  3. Only b and c

  4. Only a and c

  5. Only a and d
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. Hepatitis and amoebiasis spread through indirect transmission. These diseases spread through contaminated food and water.

Multiple choice

Which of the following is an example of zoonosis disease?

  1. Measels

  2. Diptheria

  3. Rabies

  4. Leprosy

  5. Influenza
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Any disease or infection that is naturally transmissible from vertebrate animals to humans and vice-versa is classified as a zoonosis disease.is a viral disease that causes acute encephalitis in warm-blooded animals. The disease is zoonotic.

Multiple choice

Which of the following viruses often causes ARD?

  1. Rotavirus

  2. Reovirus

  3. HSV-1

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

Adenovirus causes many airborne infections in respiratory tract and eyes. In adults, Acute Respiratory Disease (ARD) and acute follicular conjunctivitis may develop. In children and infants, acute febrile pharyngitis often develops. Adenovirus is icosahedral virus made up of double stranded DNA and does not possess lipid layer. Human adenovirus is classified into 4 groups on the basis of their capability to agglutinate blood cells of monkey or rats.

Multiple choice

“TSS is a rare Staphylococcal infection.” What does TSS mean?

  1. Pyogenic infection

  2. Highly contagious infection

  3. Inflammatory infection

  4. Abnormalities during menstrual period
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Toxic Shock Syndrome (TSS) is the rare Straphylococcal infection that mainly occurs in young women during menstrual period. Sometimes, the disease is developed in males as well. Symptoms are caused may be due to exotoxin C which involves fever, diarrhoea, vomiting, shock and skin rashes. If the disease is not treated, it may be fatal.

Multiple choice

“Corynebacterium diphtheria causes diphtheria. It produces number of virulence factors.” Which of the following virulence inactivates mitochondrial membrane of phagocytes?

  1. Diphthin

  2. Trehalose dimycolate

  3. K antigen

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

Trehalose dimycolate (cord factor) inactivates mitochondrial membrane of phagocytes and other normal cells. Diphtheria bacillus is the slender rod has the tendency of forming chains. Bacilli are pleomorphic, non-spore producing, non-capsulated and non-motile. Polymetaphosphate are present in the cells and these are highly stained with Gram stains.