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 zoology our health harmful microorganism for humans microbes and diseases categories of diseases

The IPN (Infectious Pancreatic Necrosis) and VMS (Viral Haemorrhagic Septicemia) are well known infectious diseases of

  1. Fish

  2. Cattle

  3. Poultry

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Viral diseases are severe infectious diseases which spread rapidly from one person to the other. Pancreatic necrosis (IPN) is a viral disease which occurs in salmon fish. It is mainly caused due to the premature killing of the cells in the living tissues.

Viral haemorrhagic septicemia (VHS) is a deadly infectious fish disease caused by the viral hemorrhagic septicemia virus. It afflicts over 50 species of freshwater and marine fish in several parts of the northern hemisphere.
Therefore, the correct answer is option A.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

What is an epidemic disease?

  1. A global outbreak of disease

  2. A disease that occurs suddenly and spreads rapidly to many people

  3. A disease that occurs only occasionally and at unpredictable intervals

  4. A disease with clinically distinct symptoms whose incidence has increased, particularly over

    the last two decades
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Explanation: An epidemic occurs when an infectious disease spreads rapidly among too many people.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

What is a communicable disease?

  1. It is a disease that can be spread to others and is contagious.

  2. It is a disease that cannot be spread and is caused by health habits and behaviours.

  3. It is a disease that is caused by bacteria in our environment.

  4. It is a disease that can be spread through food, animals, water, and the air.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Explanation: Communicable diseases are caused by pathogens passed from one human to another.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Foot and mouth disease is a highly contagious disease almost exclusive to cattle, sheep, swine, goats, and other cloven-hoofed animals. It is caused by a

  1. Fungi

  2. Bacteria

  3. Protozoa

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

Foot-and-mouth disease or hoof-and-mouth disease is an infectious and sometimes fatal viral disease that affects cloven-hoofed animals, including domestic and wild bovine. The virus causes a high fever for two or three days, followed by blisters inside the mouth and on the feet that may rupture.

Therefore, the correct answer is option D.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

The following are all common communicable diseases except

  1. Strep Throat

  2. MRSA

  3. Skin Cancer

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

Explanation: Communicable diseases are caused by pathogens passed from one human to another. Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms. Whereas, most skin cancers are caused by exposure to the sun.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

What is the main difference between communicable and non-communicable diseases?

  1. NCD can be treated whereas CD cannot

  2. CD can spread to others whereas NCD cannot

  3. CD can be treated whereas NCD cannot

  4. NCD can spread to others whereas CD cannot
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Explanation: Communicable diseases are caused by pathogens passed from one human to another. Non-communicable disease (NCD) is a medical condition or disease that is non-infectious or non-transmissible.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which one of the following is a communicable disease?

  1. Measles

  2. Cancer

  3. Heart stroke

  4. Allergy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Communicable diseases are the ones that can spread from the infected person to a healthy person.
Measles is caused by a virus which is rubella virus. It is characterized by fever, inflammation of nasal mucous membrane, red watery eyes sensitive to light, flushed face followed by a typical rash. The incubation period is about 10 days. It is a communicable disease and can transfer from one individual to another.
Hence, the correct answer is 'Measles'
Multiple choice zoology diseases and immunity vaccine and immunization infectious diseases - transmission and prevention infectious diseases and how to prevent them

The human body is immune to which of the following diseases?

  1. Small pox

  2. Diabetes

  3. Tuberculosis

  4. Jaundice
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Smallpox is an ancient disease caused by the variola virus. Early symptoms include high fever and fatigue. The virus then produces a characteristic rash, particularly on the face, arms and legs. The resulting spots become filled with clear fluid and later, pus, and then form a crust, which eventually dries up and falls off. Smallpox was fatal in up to 30% of cases. There is a vaccine against smallpox that was a key tool in the eradication of the disease. This vaccine does not contain the variola virus which causes smallpox, but a closely related virus called vaccinia. When this vaccine is given to humans, it protects them against smallpox. 
So the correct option is 'small pox'.
Multiple choice

What is the most common cause of Meniere's disease?

  1. Unknown

  2. Viral infection

  3. Autoimmune disorder

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

The exact cause of Meniere's disease is unknown, but it is thought to be caused by a combination of factors, including genetics, immune system dysfunction, and environmental triggers.

Multiple choice

What are the three main types of influenza viruses?

  1. A, B, and C.

  2. A, B, and D.

  3. A, C, and D.

  4. B, C, and D.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The three main types of influenza viruses are A, B, and C.

Multiple choice

Which type of influenza virus is most commonly associated with pandemics?

  1. Influenza A.

  2. Influenza B.

  3. Influenza C.

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

Influenza A is the type of influenza virus most commonly associated with pandemics.

Multiple choice

Which of the following is NOT a type of microbe:

  1. bacteria

  2. virus

  3. fungus

  4. protozoa

  5. prion
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Prions are not microorganisms, but rather infectious proteins.