Biology · 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 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.

Multiple choice

Which of the following is NOT a way that microbes can cause disease:

  1. producing toxins

  2. damaging cells

  3. triggering an immune response

  4. blocking nutrient absorption

  5. altering gene expression
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Microbes can cause disease by producing toxins, damaging cells, triggering an immune response, or blocking nutrient absorption, but they do not typically alter gene expression.

Multiple choice

Which of the following is NOT a common type of bacterial infection:

  1. pneumonia

  2. tuberculosis

  3. strep throat

  4. influenza

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

Influenza is a viral infection, not a bacterial infection.

Multiple choice

What are Non-Communicable Diseases (NCDs)?

  1. Diseases that are not caused by infectious agents.

  2. Diseases that are not transmitted from person to person.

  3. Diseases that are not curable.

  4. Diseases that are not preventable.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NCDs are diseases that are not caused by infectious agents, such as bacteria or viruses. They include diseases such as heart disease, stroke, cancer, diabetes, and chronic respiratory diseases. NCDs are a major cause of death and disability worldwide.

Multiple choice

What is the most common cause of pelvic inflammatory disease (PID)?

  1. Chlamydia

  2. Gonorrhea

  3. Mycoplasma genitalium

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

Chlamydia is the most common cause of pelvic inflammatory disease (PID). PID is a serious infection of the female reproductive organs that can lead to infertility and other health problems.

Multiple choice

What is the most common cause of vulvovaginal candidiasis (yeast infection)?

  1. Candida albicans

  2. Candida glabrata

  3. Candida krusei

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

Candida albicans is the most common cause of vulvovaginal candidiasis (yeast infection). It is a type of fungus that can cause itching, burning, and discharge.

Multiple choice

What is the primary mode of transmission of avian influenza among wild birds?

  1. Direct contact

  2. Fecal-oral route

  3. Respiratory droplets

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

Avian influenza is primarily transmitted among wild birds through respiratory droplets, which can occur during close contact, such as when birds share the same airspace or engage in aggressive behaviors.

Multiple choice

Which disease is responsible for the decline of amphibian populations worldwide?

  1. Chytridiomycosis

  2. Ranavirus

  3. Batrachochytrium dendrobatidis

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

Chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis, has been identified as a major factor in the decline of amphibian populations worldwide, leading to the extinction of numerous species.