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 a common cause of uveitis?

  1. Herpes simplex virus

  2. Toxoplasmosis

  3. Syphilis

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

Uveitis can be caused by a variety of infectious agents, including herpes simplex virus, toxoplasmosis, and syphilis.

Multiple choice

What are the different types of communicable disease surveillance?

  1. Passive surveillance

  2. Active surveillance

  3. Sentinel surveillance

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

There are three main types of communicable disease surveillance: passive surveillance, active surveillance, and sentinel surveillance. Passive surveillance relies on healthcare providers to report cases of communicable diseases to public health authorities. Active surveillance involves public health authorities actively seeking out cases of communicable diseases. Sentinel surveillance involves collecting data from a representative sample of the population to monitor the incidence and prevalence of communicable diseases.

Multiple choice

Which of the following is NOT a type of microbial infection?

  1. Bacterial infection

  2. Viral infection

  3. Fungal infection

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

Parasitic infections are caused by parasites, which are not microorganisms.

Multiple choice

What is the name of the process by which microorganisms cause disease?

  1. Pathogenicity

  2. Virulence

  3. Infection

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

Pathogenicity, virulence, and infection are all terms used to describe the process by which microorganisms cause disease.

Multiple choice

What is rheumatoid arthritis?

  1. An autoimmune disease that causes inflammation of the joints

  2. A degenerative joint disease that occurs when the protective cartilage that cushions the ends of bones wears down over time

  3. A type of arthritis that is caused by a bacterial infection

  4. A type of arthritis that is caused by a virus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rheumatoid arthritis is an autoimmune disease that causes inflammation of the joints.

Multiple choice

Which of the following is not a type of antigen?

  1. Bacteria

  2. Viruses

  3. Toxins

  4. Self-antigens
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Self-antigens are not antigens. They are molecules that are recognized by the immune system as belonging to the body.

Multiple choice

Which of the following is not a type of immune disorder?

  1. Autoimmune disease

  2. Immunodeficiency disease

  3. Allergy

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

Cancer is not a type of immune disorder. It is a disease in which cells grow out of control.

Multiple choice

What is the primary cause of gingivitis in animals?

  1. Poor oral hygiene

  2. Bacterial infection

  3. Tartar buildup

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

Poor oral hygiene, bacterial infection, and tartar buildup are all primary causes of gingivitis in animals.

Multiple choice

Which waterborne pathogen is commonly responsible for gastrointestinal illnesses?

  1. Cryptosporidium

  2. Giardia

  3. E. coli

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

Giardia is a protozoan parasite that can contaminate water sources and cause gastrointestinal illnesses. Symptoms of giardiasis include diarrhea, abdominal cramps, nausea, and vomiting.

Multiple choice

Which waterborne pathogen is commonly responsible for skin and respiratory infections?

  1. Cryptosporidium

  2. Giardia

  3. Legionella

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

Legionella is a bacterium that can contaminate water sources, particularly in warm and stagnant water. It can cause Legionnaires' disease, a severe form of pneumonia, and Pontiac fever, a milder respiratory illness.

Multiple choice

Which waterborne pathogen is commonly responsible for liver damage?

  1. Cryptosporidium

  2. Giardia

  3. Hepatitis A Virus

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

Hepatitis A virus can contaminate water sources and cause hepatitis A, a liver infection. Symptoms of hepatitis A include jaundice, fatigue, nausea, and vomiting.

Multiple choice

Which waterborne pathogen is commonly responsible for eye and ear infections?

  1. Cryptosporidium

  2. Giardia

  3. Pseudomonas

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

Pseudomonas is a bacterium that can contaminate water sources, particularly in warm and stagnant water. It can cause eye and ear infections, as well as skin and respiratory infections.

Multiple choice

What is the primary cause of drug-resistant infections?

  1. Overuse and misuse of antibiotics

  2. Poor hygiene practices

  3. Weak immune systems

  4. Exposure to contaminated food or water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The primary cause of drug-resistant infections is the overuse and misuse of antibiotics. When antibiotics are used incorrectly or unnecessarily, bacteria can develop resistance to them, making it harder to treat infections.

Multiple choice

Which of the following is NOT a common way that drug-resistant infections can spread?

  1. Through contact with an infected person

  2. Through contact with contaminated surfaces

  3. Through contaminated food or water

  4. Through the air
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Drug-resistant infections are typically spread through contact with an infected person, contact with contaminated surfaces, or through contaminated food or water. They are not typically spread through the air.

Multiple choice

What were some of the diseases that were transferred from Europe to the Americas?

  1. Smallpox, measles, and influenza.

  2. Typhus, cholera, and yellow fever.

  3. Bubonic plague, leprosy, and tuberculosis.

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

Some of the diseases that were transferred from Europe to the Americas include smallpox, measles, influenza, typhus, cholera, yellow fever, bubonic plague, leprosy, and tuberculosis. These diseases devastated the indigenous populations of the Americas, and they continue to be a major public health concern today.