Biology ยท General Awareness

Disease Vectors and Pathogens

844 Questions

Disease vectors and pathogens examine how organisms like Plasmodium and Leishmania transmit infections. Test items require matching vectors to specific diseases. Studying these life cycles is essential for scoring well.

Plasmodium infective stagesDisease transmission modesDisease vectors and fleasIntracellular parasitesElephantiasis causes

Disease Vectors and Pathogens Questions

Multiple choice

What is the term for the person or animal that harbors and transmits an infectious agent to another person or animal?

  1. Reservoir

  2. Vector

  3. Host

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

A reservoir is the person or animal that harbors and transmits an infectious agent to another person or animal.

Multiple choice

What is the term for the person or animal that is infected with an infectious agent but does not show any symptoms of the disease?

  1. Carrier

  2. Host

  3. Vector

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

A carrier is a person or animal that is infected with an infectious agent but does not show any symptoms of the disease.

Multiple choice

Which type of microorganism is responsible for malaria?

  1. Bacteria

  2. Viruses

  3. Fungi

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

Malaria is caused by a protist, specifically a protozoan called Plasmodium.

Multiple choice

Which of the following is NOT an example of a vector-borne disease that is affected by climate change?

  1. Malaria

  2. Dengue fever

  3. Chikungunya

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

Influenza is not a vector-borne disease, so it is not directly affected by climate change. Malaria, dengue fever, and chikungunya are all vector-borne diseases that are affected by climate change.

Multiple choice

What is the primary role of viruses in the environment?

  1. To decompose organic matter

  2. To produce oxygen

  3. To regulate climate

  4. To infect living organisms
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Viruses primarily infect living organisms, including animals, plants, and bacteria, and can cause a wide range of diseases.

Multiple choice

What is the primary mode of transmission for protozoan infections?

  1. Airborne

  2. Waterborne

  3. Contact

  4. Vector-borne
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Protozoan infections are primarily transmitted through the bite of an infected insect or other vector, such as a mosquito or tsetse fly.

Multiple choice

Which of the following is NOT a method used in genetic epidemiology:

  1. Genome-wide association study (GWAS)

  2. Linkage analysis

  3. Candidate gene study

  4. Meta-analysis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Meta-analysis is a statistical technique used to combine results from multiple studies, not a specific method in genetic epidemiology.

Multiple choice

Which of the following foods is most commonly associated with Campylobacter outbreaks?

  1. Poultry

  2. Beef

  3. Pork

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

Poultry is the most commonly associated food with Campylobacter outbreaks.

Multiple choice

The Asian tiger mosquito is a known vector for:

  1. Malaria

  2. Dengue fever

  3. Yellow fever

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

The Asian tiger mosquito is a known vector for malaria, dengue fever, and yellow fever, posing a significant public health risk in many regions.

Multiple choice

Which of the following diseases is NOT commonly associated with dams and irrigation projects?

  1. Malaria

  2. Dengue fever

  3. Typhoid

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

Malaria, dengue fever, and typhoid are all waterborne diseases that can be spread through dams and irrigation projects, while asthma is a respiratory condition not directly related to water.

Multiple choice

Which of the following is a parasitic infection that causes a fever, headache, and muscle aches?

  1. Malaria

  2. Dengue fever

  3. Chikungunya fever

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

Malaria is a parasitic infection that causes a fever, headache, and muscle aches.

Multiple choice

What is the term for a skin infestation caused by tiny mites that burrow under the skin, causing intense itching?

  1. Scabies

  2. Lice

  3. Fleas

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

Scabies is a skin infestation caused by tiny mites that burrow under the skin, causing intense itching.

Multiple choice

What is the basic reproductive number, denoted by R0, in the context of epidemiology?

  1. The average number of secondary infections caused by a single infected individual in a completely susceptible population.

  2. The total number of individuals infected by a single infected individual over the course of their infectious period.

  3. The proportion of the population that is immune to a particular disease.

  4. The rate at which a disease spreads through a population.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

R0 is a key parameter in mathematical models of infectious disease spread. It determines the potential for an outbreak and the scale of the epidemic.

Multiple choice

What is the most common type of malaria in urban areas?

  1. Plasmodium falciparum

  2. Plasmodium vivax

  3. Plasmodium ovale

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

Plasmodium falciparum is the most common type of malaria in urban areas, accounting for over 90% of cases.

Multiple choice

How is malaria diagnosed?

  1. Blood test

  2. Urine test

  3. Stool test

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

Malaria is diagnosed with a blood test that looks for the presence of malaria parasites.