Biology ยท General Awareness

Disease Vectors and Pathogens

820 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

Which waterborne disease is caused by the protozoan Giardia lamblia?

  1. Cryptosporidiosis

  2. Giardiasis

  3. Amebiasis

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

Giardiasis is a waterborne disease caused by the protozoan Giardia lamblia.

Multiple choice

Which of the following is NOT a potential hazard to be aware of during a safari?

  1. Malaria

  2. Yellow fever

  3. Dengue fever

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

Altitude sickness is not typically a hazard associated with safaris, as most safari destinations are at relatively low altitudes.

Multiple choice

Which of the following is a common ectoparasite that affects livestock animals?

  1. Fleas

  2. Ticks

  3. Mites

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

Ticks are common ectoparasites that attach themselves to the skin of livestock animals and feed on their blood.

Multiple choice

Which of the following is a common parasitic disease transmitted by ticks in dogs?

  1. Lyme disease

  2. Ehrlichiosis

  3. Babesiosis

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

Lyme disease is a bacterial infection transmitted by ticks, causing symptoms such as fever, joint pain, and skin rashes in dogs.

Multiple choice

What is the primary mode of transmission for Giardia lamblia?

  1. Fecal-oral route

  2. Waterborne transmission

  3. Foodborne transmission

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

Giardia lamblia is primarily transmitted through waterborne transmission, often due to contaminated drinking water or recreational water sources.

Multiple choice

What is the primary mode of transmission for Cryptosporidium parvum?

  1. Fecal-oral route

  2. Waterborne transmission

  3. Foodborne transmission

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

Cryptosporidium parvum is primarily transmitted through waterborne transmission, often due to contaminated drinking water or recreational water sources.

Multiple choice

What is the primary mode of transmission for Vibrio cholerae?

  1. Fecal-oral route

  2. Waterborne transmission

  3. Foodborne transmission

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

Vibrio cholerae is primarily transmitted through waterborne transmission, often due to contaminated drinking water or recreational water sources.

Multiple choice

What is the primary mode of transmission for Campylobacter jejuni?

  1. Fecal-oral route

  2. Waterborne transmission

  3. Foodborne transmission

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

Campylobacter jejuni is primarily transmitted through foodborne transmission, often associated with contaminated poultry or unpasteurized milk.

Multiple choice

What is the name of the mathematical model developed by Rameshwar Nath Kao to study the spread of malaria?

  1. The Kao Model

  2. The Ross-Macdonald Model

  3. The Kermack-McKendrick Model

  4. The SIR Model
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Kao Model is a mathematical model developed by Rameshwar Nath Kao to study the spread of malaria. It is a generalization of the Ross-Macdonald Model and the Kermack-McKendrick Model, and it takes into account the effects of environmental factors on the spread of malaria.

Multiple choice

Which of the following is NOT a common vector-borne disease in animals?

  1. Lyme disease

  2. Malaria

  3. Heartworm disease

  4. West Nile virus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Malaria is a mosquito-borne disease that primarily affects humans. While some species of mosquitoes can transmit malaria to animals, it is not a common vector-borne disease in animals.

Multiple choice

What is the most common cause of malaria?

  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 cause of malaria, accounting for an estimated 90% of cases worldwide.

Multiple choice

Which of the following is NOT a major risk factor for malaria?

  1. Living in a malaria-endemic area

  2. Traveling to a malaria-endemic area

  3. Having a weakened immune system

  4. Taking antimalarial medication
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Taking antimalarial medication is not a risk factor for malaria, but rather a protective factor.

Multiple choice

Which of the following is an example of an indirect contact transmission of an infectious disease?

  1. Touching an infected surface

  2. Being bitten by a mosquito

  3. Eating contaminated food

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

Indirect contact transmission occurs when a person touches an object or surface that has been contaminated with the pathogen and then touches their mouth, nose, or eyes. This can lead to infection if the pathogen is able to enter the body through these openings.

Multiple choice

Which of the following is an example of a vector-borne transmission of an infectious disease?

  1. Malaria

  2. Influenza

  3. Tuberculosis

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

Vector-borne transmission occurs when a pathogen is transmitted from one person to another by an arthropod, such as a mosquito, tick, or flea. Malaria is an example of a vector-borne disease, as it is transmitted by mosquitoes.

Multiple choice

What was the name of the flea that transmitted the Black Death?

  1. Xenopsylla cheopis

  2. Ctenocephalides felis

  3. Pulex irritans

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

The Black Death was transmitted by the flea Xenopsylla cheopis, which lived on black rats.