Biology · 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
  1. house fly

  2. mosquito

  3. honey bee

  4. tse-tse fly

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Trypanosoma brucei, the causative agent of African sleeping sickness, is transmitted to humans by the bite of an infected tsetse fly (Glossina).

Multiple choice
  1. sand fly

  2. glossina palpalis

  3. fruit fly

  4. ticks

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sleeping sickness is transmitted by the tsetse fly, which belongs to the genus Glossina (e.g., Glossina palpalis).

Multiple choice
  1. sand fly

  2. culex mosquito

  3. anophilous mosquito

  4. tse tse fly

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Culex mosquito transmit filariasis.

Multiple choice
  1. bacteria

  2. mosquitoes

  3. protozoa

  4. virus

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Filariasis is a parasitic disease caused by microscopic, thread-like worms, which are transmitted to humans through the bites of infected mosquitoes.

Multiple choice
  1. Cholera

  2. Tuberculosis

  3. Typhoid

  4. Polio

  5. Diarrhoea

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. Polio, which is a serious disease that affects the nerves of the spine and often makes a person permanently unable to move, is not spread by a housefly.

Multiple choice
  1. encephalitis

  2. dengue fever

  3. yellow fever

  4. filariasis

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is a serious concern that malaria can go on to spread far and wide because when an Anopheles is contaminated with malaria, it stays within it for life and this infects all those that it bites. It is found that the malaria infected Anopheles mosquito has more appetite than an uninfected mosquito. This makes the potential spread of malaria. Other than spreading malaria, Anopheles mosquitoes are also vectors of Filariasis which is a disease caused by nematodes in the blood or tissues of the body causing blockage of lymphatic vessels. 

Multiple choice
  1. ascaris

  2. leech

  3. earthworm

  4. nereis

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Leeches are 'worms' with suckers on each end. Leeches can range in size from one centimeter to over 25 centimeters long. They are brown or black in colour. Some feed on decaying plant material. Others are parasites, feeding on blood and tissue of other animals. Blood-sucking leeches suck your blood in two ways: they use a proboscis to puncture your skin, or they use their three mouths and millions of little teeth. 

Multiple choice
  1. male anopheles

  2. female anopheles

  3. micro anopheles

  4. macro anopheles

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Malaria is transmitted to humans through the bite of an infected female Anopheles mosquito. Male mosquitoes feed on plant nectar and do not bite humans.

Multiple choice
  1. Candida tropicalis

  2. Candida lusitaniae

  3. Candida parapsilosis

  4. Candida guilliermondii

  5. Candida norvegensis

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Candida norvegensis is a very rare clinical isolate that has been reported as a causative agent of peritonitis, and disseminated candidiasis in a patient on CAPD.