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

How do mosquitoes identify the human beings?

  1. By the smell of our body

  2. By the colour of our body

  3. By the colour of our clothes

  4. By the smell of urine

  5. By the smell of stool
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mosquitoes identify human being by the smell of body and heat of the body.

Multiple choice

Which of the following is a culture medium for a genus of bacteria that colonise the mucosal surfaces of many animals?

  1. Eaton's agar

  2. Thayer-Martin agar

  3. Bismuth sulfite agar

  4. Bordet-Gengou agar

  5. Löwenstein–Jensen medium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct because Thayer-Martin agar, a Mueller-Hinton agar with 5% chocolate sheep blood and antibiotics, is used for culturing and primarily isolating pathogenic Neisseria bacteria.

Multiple choice

Filariasis is transmitted by ____________.

  1. Aedes mosquito

  2. Anopheles mosquito

  3. Tse-tse fly

  4. Culex mosquito

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

Filariasis is a parasitic disease, which is transmitted by Culex mosquito. Filariasis is not transmitted by fleas.

Multiple choice

Elephantiasis in man is caused by

  1. ancylstoma

  2. trichinella

  3. wuchereria

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

Elephantiasis (lymphatic filariasis) is caused by nematode worms Wuchereria bancrofti or Brugia malayi. These worms block lymphatic vessels, causing severe swelling. Microfilariae are the larval stage transmitted by mosquitoes, not the causative adult worm.

Multiple choice

Diseases, which are not caused by protozoans, are

  1. filaria and amoebiasis

  2. filaria and malaria

  3. amoebiasis and malaria

  4. hydrophobia and taenia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrophobia (rabies) is a viral disease and taeniasis is caused by tapeworms (helminths). Neither is caused by protozoans. Options A and B contain filaria (nematode), while option C contains only protozoan diseases (amoebiasis, malaria).