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

Cerebral malaria is caused by

  1. Plasmodium vivax

  2. Plasmodium ovale

  3. Plasmodium malariae

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

Type of Malaria                                               Pathogen Cerebral malaria             -                      Plasmodium falciparum Benign tertian malaria     -                      Plasmodium vivax Quartan malaria             -                      Plasmodium malariae Oval malaria                  -                      Plasmodium ovale 

Multiple choice

Schizont stages of malarial parasite in man are found in

  1. Erythrocytes

  2. Erythrocytes and liver cells

  3. Erythrocytes, liver and spleen

  4. Erythrocytes, brain and liver cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sporozoites are carried by the blood to the liver, where they mature into forms known as schizonts.

Multiple choice

Where will you look for the sporozoites of the malarial parasite?

  1. Red blood corpuscles of human suffering from malaria

  2. Spleen of infected humans

  3. Salivary glands of freshly moulted female Anopheles mosquito

  4. Salivary glands of freshly moulted female Anopheles mosquito
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sporozoites are the infective stage of malarial parasite. They are present in the saliva of infected femaleAnopheles mosquito. This infective stage is directly goes to parenchyma cells of liver.

Multiple choice

Filaria is caused by a worm called

  1. Trichinella spiralis

  2. Wuchereria bancrofti

  3. Ancylostoma duodenale

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

Wuchereria bancrofti is a nematode which infects the lymphatic system causing swelling of certain body parts in humans.

Multiple choice

In which of the following sets of diseases, Aedes aegypti is a carrier?

  1. Breakbone fever, yellow plague, chikungunya

  2. Breakbone fever, malaria, yellow plague

  3. Breakbone fever, malaria, nervous fever

  4. Malaria, gastric fever, chikungunya

  5. Slow fever, chikungunya, yellow fever
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aedes aegypti is a mosquito that can spread the breakbone fever, yellow plague and chikungunya, apart from other diseases.

Multiple choice

Malaria and yellow fever germs are carried by

  1. birds

  2. flies

  3. mosquitoes

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

Mosquitoes act as vectors for various diseases, including malaria (Anopheles) and yellow fever (Aedes). They transmit the pathogens by biting humans and transferring the germs through their saliva.

Multiple choice

Malaria is transmitted by

  1. male Anopheles

  2. female Anopheles

  3. both (1) and (2)

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

Malaria is a vector-borne disease 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

Which of the following is an endoparasite of man?

  1. Mites

  2. Bed bugs

  3. Round worms

  4. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Round worms (nematodes like Ascaris) are classic examples of endoparasites that live inside the human body. Mites and bed bugs are ectoparasites that live on the surface of the host.