Biology · 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 of the following statements are incorrect regarding Plasmodium vivax?

P. Duration of exoerythrocytic cycle is 14 - 15 days.

Q. Duration of erythrocytic cycle is 48 hours.

R. Incubation period is 20 - 24 days.

S. Duration of sexual cycle is 10 days.

Select correct answer using codes given below:

  1. P and Q

  2. P and R

  3. P and S

  4. Q and R

  5. Q and S
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Duration of exoerythrocytic cycle is 8 days in Plasmodium vivax, while it is 14 - 15 days in Plasmodium malariae. Incubation period is 12 - 14 days in Plasmodium vivax, while it is 20 - 24 days in Plasmodium malariae.

Multiple choice

Elephantiasis is a parasitic infection that causes extreme swelling in the arms and legs. It is caused by animals which belong to the phylum

  1. Platyhelminthes

  2. Coelentrates

  3. Annelids

  4. Nematodes

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

It is the correct answer as Elephantiasis is caused by filarial worms, which belong to phylum Nematodes. They are parasitic worms having tissue level of organisation. They are triploblastic animals having bilateral symmetry.

Multiple choice

Directions: The following question consists of certain statements. You have to select the option representing the most logical sequencing of the given statements.

A. Malaria is caused by a protozoan bacteria. B. Anopheles mosquitoes are the carriers of this protozoan bacteria. C. Malaria results from mosquito bites. D. Mosquitoes cause malaria if they are bitten. E. Mosquitoes do not cause malaria. F. All mosquitoes do not cause malaria.

  1. ACD

  2. ABF

  3. BDE

  4. AEF
Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice

The vector of plasmodium is

  1. culex mosquito

  2. aedes mosquito

  3. anopheles mosquito

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

Anopheles mosquito is the vector of malaria.

Multiple choice

Which of the following is not a parasitic infection?

  1. Coenurosis

  2. Ascariasis

  3. Osteoarthritis

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

Osteoarthritis is the most common type of arthritis. OA is a chronic condition characterized by the breakdown of the joint’s cartilage. The breakdown of cartilage causes the bones to rub against each other, causing stiffness, pain and loss of movement in the joint.