Question

A mosquito infected with Plasmodium vivax bites a human. After entering of the sporozoites into the human body, what is the LAST phase of the infectious life cycle of this protozoan pathogen there?

A) The sporozoites enter red blood cells and go into the ring stage

B) the sporozoites unite to form the zygote

C) the sporozoites undergo schizogony to form merozoites

D) sporozoites transform into male and female gametocytes

E) the sporozoites integrate their DNA into the liver cell DNA

Answer 1

Let's have some data about it:--

Malaria also called: plasmodium infection.

Or

disease caused by a plasmodium parasite, transmitted by the bite of infected mosquitoes.

Let's take a look on the stage by which it will pass:--

The first stage after invasion is a ring stage that evolves into a trophozoite.

The next cellular stage is the erythrocytic schizont (initially immature and then mature schizont). Each mature schizont gives birth to new generation merozoites (erythrocytic schizogony) that, after RBCs rupture, are released in the blood stream in order to invade other RBCs.

The liver phase occurs only once while the erythrocytic phase undergoes multiple cycles; the merozoites release after each cycle creates the febrile waves.

*A second scenario into the RBCs is the parasite differentiation into male and female **gametocytes that is a non pathogenic form of parasite. When a female anopheles mosquito bites an infected person, it takes up these gametocytes with the blood meal

So option D is correct.