Question

Post-erythrocytic part of life cycle of Plasmodium is called

• A. Golgi cycle
• B. Krebs cycle
• C. Shortt cycle
• D. Ross cycle

Answer 1

The correct option is D Ross cycle

• The human infection begins when an infected female Anopheles mosquito bites a person and injects saliva infected with sporozoites into the blood circulation. That is, the first life stage of Plasmodium (stage of infection).
• The next stage in malaria life cycle is the one of asexual reproduction that is divided into different phases the pre- erythrocytic (or exoerythrocytic) and the erythrocytic phase. Within 30- 60 minutes after the parasites inoculation, sporozoites find their way through blood circulation to their first target, the liver.
• The sporozoites enter the liver cells and start dividing leading to schizonts creation in 6- 7 days. Each schizont gives birth to thousands of merozoites (exoerythrocytic schizogony) that are then released into the blood stream marking the end of the exoerythrocytic phase of the asexual reproductive stage.
• Sir Ronald Ross studied the life cycle of Plasmodium. Hence, it is known as Ross cycle.

Therefore, the correct answer is option D.