Question

Malarial parasite can be best obtained from the patient
A. five hours after temperature becomes normal
B. when temperature rises after vigour
C. one hour before rises of temperature
D. Any time

Answer 1

Hint: Malarial parasite is a genus of single cellular eukaryotes that are obligate parasites of vertebrates and insects. The life cycles of Plasmodium species include progress in a blood-feeding insect host which then inserts parasites into a vertebrate host at the time of blood meal. Parasites produce within a vertebrate body tissue (often the liver) before entering the bloodstream to contaminate red blood cells.

Complete answer:
Malaria is caused by the Plasmodium which completes its life cycle with the help of two hosts which are mosquito and human. When it gets inside the human body, at the merozoite phase they enter the bloodstream and lysed RBCs and are distinguished by the high fever, and eventually temperature rises. At this time most of the parasite is hanging around the bloodstream therefore, it is the best time to gather the blood sample from the patient.
The ensuing obliteration of host red blood cells can affect this disease. Some parasites are chosen up by a blood-feeding insect during this infection (mosquitoes in majority cases), enduring the life cycle.
Time duration is not the determining factor to obtain a malarial parasite from the patient.

Hence, the correct answer is option (B).

Note: Parasites first contaminate the liver or other tissue, where they exhibit a single large round of replication before exiting the host cell to contaminate erythrocytes. However, for most Plasmodium species, the parasites in infected liver cells are only what are known as merozoites. After rising from the liver, they enter red blood cells. Then they go through unremitting cycles of erythrocyte infection, while a small proportion of parasites differentiate into a sexual stage known as gametocyte which is picked up by an insect host taking a blood meal.