The question asks to identify the genus of parasites responsible for causing malaria in humans. This requires knowledge of common parasitic diseases and their causative agents.
Correct Option: C) Plasmodium is the genus of protozoan parasites that causes malaria in humans. Different species within this genus, such as Plasmodium falciparum, Plasmodium vivax, Plasmodium ovale, and Plasmodium malariae, are responsible for various forms of malaria.
The question asks to identify the species of Plasmodium that causes the most severe form of malaria. This requires knowledge of the different species of Plasmodium and the characteristics of the malaria they cause.
Correct Option: B) P. falciparum causes malignant tertian malaria, which is the most severe and life-threatening form of human malaria. It is responsible for the majority of malaria-related deaths globally.
The question asks to identify the specific vector responsible for transmitting malaria. This requires knowledge of common mosquito-borne diseases and the specific species of mosquito involved in their transmission.
Correct Option: C) Female Anopheles mosquito
The question asks about the location where sexual reproduction (sporogony) of the Plasmodium parasite occurs. Understanding the life cycle of Plasmodium, the causative agent of malaria, is crucial to answer this question. The life cycle involves two hosts: a human host and a mosquito host, with distinct stages of reproduction in each.
D) Female Anopheles mosquito — Sexual reproduction (sporogony) in the Plasmodium life cycle, which involves the fusion of gametes and the formation of sporozoites, takes place exclusively within the gut of the female Anopheles mosquito.
The question asks for the direct cause of the characteristic symptoms of malaria: recurring fever with chills. This requires understanding the life cycle of the malarial parasite, Plasmodium, within the human body and the specific stage that triggers these symptoms.
Correct Option: B) Rupture of infected RBCs releasing merozoites and toxins
This option accurately describes the event that directly leads to the malarial symptoms of recurring fever and chills. The toxins released upon RBC rupture trigger the body's immune response, causing these symptoms.
The question asks to identify an antimalarial drug that was originally derived from the bark of the Cinchona tree and used for centuries. This points to a historical and botanical origin for the drug.
Correct Option: B) Quinine — Quinine is an alkaloid extracted from the bark of the Cinchona tree and has been used for centuries to treat malaria, fitting all the criteria mentioned in the question.