Plasmodium falciparum
Plasmodium falciparum is a unicellular protozoan parasite of humans, and the deadliest species of "Plasmodium" that cause malaria in humans. It is transmitted through the bite of a female "Anopheles" mosquito. It is responsible for roughly 50% of all malaria cases. It causes the disease's most dangerous form called falciparum malaria. It is therefore regarded as the deadliest parasite in humans, causing 435,000 deaths in 2017. It is also associated with the development of blood cancer (Burkitt's lymphoma) and is classified as Group 2A carcinogen.
Mosquito-malaria theory
Based on the report of Manson's discovery, an American physician Albert Freeman Africanus King developed a proposition that malaria is transmitted by mosquitoes. He revealed his idea in 1881 to his colleagues C.V. Riley and L.O. Howard, who did not share the same opinion. Unfettered he developed the theory with proper justifications and presented it before the Philosophical Society of Washington on 10 February 1882, under the title "The Prevention of Malarial Disease Illustrating inter alia the Conservative Function of Ague". He went so far as to suggest the complete covering of Washington, DC along the Washington Monument with giant net to protect the city from malaria. His idea was ridiculed as inconceivable as scientist still believed malarial parasite was spread through inhalation or ingestion from air (still not far from the miasma theory). He did not give up, and instead formed a more elaborate argument which he published as a 15-page article in the September 1883 issue of "The Popular Science Monthly", making an introduction as:
King carefully selected his view in 19 points. To paraphrase his lengthy arguments: occurrence of malaria always coincided with conditions that are also ideal for mosquitos, such as in the time of day, geographical area, temperature, and climate. But the flaw in his proposition was that he believed malaria was transmitted by mosquito through its eggs.