Beginning of Essay
parasites have been with us since the beginning of time, and fossils of mosquitoes up to thirty million years old show that ’s vector has existed for just as long. The parasites causing are highly specific, with man as the only host and mosquitoes as the only ....

Middle of Essay
.... specific, but the parasites are too, with only 60 of 380 species of female Anopheles mosquitoes as vectors. With the exception of Plasmodia Malariae which may affect other primates, all parasites of malaria have only one host, Homo sapiens. Because some mosquitoes contain substances toxic to Plasmodium in their cells, not all species of mosquitoes are vectors of Plasmodium. Although very specific, malaria still causes disruption of over three hundred million people worldwide each year (Cann, 1996). The life cycle of the parasite causing malaria exists between two organisms, humans and the Anopheles mosquito. When a female mosquito bites a human ....