Phylum Apicomplexa

Phylum Apicomplexa - transfusions, and shared hypodermic...

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Phylum Apicomplexa This group consists of parasitic organisms united by their possession of a unique apical complex of microtubules. Many of the organisms now placed in this group were classified in the old Phylum Sporozoa. As a group, they have complex life cycles with diverse forms at different stages. Members of this group cause malaria and toxoplasmosis. The life history of each organism has it infecting a different host for part of its growth. Toxoplasmosis is transmitted from cats to humans, with between 7 and 72% of the population infected, depending on the geographic area. Malaria is a disease that effects an estimated 300 million people woreldwide. Therer are several organisms that cause malaria. most of which are spread by mosquitoes,
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Unformatted text preview: transfusions, and shared hypodermic needles. Control of mosquito populations has led to declines in malaria in many areas. Infected individuals can be treated with a variety of medicines. However, some of the organisms that cause malaria heve developed immunity to some of the more commonly employed medicines. Plasmodium vivax, the cause of one type of malaria., is the most widespread human parasite. If a person is bitten by a female Anopheles mosquito, the parasite eventually invades the person's red blood cells, as shown in Figure 17. Chills and fever appear when red blood cells burst and release toxin into the person's blood....
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Phylum Apicomplexa - transfusions, and shared hypodermic...

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