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تحميل كتاب Parasitology or Mycology Lecture Guide Malaria PDF
نبذة عن كتاب Parasitology or Mycology Lecture Guide Malaria
كتاب Parasitology or Mycology Lecture Guide Malaria
نبذه عن الكتاب: Subphylum Sporozoa - Malaria A. Introduction Four species of malaria parasites infect humans, Plasmodium vivax, P. ovale, P.malariae, and P. falciparum. All are transmitted by female Anopheles sp. mosquitoes. Recent years have seen a resurgence in numbers of cases of malaria due to increased travel to malarious regions, political and civil unrest, development of drug resistance by malaria parasites, resistance to insecticides by mosquitoes, and government’s failure to adequately fund control measures. B. Life cycle: The mosquito injects sporozoites while feeding; these enter hepatocytes within 30 minutes and multiply asexually forming merozoites. Upon rupture of the infected hepatic cell, merozoites invade red blood cells and begin an erythrocytic cycle - rings to trophozoites to schizonts or gametocytes. Schizonts continue the erythrocytic cycle, whereas, gametocytes are picked up by female Anopleles spp. mosquitoes. In the mosquito, sexual reproduction takes place. Gametes are fertilized; the resulting motile ookinete penetrates the mosquito’s stomach wall forming a zygote on the hemocele side of the stomach. Sporozoites develop within the zygote; this structure ruptures and escaping sporozoites invade the salivary gland of the mosquito. .هذا الكتاب من تأليف غير معروف و حقوق الكتاب محفوظة لصاحبها
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