File:Malaria LifeCycle(French version).GIF
Malaria_LifeCycle(French_version).GIF (543 × 435 pixels, file size: 37 KB, MIME type: image/gif)
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editDescriptionMalaria LifeCycle(French version).GIF |
Malaria Plasmodium Plasmodium vivax Plasmodium ovale Plasmodium malariae Plasmodium knowlesi malaria_LifeCycle(French_version).GIF Traduction en français de l’image suivante : malaria_LifeCycle.GIF Life cycle of Malaria. The malaria parasite life cycle involves two hosts. During a blood meal, a malaria-infected female Anopheles mosquito inoculates sporozoites into the human host . Sporozoites infect liver cells and mature into schizonts , which rupture and release merozoites . (Of note, in P. vivax and P. ovale a dormant stage [hypnozoites] can persist in the liver and cause relapses by invading the bloodstream weeks, or even years later.) After this initial replication in the liver (exo-erythrocytic schizogony ), the parasites undergo asexual multiplication in the erythrocytes (erythrocytic schizogony ). Merozoites infect red blood cells . The ring stage trophozoites mature into schizonts, which rupture releasing merozoites . Some parasites differentiate into sexual erythrocytic stages (gametocytes) . Blood stage parasites are responsible for the clinical manifestations of the disease. The gametocytes, male (microgametocytes) and female (macrogametocytes), are ingested by an Anopheles mosquito during a blood meal . The parasites’ multiplication in the mosquito is known as the sporogonic cycle . While in the mosquito's stomach, the microgametes penetrate the macrogametes generating zygotes . The zygotes in turn become motile and elongated (ookinetes) which invade the midgut wall of the mosquito where they develop into oocysts . The oocysts grow, rupture, and release sporozoites , which make their way to the mosquito's salivary glands. Inoculation of the sporozoites into a new human host perpetuates the malaria life cycle |
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Source | http://www.dpd.cdc.gov/DPDx/HTML/ImageLibrary/ malaria_LifeCycle.GIF | ||||
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This image is a work of the Centers for Disease Control and Prevention, part of the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.
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current | 08:13, 13 May 2007 | 543 × 435 (37 KB) | Toxicotravail~commonswiki (talk | contribs) | {{Information| |Description= Malaria Plasmodium Plasmodium vivax Plasmodium ovale Plasmodium malariae Plasmodium knowlesi malaria_LifeCycle(French_version).GIF Traduction en français de l’image suivante : malaria_LifeCycle.GIF |
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