BIOL 2020U Lecture Notes - Anemia, Trematode Life Cycle Stages, Schistosomiasis

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29 Jan 2013
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Infected female mosquitoes are feeding human blood: secretes salvia which contains anticoagulants (anti blood-clotting agents, sporozoites (young malarial parasites) in the salvia enter blood. Latent period: parasites migrate to liver cells / undergo asexual reproduction / develop into merozoites, merozoites infect red blood cells / undergo asexual reproduction / produce more merozoites. Outbreak: merozoites burst out of red blood cells to infect more cells, this outburst is associated with bouts of fever, some merozoites develop into gametocytes. Infection of female mosquitos: gametocytes are taken up by female mosquitos that feed on the infected person"s blood. Inside the female mosquito, gametes produced by those gametocytes fuse (sexual reproduction phase: results in zygotes which develop into sporozoites, sporozoites move into the salivary glands of the female mosquito where they can be injected into another person. Name of a genus of parasitic flatworms; causes the disease bilharzia in humans. Two hosts for lifecycle: fresh water snails (vector) and humans.

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