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P.falciparum schizont gallery: Difference between revisions

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<span style="font-size:95%">'''Summary'''</span>
<span style="font-size:95%">'''Summary'''</span>
<span style="font-size:95%">At this stage we look for rings that are slightly thicker though still small with typical ring form, the red cells tend to become crenated and pale, losing central pallor as the parasites mature. Typical accolé forms, double chromatin dot forms, and multiple parasites within infected red cells are still present.
<span style="font-size:95%">The schizonts of ''P.falciparum'' sequester in the small vessels and rarely circulate in blood; when found they usually signify a very severe infection. If this is not the case then it is appropriate to ask if there is a different species causing the infection. Generally these are loosely formed with variable numbers of merozoites and a single clump of pigment, they are not "neat" like the parasites of ''P.malariae''.


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<gallery mode="traditional" widths=240px heights=240px>
<gallery mode="traditional" widths=240px heights=240px>
File:PFS1p.jpg|<span style="font-size:80%">'''Late rings''' Two cells both with typical dots: multiply infected and double dot forms</span>|link={{filepath:PFS1p.jpg}}
File:PFS1p.jpg|<span style="font-size:80%">'''Mature schizonts''' note the clumped brown pigment surrounded by loosely arranged merooites, some are early forms that are less well separated</span>|link={{filepath:PFS1p.jpg}}
File:PFS2p.jpg|<span style="font-size:80%">'''Double chromatin dot form''' also Maurers dost and clefts, slight crenation and lost pallor</span>|link={{filepath:PFS2p.jpg}}
File:PFS2p.jpg|<span style="font-size:80%">'''A single merozoite''' the parasite is recognisable with just 4-5 merozoites and no pigment within a degenerate erythrocyte</span>|link={{filepath:PFS2p.jpg}}
File:PFS3p.jpg|<span style="font-size:80%">'''Accolé form''': closely associated with the red cell membrane, scanty mauers dots</span>|link={{filepath:PFS3p.jpg}}
File:PFS3p.jpg|<span style="font-size:80%">'''Late schizonts''': 16-20 late merozoites prior to release are well formed and clearly separated with obvious pigment</span>|link={{filepath:PFS3p.jpg}}
</gallery>"
</gallery>"

Latest revision as of 10:48, 21 March 2024

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P.falciparum gallery of late trophozoites


Summary The schizonts of P.falciparum sequester in the small vessels and rarely circulate in blood; when found they usually signify a very severe infection. If this is not the case then it is appropriate to ask if there is a different species causing the infection. Generally these are loosely formed with variable numbers of merozoites and a single clump of pigment, they are not "neat" like the parasites of P.malariae.

  • Mature schizonts note the clumped brown pigment surrounded by loosely arranged merooites, some are early forms that are less well separated

    Mature schizonts note the clumped brown pigment surrounded by loosely arranged merooites, some are early forms that are less well separated

  • A single merozoite the parasite is recognisable with just 4-5 merozoites and no pigment within a degenerate erythrocyte

    A single merozoite the parasite is recognisable with just 4-5 merozoites and no pigment within a degenerate erythrocyte

  • Late schizonts: 16-20 late merozoites prior to release are well formed and clearly separated with obvious pigment

    Late schizonts: 16-20 late merozoites prior to release are well formed and clearly separated with obvious pigment

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