Species Identification: Difference between revisions
From haematologyetc.co.uk
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'''''Plasmodium falciparum''''' | '''''Plasmodium falciparum''''' | ||
[[File:PFcombi.jpg|right|400px|link=]] | [[File:PFcombi.jpg|right|400px|link=]] | ||
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*Schüffner's dots are visible in appropriately stained thin blood films | *Schüffner's dots are visible in appropriately stained thin blood films | ||
*All forms tend to circulate with large schizont and gametocyte forms present | *All forms tend to circulate with large schizont and gametocyte forms present | ||
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'''''Plasmodium ovale''''' | '''''Plasmodium ovale''''' | ||
[[File:PO combi.jpg|right|400px|link=PLASMODIUM OVALE]] | [[File:PO combi.jpg|right|400px|link=PLASMODIUM OVALE]] | ||
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*All forms tend to circulate, characteristically look for "daisy" schizonts and small round gametocytes'' | *All forms tend to circulate, characteristically look for "daisy" schizonts and small round gametocytes'' | ||
*Parasite number is often low | *Parasite number is often low | ||
''For more information'' | ''For more information'' | ||
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'''Brief Summary''' | '''Brief Summary''' | ||
*Very limited geographical distribution | *Very limited geographical distribution within S.E Asia | ||
*Small fine ring forms resemble ''P.falciparum'' | *Small fine ring forms resemble those of ''P.falciparum'' | ||
*Later rings are more solid or elongated similar to ''P.malariae'' | *Later rings are more solid or elongated similar to ''P.malariae'' | ||
*Faint dots (Sinton or Mulligan's stippling) appear at later stages | *Faint dots (Sinton or Mulligan's stippling) appear at later stages | ||
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''' | ''For more information'' | ||
*[[''Plasmodium knowlesi'': Morphology|click for full description of ''P.knowlesis'' morphology]] | |||
[[ | *[[''Plasmodium knowlesi'': Gallery|click to visit the gallery of ''P.knowlesi'' forms]] | ||
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Revision as of 17:48, 21 February 2024
Plasmodium falciparum
Brief Summary
- Small and fine ring forms may have accole’ forms or multiple parastes/cell
- Maurer's dots and clefts are seen in late trophozoites
- Schizonts very rarely seen in blood unless severe infection
- Characteristic elongated (often curved) 'banana' gametocyes may be seen
For more information
- click for full description of P.falciparum mophology
- click to visit the gallery of P.falciparum forms
Plasmodium vivax
Brief summary
- Large and robust rings that become amoeboid during later development
- Red cells become increasingly enlarged and distorted as parasites mature
- Schüffner's dots are visible in appropriately stained thin blood films
- All forms tend to circulate with large schizont and gametocyte forms present
For more information
Plasmodium ovale
Brief summary
- rings are large and robust, with ring appearance often retained in late trophozoite stage
- Red cells are enlarged often with oval shape and may have characteristic fimbriation
- Schüffner's (James) dots seen in appropriately stained samples
- All forms tend to circulate, parasites are large but tend to be smaller than for P.vivax
For more information
Plasmodium malariae
Brief summary
- Small rings (less delicate than P.falciparum) and becoming elongated or solid as parasites mature
- Red cells often small remaining a round shape and with no added dots unless heavily stained
- All forms tend to circulate, characteristically look for "daisy" schizonts and small round gametocytes
- Parasite number is often low
For more information
Plasmodium knowlesi
Brief Summary
- Very limited geographical distribution within S.E Asia
- Small fine ring forms resemble those of P.falciparum
- Later rings are more solid or elongated similar to P.malariae
- Faint dots (Sinton or Mulligan's stippling) appear at later stages
- Schizonts & gametocytes resemble P.malariae but are less "neat"
- Characteristically red cell size is unaffected, although distortion may be seen
For more information