Plasmodium knowlesi: Morphology: Difference between revisions
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(Created page with " ---- '''Geographical distribution''' Rarely, since it is acquired only from monkey host in forest or forest-fringe in S.E.Asia with no human to human spread It is important to recognise this parasite however, since it has rapid division (each 24 hours), and may have high-parasitaemia with the potential for rapidly developing life threatening disease. Detailed geographical information may be accessed here: [https://map.ox.ac.uk/country-profiles/#!/ Malaria Atlas Proj...") |
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|style = "font-size:110%; color:black; background: gainsboro |'''Navigation'''</br> | |||
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|<span style="font-size:110%">>[[MalariaETC Index|Main malaria Index]]''</span></br> | |||
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|<span style="font-size:110%">>[[Species_identification:_summary_page|Main Species identification page]]''</span></br> | |||
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<span style="font-size:120%; color:black">''' ''Plasmodium knowlesi'' '''</br></span> | |||
'''Geographical distribution''' | </br> | ||
<span style="font-size:90%">'''Geographical distribution: '''Rarely, since it is acquired only from monkey host in forest or forest-fringe in S.E.Asia with no human to human spread It is important to recognise this parasite however, since it has rapid division (each 24 hours), and may have high-parasitaemia with the potential for rapidly developing life threatening disease.</span> | |||
Rarely, since it is acquired only from monkey host in forest or forest-fringe in S.E.Asia with no human to human spread It is important to recognise this parasite however, since it has rapid division (each 24 hours), and may have high-parasitaemia with the potential for rapidly developing life threatening disease. | |||
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Revision as of 09:57, 23 December 2024
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Plasmodium knowlesi
Geographical distribution: Rarely, since it is acquired only from monkey host in forest or forest-fringe in S.E.Asia with no human to human spread It is important to recognise this parasite however, since it has rapid division (each 24 hours), and may have high-parasitaemia with the potential for rapidly developing life threatening disease.
The early trophozoite
- Generally present and most resemble P.falciparum
- Small (1/3 to 1/2 of erythrocyte) relatively fine
- Occasionally non -vacuolated
- Double dots may be seen often at opposite poles
- Multiple infection is cells frequent, but accolé forms rare or absent
- No size change, stippling or pigment at this stage
The late trophozoite
- Usually present and most closely resemble P.malariae
- May be dense amoeboid or band-form, but generally retain a vacuole
- Acquiring pigment at late stages, may be separate or clumped
- Occasional sparse dots may seen (Sinton or Mulligan's stippling)
- Red cell size generally unaffected
The schizont
- Present in mast cases partly resemble P.malariae
- Up to 16 merozoites (exceeds P.malariae)
- Do not generally fill the erythrocyte,.may be irregular or grape-like.
- Erythrocyte not enlarged may be a irregular.
- Dots are often seen.
The gametocyte
- Gametocytes tend to be regular and round in shape.
- The parasites are small and do not generally fill the erythrocyte
- Haemoglobin is absent and pigment overlies the gametocyte
Gallery
Click here to see gallery of Plasmodium malariae forms