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|colspan="1" style = "font-size:140%; color:black; background: FFFAFA"|<span style="color:black>'''"Banana" gametocyte'''</span>
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<span style="font-size:90%">The gametocyte stage of ''P.falciparum'' has the form of a round-ended rod. The rod is slightly longer than a red cell so becomes curved by the red cell membrane and is often described a "banana shaped". This is particularly the case for longer macrogametocytes, and less so for the microgametocytes. The remaining red cell membrane (now with no haemoglobin) can often be seen on the concave side of the parasite.</br></br></span>
|colspan="1" style = "font-size:100%; color:black; background: FFFAFA"|<span style="color:navy>'''What a "banana" gametocyte?'''</span>
 
<gallery mode="nolines" widths="220px" heights="220px" >
<gallery mode="nolines" widths="220px" heights="220px" >
File:MB1.jpg|: ''P.falciparum'' macrogametocyte|link={{filepath:MB1.jpg}}
File:MB1.jpg|<span style="font-size:90%">''P.falciparum'' macrogametocyte</span>|link={{filepath:MB1.jpg}}
File:MBi2.jpg|: ''P.falciparum microgametocyte''|link={{filepath:MBi2.jpg}}
File:MBi2.jpg|<span style="font-size:90%">''P.falciparum microgametocyte''</span>|link={{filepath:MBi2.jpg}}
</gallery>
</gallery>




<span style="color:navy>'''Description'''</span>
<span style="font-size:90%">A clear banana form is typical of  ''P.falciparum'' indicating that diagnosis - although other features must fit, and be sure to exclude artefact.</br></span>
 
 
The gametocyte stage of ''P.falciparum'' has the form of a round-ended rod. The rod is slightly longer than a red cell so becomes curved by the red cell membrane and is often described a "banana shaped". This is particularly the case for longer macrogametocytes, and less so for the microgametocytes. The remaining red cell membrane (now with no haemoglobin) can often be seen on the concave side of the parasite.
 
 
 
 
<span style="color:navy>'''Species significance'''</span>
 
 
A clear banana form is typical of  ''P.falciparum'' indicating that diagnosis - although other features must fit, and be sure to exclude artefact.
 
 
 
<span style="color:navy>'''Additional images'''</span>
 


<gallery mode="nolines" widths="220px" heights="220px" >
<gallery mode="nolines" widths="220px" heights="220px" >
File:MB3.jpg|Artefactual banana form|link={{filepath:MB3.jpg}}
File:MB3.jpg|<span style="font-size:90%">Artefactual banana form</span>|link={{filepath:MB3.jpg}}
</gallery>
</gallery>
 
<span style="font-size:90%">''This squashed and distorted trophozoite is from P.vivax that has been compressed by the red cells around it. The signs of external compression and but also the presence of Schüffner's dots in the cytoplasm of the red cell should make it clear that this is not P.falciparum''.</span>
 
This is a squashed and distorted trophozoite of ''P.vivax'' that has been compressed by the red cells around it. The signs of external compression and but also the presence of Schüffner's dots in the cytoplasm of the red cell should make it clear that this is not ''P.falciparum''.

Latest revision as of 13:24, 5 January 2025

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"Banana" gametocyte

The gametocyte stage of P.falciparum has the form of a round-ended rod. The rod is slightly longer than a red cell so becomes curved by the red cell membrane and is often described a "banana shaped". This is particularly the case for longer macrogametocytes, and less so for the microgametocytes. The remaining red cell membrane (now with no haemoglobin) can often be seen on the concave side of the parasite.

  • P.falciparum macrogametocyte

    P.falciparum macrogametocyte

  • P.falciparum microgametocyte

    P.falciparum microgametocyte


A clear banana form is typical of P.falciparum indicating that diagnosis - although other features must fit, and be sure to exclude artefact.

  • Artefactual banana form

    Artefactual banana form

This squashed and distorted trophozoite is from P.vivax that has been compressed by the red cells around it. The signs of external compression and but also the presence of Schüffner's dots in the cytoplasm of the red cell should make it clear that this is not P.falciparum.

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