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Red cell crenation description: Difference between revisions

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(Created page with "---- '''Navigation'''</br> Go Back ---- {| class="wikitable" style="border-style: solid; border-width: 5px; color:black" |colspan="1" style = "font-size:100%; color:black; background: WhiteSmoke"|<span style="color:navy>'''When does red cell crenation occur?'''</span> This refers to crenation of erythrocytes that contain parasites when the normal erythrocytes are unaffected, i.e. it is a feature of the presence of parasites. The finding is so...")
 
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|colspan="1" style = "font-size:100%; color:black; background: WhiteSmoke"|<span style="color:navy>'''When does red cell crenation occur?'''</span>
|colspan="1" style = "font-size:100%; color:black; background: WhiteSmoke"|<span style="color:navy>'''When does red cell crenation occur?'''</span>


This refers to crenation of erythrocytes that contain parasites when the normal erythrocytes are unaffected, i.e. it is a feature of the presence of parasites. The finding is sometimes (though not always, seen in ''P.falciparum'' infection, particularly in later forms, and presumably rreflects altered red cell hydration.  
This refers to crenation of erythrocytes that contain parasites when the normal erythrocytes are unaffected, i.e. it is a feature of the presence of parasites. The finding is sometimes (though not always) seen in ''P.falciparum'' infection, particularly in later forms, and presumably rreflects altered red cell hydration.  




<gallery mode="nolines" widths=250px heights=250px>
<gallery mode="nolines" widths=250px heights=250px>
File:MFaccole.jpg|link={{filepath:MFaccole.jpg}}
File:MFcrenation1.jpg|link={{filepath:MFcrenation1.jpg}}
File:MFcrenation2.jpg|link={{filepath:MFcrenation2.jpg}}
</gallery>
</gallery>
<span style="font-size:80%">Note that the parasite is very closely in contact with the red cell membrane (''P.falciparum'' late trophozoite form with maurer's dots and clefts)</span>
<span style="font-size:80%">Note that the parasite is very closely in contact with the red cell membrane (''P.falciparum'' late trophozoite form with maurer's dots and clefts)</span>
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<span style="color:navy>'''Species significance'''</span>   
<span style="color:navy>'''Species significance'''</span>   


Most often considered to be a feature of p.falciparum infection and when frequent these appearances are helpful to indicate this species. However, the form is not fully specific and examples may occur in any species.
Although most frequently a feature of ''P.falciparum'' infection, the feature is often not seen, and should not be considered fully species-specific.


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<span style="color:navy>'''Additional images'''</span>
<gallery mode="nolines" widths=200px heights=200px>
File:MMaccole.jpg|A|link={{filepath:MMaccole.jpg}}
File:MVaccole.jpg|B|link={{filepath:MVaccole.jpg}}
File:MOaccole.jpg|C|link={{filepath:MOaccole.jpg}}
</gallery>
<span style="font-size:80%">Malaria Accolé forms in: early trophozoite of ''P.malarae'' (A) early trophozoite of ''P.vivax'' (B) and ealy trophozoite of ''P.ovale'' (C). Note the differences in parasite and red cell size and shape and the presence or absence of additional dots<span>

Latest revision as of 18:35, 6 June 2024


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When does red cell crenation occur?

This refers to crenation of erythrocytes that contain parasites when the normal erythrocytes are unaffected, i.e. it is a feature of the presence of parasites. The finding is sometimes (though not always) seen in P.falciparum infection, particularly in later forms, and presumably rreflects altered red cell hydration.


Note that the parasite is very closely in contact with the red cell membrane (P.falciparum late trophozoite form with maurer's dots and clefts)


Species significance

Although most frequently a feature of P.falciparum infection, the feature is often not seen, and should not be considered fully species-specific.