View source for Co-infection with two species

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|colspan="1" style = "font-size:140%; color:black; background: FFFAFA"|<span style="color:black>'''Dual species infection'''</span>


<span style="font-size:90%">Mixed-species malaria infections certainly occur. Their precise frequency will vary according to the case-mix in the area concerned.</br></br>In endemic areas where multiple malarial species circulate estimates of prevalence may be as high as 30%, but in other areas this is far lower and would often be regarded as forming fewer than 5% of infections.</span>

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<span style="font-size:90%">Recogition by morphology requires the presence of parasite forms that have recognisable species-specific features for two separate species. This may sometimes be easy, but can be challenging when one species predominates. Some examples are shown below:</br></br></span>

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File:Dual1.jpg|<span style="font-size:90%"></span>|A|link={{filepath:Dual1.jpg}}
File:Dual2.jpg|<span style="font-size:90%"></span>|B|link={{filepath:Dual2.jpg}}
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<span style="font-size:90%">'''Image A''': two gametocytes in separate red cells. These clearly have different appearances - one has the elongated and curved form typical of ''P.falciparum'', while the second is "round" with visible round bametocytecytoplasmic dots and fimbriation of the red cell - appearances of ''P.ovale''.</br<</br>'''Image B''': a large parasite within the red cell is clearly seen and has the chacteristics of a microgametocyte of ''P.ovale'', but note also a small fine early "double dot" ring form  of ''P.falciparum'' that is within the same erythocyte - an unusual "dual-parasite" erythrocyte!</span>