Co-infection with two species: Difference between revisions
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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> | 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> | ||
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File:Dual2.jpg|<span style="font-size:90%"></span>|B|link={{filepath:Dual2.jpg}} | File:Dual2.jpg|<span style="font-size:90%"></span>|B|link={{filepath:Dual2.jpg}} | ||
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Image A shows the presence of two gametocytes in separate red cells. These clearly have different appearances - one has the elongated and curved form founf in ''P.falciparum'', while the second is "round" with visible cytoplasmic dots and fimbriation of the red cell - similar to ''P.ovale''. | |||
Revision as of 11:40, 21 November 2024
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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. 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:
Image A shows the presence of two gametocytes in separate red cells. These clearly have different appearances - one has the elongated and curved form founf in P.falciparum, while the second is "round" with visible cytoplasmic dots and fimbriation of the red cell - similar to P.ovale. |
