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RDT Quiz A Q3: Difference between revisions

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|colspan="1" style = "font-size:130%; color:black; background: FFFAFA"|<span style="color:black>'''RDT Quiz A Q2'''</span>
|colspan="1" style = "font-size:130%; color:black; background: FFFAFA"|<span style="color:black>'''RDT Quiz A Q2'''</span>
</br><span style="font-size:90%">Shown below is an RDT test. This uses a pan-malarial antibody (labelled Pan) and a ''P.falciparum'' species-specific antibody (labelled Sp). The test has been used to assess a patient and the positive bands are shown on the figure.</span>
</br><span style="font-size:90%">Both microscopy and RDT tests can diagnose malaria and are often used together; however they are not identical in their characteristics.</span>
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File:RDT multi fail4.jpg|link={{filepath:RDT multi fail4}.jpg}
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{<span style="font-size:90%">Which of the following interpretions can be made? (select one or more options)</span></br></br>
{<span style="font-size:90%">Which of the following interpretions can be made? (select one or more options)</span></br></br>
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{<span style="font-size:90%">'''When comparing RDT tests and morphology in the diagnosis of malaria which statements are true?'''</br></br>
{<span style="font-size:90%">'''When comparing microscopy and RDT tests for malaria which of the following statements are correct?''' (select all true statements)</br></br>
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- <span style="font-size:90%">RDT gives superior species identification
- <span style="font-size:90%">RDT gives superior species identification
+ <span style="font-size:90%">Microscopy is more sensitivity than RDT
+ <span style="font-size:90%">Microscopy is more sensitivity than RDT
+ <span style="font-size:90%">MDT provides a more rapid diagnosis
+ <span style="font-size:90%">RDT provides a more rapid diagnosis
+ <span style="font-size:90%">RDT may be preferred in some settings
+ <span style="font-size:90%">RDT may be preferred in some settings
- <span style="font-size:90%">RDT accurately assesses parasitaemia
- <span style="font-size:90%">RDT accurately assesses parasitaemia

Revision as of 11:28, 25 November 2024


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RDT Quiz A Q2


Both microscopy and RDT tests can diagnose malaria and are often used together; however they are not identical in their characteristics.

Which of the following interpretions can be made? (select one or more options)

RDT gives superior species identification
Microscopy is more sensitivity than RDT
RDT provides a more rapid diagnosis
RDT may be preferred in some settings
RDT accurately assesses parasitaemia


Explanation of correct answer (click "Expand")
In ideal conditions a well-trained microscopist with experience in malaria, viewing a well-prepared thick blood film using a good quality microscope may detect with equal or better sensitivity than an RDT test.

In less ideal conditions where equipment, staining quality, or microscopic experience is less good, then RDTs may have equivalent or superior sensitivity to microscopy (including many malarial endemic regions where microscopy may be unavailable or where the sensitivity of microscopy is limited by training, equipment or facilities). RDTs aso provide a more rapid turnaround time allowing emergency use and rapid decision-making.


For species identification thin films are preferred to thick films or RTDS (including mixed infections), as they also allow more accurate identification of sepecies and the % of infected red-cells (for P.falciparum or P.knowlesi).


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