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RDT Quiz A Q4: Difference between revisions

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{<span style="font-size:90%">Which of the following interpretions can reasonably be made? (select one or more options)</span></br></br>
{<span style="font-size:90%">Which of the following interpretions can reasonably be made? (select one or more options)</span></br></br>
|type="[]"}
|type="[]"}
+ <span style="font-size:90%">1.  Consistent with a single species ''P.falciparum'' infection
+ <span style="font-size:90%">Single species: ''P.falciparum''
- <span style="font-size:90%">2.  Consistent with a single species non-''P.falciparum'' infection
- <span style="font-size:90%">Single species non-''P.falciparum''
+ <span style="font-size:90%">3.  Consistent with a dual species infection including ''P.falciparum''
+ <span style="font-size:90%">Two species including ''P.falciparum''
- <span style="font-size:90%">4.  Consistent with a dual species infection not including ''P.falciparum''
- <span style="font-size:90%">Two species not including ''P.falciparum''
- <span style="font-size:90%">5.  Suggests ''P.falciparum'' with ''HRP2'' gene-deletion
- <span style="font-size:90%">''P.falciparum'' with ''HRP2'' deletion
- <span style="font-size:90%">6.  An unreportable test
- <span style="font-size:90%">This test cannot be reported
</quiz>
</quiz>
</quiz>



Revision as of 11:13, 25 November 2024


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RDT Quiz A Q4


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.

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

Single species: P.falciparum
Single species non-P.falciparum
Two species including P.falciparum
Two species not including P.falciparum
P.falciparum with HRP2 deletion
This test cannot be reported

</quiz>

Explanation of correct answer (click "Expand")
Short answer taken from section "Interpretation of multi-band RDT Tests" (see this section for full details and links).

Most likely interpretation: The single species detected by the species specific band is present (this same species is also detected the pan-malaria band)

Less likely but possible interpretations:

  • There are two species present in the sample (likelihood depends on country of origin, but is less likely)
  • There is a false positive result causing both bands (unlikely)



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