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<quiz display=simple>
<quiz display=simple>
{<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 possible 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 possible 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>


{| class="mw-collapsible mw-collapsed wikitable"
{| class="mw-collapsible mw-collapsed wikitable"
! colspan="1" | <span style="font-size:90%">Explanation of correct answer (click "Expand")
! colspan="1" | <span style="font-size:90%">Explanation of correct answer (click "Expand")
|-
|-
|<span style="font-size:90%; color:maroon">When no band appears in the control area (black arrow) the test is ALWAYS invalid</span>: </br></br>
|<span style="font-size:90%">''Short answer taken from section "Interpretation of multi-band RDT Tests" (see this section for full details and links)''.</br></br>'''Most likely interpretation:''' The single species detected by the species specific band is present (this same species is also detected the pan-malaria band)</span>
 
<span style="font-size:90%">'''Less likely but possible interpretations:'''</span>
*<span style="font-size:90%">There are two species present in the sample (likelihood depends on country of origin, but is less likely)</span>
*<span style="font-size:90%">There is a false positive result causing both bands (unlikely)</span>
</br>


<gallery mode="nolines" widths=80px heights=160px>
File:RDT_multi_fail1.jpg|<span style="font-size:90%"></span>|link={{filepath:RDT_multi_fail1.jpg}}
File:RDT_multi_fail2.jpg|<span style="font-size:90%"></span>|link={{filepath:RDT_multi_fail1.jpg}}
File:RDT_multi_fail3.jpg|<span style="font-size:90%"></span>|link={{filepath:RDT_multi_fail1.jpg}}
File:RDT_multi_fail4.jpg|<span style="font-size:90%"></span>|link={{filepath:RDT_multi_fail1.jpg}}
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<span style="font-size:90%">Irrespective of whether any other bands are present, this is always an invalid test: '''do not interpret.''' Report as failed test</br>Action:</span>
*<span style="font-size:90%">Repeat the test</br></span>
*<span style="font-size:90%">Consider the reasons for test failure</span>
</br>
</br>
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{| class="wikitable" style="width:300px; border-left:solid 4px navy;border-right:solid 4px navy;border-top:solid 4px navy;border-bottom:solid 4px navy; font-size:100%; color:navy; align:center"
{| class="wikitable" style="width:300px; border-left:solid 4px navy;border-right:solid 4px navy;border-top:solid 4px navy;border-bottom:solid 4px navy; font-size:100%; color:navy; align:center"
|colspan="1" style = "font-size:90%; color:black|<span style="color:black>[[RDT_Quiz_A_Q5|<span style="font-size:90%">Go to next question (5 of 5)]]</span>
|colspan="1" style = "font-size:90%; color:black|<span style="color:black>[[RDT_Quiz_A_Q5|<span style="font-size:90%">Go to next question (5 of 5)]]</span>

Latest revision as of 09:45, 18 March 2025

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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 possible including P.falciparum
Two species possible not including P.falciparum
P.falciparum with HRP2 deletion
This test cannot be reported


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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