RDT Quiz A Q4: Difference between revisions

Latest revision as of 09:45, 18 March 2025

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.

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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-<span style="font-size:90%">[[RDT Quiz A Q1|Go to Previous Question]]</span></br>
+<span style="font-size:90%">[[RDT Quiz A Q3|Go to Previous Question]]</span></br>
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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: EEEEEE"|<span style="color:black>'''RDT Quiz A Q4'''</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>
 <gallery mode="nolines" widths=80px heights=250px>
-File:RDT multi fail4.jpg|link={{filepath:RDT multi fail4}.jpg}
+File:RDT multi posPF1.jpg|link={{filepath:RDT multi posPF1.jpg}
 </gallery>
 <quiz display=simple>
-{<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 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.  Most 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.  Most 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.  Most consistent with a dual species infection not including ''P.falciparum''
+- <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>
 {| class="mw-collapsible mw-collapsed wikitable"
 ! 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}}
-</gallery>
-<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>
 |}
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-|colspan="1" style = "font-size:90%; color:black|<span style="color:black>[[RDT_Quiz_A_Q3|<span style="font-size:90%">Go to next question (3 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>

RDT Quiz A Q4: Difference between revisions

From MalariaETC

Latest revision as of 09:45, 18 March 2025