Interpretation guide: SINGLE BAND tests: Difference between revisions
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File:RDT_single_no band.jpg|<span style="font-size:90%"></span>|link={{filepath:RDT_single_no band.jpg}} | File:RDT_single_no band.jpg|<span style="font-size:90%"></span>|link={{filepath:RDT_single_no band.jpg}} | ||
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<span style="font-size:90%">'''Most likely interpretation:''' The species detected by the test is present and is the only malaria species infecting the individual</br></span> | <span style="font-size:90%">'''Most likely interpretation:''' The species detected by the test is present and is the only malaria species infecting the individual</br></span> | ||
<span style="font-size:90%">'''Less common but possible interpretations:''' | <span style="font-size:90%">'''Less common but possible interpretations:'''</span> | ||
*<span style="font-size:90%">There is a dual-species infection (a second species cannot be detected by single band kits)</span> | *<span style="font-size:90%">There is a dual-species infection (a second species cannot be detected by single band kits)</span> | ||
*<span style="font-size:90%">The patient recently received successful treatment, but the antigen has not yet cleared</span> | *<span style="font-size:90%">The patient recently received successful treatment, but the antigen has not yet cleared</span> | ||
Revision as of 18:57, 15 September 2024
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| RESULT PATTERN 1
|
No band appears in the control area (black arrow)
Irrespective of whether any other bands are present, this is always an invalid test: do not interpret. Report as failed test
Action:
- Repeat the test
- Consider the reasons for test failure
| RESULT PATTERN 2 |
The test has valid control line (black arrow) and an additional band in the species-specific area (red arrow)
Most likely interpretation: The species detected by the test is present and is the only malaria species infecting the individual
Less common but possible interpretations:
- There is a dual-species infection (a second species cannot be detected by single band kits)
- The patient recently received successful treatment, but the antigen has not yet cleared
- The "specific band" is a false positive result (infrequent but observed)
| RESULT PATTERN 3 |
The test has valid control line (black arrow) but there is no band in the species-specific area (red arrow)
Most likely interpretation: the species detected by the test is not present
Possible alternatives:
- A faint band was present but not seen by observer*
- The species is present but not detected due to low parasite concentration (link to reasons)
- The species is present is but not detected for technical reasons
- The species is present, but there is gene deletion of the target antigen (HRP2 tests)
- The species is present but exceeds test capacity due to very high parasite Pyrome effect (mainly HRP2 tests)