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")
When no band appears in the control area (black arrow) the test is ALWAYS invalid:
Irrespective of whether any other bands are present, this is always an invalid test: do not interpret. Report as failed test Action: