Key Aspects of Rapid Malaria Antigen Tests

• Interpretation: A single line at 'C' (Control) is negative, while two or three lines (including at 'T') indicates a positive result.
• Performance: RDTs are generally accurate and crucial where microscopy is unavailable, though they can sometimes produce false results if read too early, too late, or if antigen levels are low.
• Benefits: They enable rapid treatment, particularly in endemic areas with limited laboratory infrastructure. 

  Procedure: A small blood sample is taken via finger-prick, mixed with a buffer solution, and added to the test cassette.

• Mechanism: They use monoclonal antibodies to detect parasite proteins like HRP-2 (

  𝑃.𝑓𝑎𝑙𝑐𝑖𝑝𝑎𝑟𝑢𝑚) or pLDH (𝑃.𝑣𝑖𝑣𝑎𝑥 and others), providing a colored line in the result window.

Limitations

• They are qualitative, not quantitative, meaning they don't tell how high the parasite count is.
• Certain tests may not detect all malaria species equally well, or might remain positive for a period even after successful treatment (especially HRP-2 tests).