No C-Line = No Result
A missing Control (C) line renders the test invalid. Common causes include:
- Conjugate Death: Gold nanoparticles aggregated or antibodies denatured.
- Membrane Dry-out: Old strips stored without desiccants.
- Flow Obstruction: Sample pad clogging preventing liquid from reaching the C-line.
Switching to Due Bio robustly packaged and stabilized strips can reduce invalid rates by >90% in field settings.