Hoʻokumu ʻia kēia pahu i ka hopena kūikawā o ka antibody-antigen a me ka immunochromatography. β-lactams, sulfonamides a me tetracyclines antibiotic i loko o ka hāpana hoʻokūkū no ka antibody me ka antigen i uhi ʻia ma ka membrane o ka dipstick hoʻāʻo. A laila ma hope o ka hopena kala, hiki ke ʻike ʻia ka hopena.