Makers of Advanced Rapid Diagnostic Products


BioSign® Strep A (cassette)

Biosign strepa cassette

Immunoassay for the Detection of Group A Streptococcal Antigen
Directly from Throat Swab Specimens

  • Easy-to-read color
  • Built-in test control
Time to Results 5-10 minutes
Specimen Types Throat swab
Internal Control Yes
External Controls Yes
Storage 2-30°C (35-86°F)
Relative Sensitivity 96.2%
Relative Specificity 98.7%
Overall Accuracy 98.0%
Biosign strepa cassette procedure1
  1. Dispense 4 drops of Reagent A (yellow) into extraction tube.
  2. Add 4 drops of Reagent B into the extraction tube. Mix solution by shaking the tube gently.
    (The solution will turn pink.)
  3. Immediately place the specimen swab in the extraction tube. Rotate the swab vigorously in the extraction solution to extract specimen thoroughly.
  4. Let stand for 1–2 minutes.
  5. Biosign strepa cassette procedure2
  6. Remove the swab—squeeze the liquid out of the swab. Discard the swab.
  7. Add 4 drops (90-120 µL) of the extracted solution into the Sample well (S) using a transfer pipette.
  8. Read the result in 5 minutes, after a distinct color line has formed in the Control window (C), but no later than 10 minutes after the extracted solution has been added to the Sample well.
Product Kit Size Catalog Number CLIA Complexity
BioSign® Strep A (cassette) 25 BSP-181-25 Moderate