CR 20-036 71110-IFU
INTERPRETATION OF RESULTS
Positive result
At 10 minutes, the appearance of any shade of a red
color band below the dark purple control band,
indicates a positive result for the presence of SARS-
CoV-2 viral antigen. Report positive test results as
'Positive for SARS-CoV-2 viral antigen'. A positive
result does not rule out co-infections with other
pathogens.
Negative result
At 10 minutes, the appearance of ONLY the dark
purple control band indicates SARS-CoV-2 viral
antigen were not detected. A negative result indicates
that the sample is negative for antigen or the antigen
level is below the detection limit.
A negative result does not exclude SARS-CoV-2 viral
infection and should be confirmed by molecular
diagnostic method if COVID-19 disease is suspected.
Invalid result
If at 10 minutes, the dark purple control band does not
appear, regardless if a test band appears, the result is
considered invalid. If the test is invalid, a new test
should be performed with a new patient sample and a
new test strip.
PERFORMANCE CHARACTERISTICS
Analytical Sensitivity
The limit of detection (LoD) for the QuickProfile™ COVID-19 Antigen Test was established in an
analytical sensitivity study performed with one virus strain and three recombinant nucleocapsid
proteins. The LoD was confirmed by testing a total of 10 replicates at the target concentration to
demonstrate detection at least 95% of the time.
No. Item Limit of Detection
1 SARS-CoV-2, USA-WA 1/2020 3.80 x10
2
TCID
50
/mL
2 Recombinant N Protein 1 < 1 ng/mL
3 Recombinant N Protein 2 < 1 ng/mL
4 Recombinant N Protein 3 < 1 ng/mL
Cross Reactivity
The cross reactivity of the QuickProfile™ COVID-19 Antigen Test was evaluated with a total of 6
bacteria, 13 viruses. Bacteria were evaluated at a concentration over 10
8
CFU/ml. Viruses were
evaluated at a concentration of over 10
4
TCID
50
/ml. None of the microorganisms tested in the
following table gave a positive result.
Bacteria panel
Escherichia coli Staphylococcus aureus
Haemophilus influenzae Staphylococcus epidermidis
Pseudomonas aeruginosa Streptococcus pneumoniae
Viral panel
Corona virus (HCoV-OC43) Influenza B virus (B/TW/2668/19 Yamagata)
Corona virus (HCoV-NL63) Adeno virus type 7
Corona virus (HCoV-229E) Respiratory syncytial virus (18537)
Rhinovirus Human parainfluenza virus Type 2
Influenza A virus (A/TW/344/19 (H1N1)) Enterovirus Type 68
Influenza A virus (A/TW/1608/19 (H3N2)) Enterovirus Type 71
Influenza B virus (B/TW/2129/19 Victoria)
Reproducibility
An evaluation of the QuickProfile™ COVID-19 Antigen Test was conducted at three laboratories
using 48 coded samples. Testing was performed by training personnel with educational background
at three different locations. The study panel contained negative, high negative, low positive and
moderate positive samples. Each sample level was tested at each site by two operators.
The results obtained at each site agreed >99% with what was expected. The data analyses support
the hypothesis that QuickProfile™ COVID-19 Antigen Test is easily reproducible by different
operators and can be performed with little to no difficulty.
SPECIFICITY
Exogenous (Nasal spray product, common chemicals) and endogenous substances were
evaluated and did not interfere with the QuickProfile™ COVID-19 Antigen Test at the levels tested
below.
Interference substances
Testing Concentration Interference substances
Testing Concentration
Aspirin 20 mg/ml Oxymetazoline HCl 10 mg/ml
Dextromethorphan 10 mg/ml Phenylephrine HCl 100 mg/ml
Diphenhydramine HCl
5 mg/ml Saline nasal sprays 10%
Hemoglobin 20 mg/ml Whole blood 5%
Mucin 4.00% Ibuprofen 20 mg/ml
REFERENCES
1.
Chen N, Zhou M, Dong X, Qu J, Gong F, Han Y, et al. (15 February 2020). "Epidemiological and
clinical characteristics of 99 cases of 2019 novel coronavirus pneumonia in Wuhan, China: a
descriptive study". The Lancet. 395 (10223): 507–513.
2.
Wu C, Liu Y, Yang Y, Zhang P, Zhong W, Wang Y, et al. (February 2020). "Analysis of therapeutic
targets for SARS-CoV-2 and discovery of potential drugs by computational methods". Acta
Pharmaceutica Sinica B. doi:10.1016.
3.
"How to Protect Yourself & Others". Centers for Disease Control and Prevention (CDC). 8 April
2020. Archived from the original on 26 February 2020. Retrieved 9 April 2020.
4.
Biosafety in Microbiological and Biomedical Laboratories, 5th Edition. U.S. Department of Health
and Human Services, CDC, NIH, Washington, DC (2007).
5.
Henretig F.M. MD, King C. MD, Textbook of Pediatric Procedures, Chapter 123 – Obtaining
Biologic Specimens Williams and Williams (April 1997).
6.
The Clinical Virology Laboratory, Department of Laboratory Medicine at Yale:
http://info.med.yale.edu/labmed/virology/booklet.html.