 Tel:+86-755-26890807
Email: sales@goldsite.com.cn
News Detail
Home / News / Company News / Goldsite Statement on Omicron Variants

Goldsite Statement on Omicron Variants

Author: Site Editor     Publish Time: 2021-11-29      Origin: Site


微信截图_20220223155533

Goldsite Statement on Omicron Variants

Regarding SARS-COV-2 Antigen Kit (Colloidal Gold), The Ability to detect the new SARS-CoV-2 variants of concern

November 29th, 2021


With the pandemic outbreak of COVID-19, multiple SARS-CoV-2 virus variants have emerged, including B.1.1.7 lineage (Alpha), B.1.351 lineage (Beta), P.1 lineage (Gamma), B.1.617.2 lineage (Delta), B.1.1.529 (Omicron), etc.

Most of the mutations in these variants occur in the viral surface proteins (e.g. Spike proteins), while few mutations occur in the nucleocapsid (N) because the N protein is essential for virus survival and is too conserved to change.

SARS-CoV-2 Antigen Kit (Colloidal Gold) manufactured by Goldsite Diagnostics Inc. is intended to detect the N protein in human nasal swab specimens. Both the two antibodies used on the test kit target the viral nucleocapsid (N) protein.

Since it is strictly prohibited in China to perform experiments using the live SARS-CoV-2 virus, we used the recombinant nucelocapsid protein of the variants to the test whether the kit performance would be affected by the new variants.

Study Summary:

The recombinant nucleocapsid protein (NP) (wild type, delta version, omicron version) of the SARS-CoV-2 was serially diluted with the extraction buffer, to make a series of dilutions with final test concentration shown below. 70 μL of the dilutions was added directly for testing. All dilutions were tested in triplicates. The results were as follows:

Wild type NP

Delta variant NP

Omicron variant NP

Concentration

Result

Concentration

Result

Concentration

Result

100 ng/mL

3/3 Positive (+)

100 ng/mL

3/3 Positive (+)

100 ng/mL

3/3 Positive (+)

25 ng/mL

3/3 Positive (+)

25 ng/mL

3/3 Positive (+)

25 ng/mL

3/3 Positive (+)

10 ng/mL

3/3 Positive (+)

10 ng/mL

3/3 Positive (+)

10 ng/mL

3/3 Positive (+)

2.5 ng/mL*

3/3 Positive (+)

2.5 ng/mL

3/3 Positive (+)

2.5 ng/mL

3/3 Positive (+)

*The limit of detection (LoD) of the test has previously been determined to be 2.5 ng/mL using the wild type NP.

Study Conclusion:

The preliminary results showed that the test has the same sensitivity (limit of detection, LoD) when detecting the wild-type, the delta variant, and the omicron variant's nucelocapsid proteins, which were 2.5 ng/mL.

Based on preliminary testing results above and the comparison analysis, we hereby declared that SARS-CoV-2 Antigen Kit (Colloidal Gold) performs the same (i.e. no impact) when detecting the SARS-CoV-2 variants including but not limited to the following variants (next page).


Variant

Lineage

First documented in

Alpha

B.1.1.7

UK

Beta

B.1.351

South Africa

Gamma

P.1

Brazil

Delta

B.1.617.2

India

Omicron

B.1.1.529

mainly South Africa

Lambda

C.37

Peru

Mu

B.1.621

Columbia



Vairants including but not limited to the above ones can be detected by SARS-CoV-2 Antigen (Colloidal Gold).

Goldsite Diagnostics Inc. will continue to monitor the impact of the circulating variants on the performance of the kit.


Goldsite Diagnostics Inc.


Related Products

content is empty!

Goldsite Diagnostics Inc., founded in 1999, is a leading Chinese diagnostics manufacturer specializing in in-vitro diagnostics devices and reagents.

Quick Links

Product Links

Get in touch

    (+86)-755-26890807

        (+86)-755-26897973
   sales@goldsite.com.cn

 

Copyright ©  2021 Goldsite Diagnostics Inc., All rights reserved.  Sitemap