SARS-CoV-2 Variants Detection Test Kit

Screens for the SARS-CoV-2 virus and simultaneously identifies and differentiate all the new mutating COVID-19 variants.

CE/IVD Marked Product

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Research Use Product

The QuantiVirus™ SARS-CoV-2 Variants Detection Test identifies seven important variants of SARS-CoV-2, including Alpha, Beta, Gamma, Delta, Delta Plus, Omicron, Epsilon, and Kappa. Using samples from sputum, saliva, and upper respiratory specimens, the test goes through RNA extraction and RT-qPCR steps to identify different variants on commonly used qPCR instruments. The test can also be adapted to high-throughput platforms if necessary. With a Limit of Detection of 100 copies/mL, the QuantiVirus™ SARS-CoV-2 Variants Detection Test has been validated using hundreds of clinical samples we have collected since January 2021.

Looking for a testing service? Our CLIA lab is also available for the COVID-19 testing! Learn more >

Product Highlights

CE/IVD Marked
Screen for infection of SARS-CoV-2 viruses in general
Identifies and differentiate all the new mutating COVID-19 variants, especially variants of concerns (VoCs)
Enhanced sensitivity (100 copies/mL) and specificity powered by DiaCarta’s proprietary XNA Technology
Samples types: Sputum, saliva, nasopharyngeal, and oropharyngeal
Compared to NGS, QuantiVirus^TM SARS-CoV-2 Variants Detection Kit based on qPCR is faster, more reliable, and less expensive

Accurately Detects the Omicron Variant

Read our recent press release HERE

Validated Machines

Bio-Rad CFX384; Thermo Fisher (ABI) QuantStudio 5

COVID-19 Hotline

Email: support@diacarta.com

Phone #: +1 800-246-8878

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Notes and Comments

Which Variants of Concerns (VoCs) are Targeted?

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What is VoCs?

According to the WHO working definition, the variants of concerns (VoCs) refer to the virus variants with at least one of the three characteristics: (1) increase in transmission or worsening of the epidemiology; (2). Increase in virulence (3). Decrease in effectiveness of public health and availability of diagnostics and vaccines. WHO listed Alpha, Beta, Gamma, Delta, and Omicron as current VOCs.

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VoCs and Significance of Detection

Accurately detecting different variants helps understand the infection transmission and severity of the health threat, and provides useful information for the variants spread in different regions and implementation of public health guidelines.

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The Delta Variant

COVID-19 Variants of Concerns (VoC), especially the Delta variant, has significantly increased the infection rate and severity of the disease. With the increase of new round of infection by the Delta variant in many countries, the world is panicking again as vaccination does not stop the infection. Very quickly, the Delta variant has taken over the other variants and become the dominant variant in different countries.

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The Omicron Variant

While the Delta variant is still dominating, a new variant named Omicron Variant has appeared first in Africa and is now detected in over 20 counties. The new variant recently classified as VOC by the WHO has also a fast transmission rate. Although some observations suggest that the new variants have milder symptoms in patients, it is too short to tell the potential danger to the human community.

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List of Mutations Detected by QuantiVirus™ SARS-CoV-2 Variants Detection Kit

The QuantiVirus™ SARS-CoV-2 Variants Detection Kit is a real-time RT-PCR test intended for the qualitative detection of D614G, N501Y, T478K, L452R, K417N, and K417T mutations in the S gene of the SARS-CoV-2 virus. With different combinations of these mutations, we could detect all the major VOC.

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The Detection of the VoCs

Detection of the variant is more meaningful than just knowing the infection status. In addition, knowing which variant is circulated in a local area may help guide public policies in prevention and protection. For instance, detection of the Omicron variant particularly at this moment will tell

How widespread is the new variant?
Will this variant dominate and replace the Delta variant?
How the symptoms or potential danger of this variant will be compared to the Delta variant?
If there are any factors that one variant may become dominant in certain regions or populations but not in others?

Product Configuration

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Kit Components

Primer/Probe Mix
XNA Mix
One Step qRT-PCR Master Mix
Positive Control, Negative Control, Extraction Control, and No Template Control

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Pack Size

48-reaction per kit, 480-reaction per kit

Workflow of QuantiVirus™ SARS-CoV-2 Variants Detection Kit

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Sampling Methods

Sputum, saliva, and upper respiratory specimens taken using nasal or oropharyngeal swabs.

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Viral RNA Extraction

Isolation of viral RNA with sample lysis or extraction to obtain qPCR templates. Can be adapted to high-throughput platform.

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RT-qPCR

Kit performance is validated on three most popular qPCR instruments: ABI Quant-Studio 5 (Thermo), CFX384 (Bio-Rad), and ABI 7500 Fast Dx (Thermo).

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XNA Technology

The QuantiVirus™ SARS-CoV-2 Variants Detection Kit is based on xenonucleic acid (XNA) mediated PCR clamping technology. Compared to other qPCR probe-based kits, the addition of an XNA, whose sequence is a complete match to the wild-type DNA, to a PCR reaction, blocks amplification of wild-type DNA allowing selective amplification of mutant DNA, assuring the specificity and avoiding false-positive results.

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Why qPCR Genotyping, not Sanger or Whole Genome Sequencing?

Genotyping by qPCR has advantages for known variants compared to the sequencing technologies because it is fast and focuses on only a few mutations. Sequencing on the other hand is good for discovering new variants or confirming genotyping methods by qPCR if necessary. Sequencing, in general, takes much more time and is less cost-effective compared to genotyping by qPCR and when variants are known.

Who will Benefit from the QuantiVirus™ SARS-CoV-2 Variants Detection Kit?

Public health professionals who want to know the spreading of the Omicron variant compared to the presence of the Delta variant

Research clinical labs who want to study how the different mutations will affect the patients’ health

Pharmaceutical companies who are planning to develop the vaccine to the new Omicron variant may want to profile the vaccine recipients

Clinical Evaluation and Clinical Sample Testing

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Clinical Evaluation

Clinical evaluation using the three qPCR instruments [ABI QuantStudio 5 (Thermo), CFX384 (Bio-Rad), and ABI 7500 Fast Dx (Thermo)] show 100%, 100% and 95% agreement with the spiked sputum sample at 1xLoD (1×100 copies/mL), and 100% agreement at all other concentrations including 200 copies/mL, 300 copies/mL, and 500 copies/mL. All the 30 negative samples were tested negative.

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Clinical Sample Testing

Using the QuantiVirus™ SARS-CoV-2 Variants Detection Kit, we screened 374 positive samples and 102 negative samples collected in our own lab. For all the positive and negative samples testing for N501Y or D614G variant, the clinical sensitivity was 100.0% (95% CI: 98.7%-100.0%), specificity was 100% (95% CI: 95.5%-100.0%), PPV was 100.0% (95% CI: 97.4%-100.0%) and NPV was 100.0% (95% CI: 95.5%-100.0%).

Assay Performance

The assay performance was evaluated for intra- and inter-assay reproducibility, inter-instrument reproducibility, cross-reactivity with 21 known viruses.

Ordering Information

US Customer - Research Use Only Product

Product Name: QuantiVirus™ SARS-CoV-2 Variants Detection Kit

48-Reaction Kit Catalog Number: DC-11-0057R
480-Reaction Kit Catalog Number: DC-11-0058R

Outside US Customer: CE Marked Product