Avacta launch COVID-19 laboratory test

Avacta Group is set to launch a high-performance test for the SARS-CoV-2 spike protein to support global efforts to combat COVID-19.

Enzyme linked immunosorbent assays (ELISAs) are very common research tools used to detect and quantify a target of interest in a wide range of samples.

Using the same Affimer reagents that are incorporated into its rapid coronavirus saliva test being developed with Cytiva, Wetherby-based Avacta has developed in-house a high performance ELISA laboratory test to detect the SARS-CoV-2 virus.

Avacta will make the ELISA test available as a kit so that researchers globally can use it in their own laboratories to support research into the coronavirus.

The Affimer-based ELISA test is capable of detecting the coronavirus spike protein in laboratory samples down to very low concentrations.

An evaluation of the ELISA carried out with The Liverpool School of Tropical Medicine using SARS-CoV-2 virus samples shows that it can detect as little as a few thousand virus infectious units per millilitre of sample.

This is typical of the levels found in infectious COVID-19 patients’ saliva whether they are symptomatic or not. Highly infectious COVID-19 patients can have many thousands or millions of times more spike protein in their saliva than this.

The test is also highly specific to the SARS-CoV-2 virus with no cross-reactivity against other closely related coronavirus spike proteins.

Avacta plans to supply the SARS-CoV-2 spike protein ELISA reagent kit directly and is also in active discussions with potential OEM partners and distributors globally.

“I am delighted with the outstanding performance of the Affimer-based ELISA test developed in-house by Avacta and that we will shortly make this powerful laboratory research tool available to support global research efforts to study the virus and develop ways to combat the pandemic,” said Dr Alastair Smith, CEO of the AIM listed Avacta Group.

“Avacta remains focused on the much larger opportunity of the saliva-based coronavirus antigen rapid test that we are developing with Cytiva and which is now in the process of technology transfer to our manufacturing partners.

“The excellent analytical performance of the ELISA test is very encouraging with regards to the anticipated clinical performance of the rapid test and I look forward to starting the clinical validation with the first pilot batch of rapid tests as soon as possible.”

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