Health Technologies

AI diagnostic test accurately identifies respiratory viruses in minutes

Pictura Bio co-founders Nicolas Shiaelis and Dr Nicole Robb have developed a world-first diagnostic test powered by AI that can identify known respiratory viruses such as influenza and COVID-19 within five minutes from just one nasal or throat swab.

The ground-breaking tech combines molecular labelling, computer vision and machine learning to create a universal diagnostic imaging platform that looks directly at a patient sample and can identify which pathogen is present in a matter of seconds.

Current tests are either lab-based and time-consuming or fast and less accurate.

They are also limited, with a lateral flow test, for example, only testing for one infection.

This means that illnesses are spread as infected people wait for results, or because they are unaware they are infected.

The findings, published in peer-reviewed, scientific journal ACS Nano, demonstrate how machine learning can significantly improve the efficiency, accuracy and time taken to not only identify different types of viruses, but also differentiate between strains.

This could help better control the spread of respiratory infections and alleviate pressure on the NHS and healthcare staff while reducing medical waste.

Dr Nicole Robb, scientist and co-founder of Pictura Bio, said:

“Cases of respiratory infections in winter 2022/23 have hit record-breaking highs, increasing the number of people seeking medical help.

“This combined with the COVID-19 backlog, staff shortages, tighter budgets and an ageing population puts the NHS and its workforce under immense and unsustainable pressure.

“Pictura Bio’s simplified method of diagnostic testing is quicker and more cost-effective, accurate and future proof than any other tests currently available.

“If we want to detect a new virus, all we need to do is retrain the software to recognise it, rather than develop a whole new test.

“Our findings demonstrate the potential for this method to revolutionise viral diagnostics and our ability to control the spread of respiratory illnesses.”

Oxford University scientists Shiaelis and Robb collaborated with the John Radcliffe Hospital to evaluate the new method, which works much like facial recognition software, but for germs.

Preliminary research showed that this test could identify the COVID-19 virus in patient samples.

But to develop this further, they wanted to determine whether the test could be used to diagnose multiple respiratory infections.

Researchers began the study by labelling viruses in over 200 clinical samples from John Radcliffe Hospital.

Images of labelled samples were captured and processed by custom machine-learning software that is trained to recognise specific viruses.

The software analyses a virus’ fluorescence labels, which show up differently for every virus because of variations in their surface size, shape and chemistry.

The results show the technology is able to rapidly identify different types and strains of respiratory viruses, including flu and COVID-19, within five minutes and with >97 per cent accuracy.

The scientists formed Pictura Bio to further develop the technology and are now looking for further investment to accelerate development and get it to the front line of healthcare.

Lead-author of the publication, co-founder and DPhil post-grad researcher at the University of Oxford, Nicolas Shiaelis, said:

“It is inevitable that other COVID-like viruses will emerge.

“This reinforces the need for more advanced diagnostic testing technology so that we can reduce the impact of new viruses on public health and the NHS.”



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