Researchers have created a simple Covid-19 testing lab that fits into a backpack providing a cheap and effective solution for low income or remote areas.
In a new study, published in PLOS ONE, scientists from Queen Mary University of London show that their lab-in-a-backpack approach is as effective as commercially available Covid-19 tests at detecting SARS-CoV-2.
The compact kit is relatively inexpensive to make, costing $51 in total. It could offer an alternative testing solution for resource-poor countries or remote areas with little access to well-equipped testing labs or trained personnel to process samples.
The testing kit is based on a simple, non-invasive Covid-19 LAMP test and uses low-cost hardware, including a centrifuge made from recycled computer hard drives, called a CentriDrive, to process samples.
The LAMP test is a widely accepted alternative to the commonly used PCR test, has a similar sensitivity but unlike the PCR test does not require temperature cycling, only a single high temperature to amplify any potential virus RNA. This allows the test to be performed with only minimal equipment and reagents. Because the LAMP test uses saliva samples, it also avoids the need for invasive, uncomfortable nasal swabs. However, the high costs of commercially available LAMP tests, as well as the expensive lab equipment required to run them, means that current commercial approaches aren’t suitable for remote locations, or in-home testing.
Professor Stoyan Smoukov, Professor of Chemical Engineering at Queen Mary University of London, said: “We are excited for the potential of this mobile lab to do Covid-19 tests and the possibility to democratise access to inexpensive testing technology. It is made possible by our philosophy of creating low-cost instruments whenever possible from advances in electronics, or existing instruments.
Emily Lin, lead author of the study, said: “In this study, using the LAMP test method in combination with a low-cost centrifuge, we provided an inexpensive, rapid and accurate method for the detection of COVID-19. It will not only provide a viable and inexpensive test kit for regions such as Africa, where innovative solutions are particularly important during the Covid-19 pandemic. It can also be used in resource-rich areas, for example, in high school classrooms to demonstrate how to test for COVID-19.”
Umar Razzaque, who led the development of the CentriDrive during his undergraduate and Masters’ projects at Queen Mary under the supervision of Professor Smoukov, said: “I’m grateful for the opportunity to have worked, as an undergraduate, on technology which could result in a real-world impact. I believe the experience and skills gained whilst developing the CentriDrive, and working in our amazing team, helped land my first job as a systems engineer. The project was driven by the hopes of making a positive change and I’m honoured to see this article published in a leading open access scientific journal.”
According to the researchers, next steps will include making the kit instructions even more understandable so that people can use them regardless of their experience or language, as well as validating the kit with real patient samples. So, whilst this approach holds promise, further work is needed before the system can be implemented in real-world environments, Professor Smoukov said.
Regular testing is a key part of global efforts to manage the Covid-19 pandemic, and it is hoped low-cost testing solutions like this could help improve access to fast and effective Covid-19 testing worldwide
“Reuse is a high-value option for energy and materials sustainability, and we are glad that rather than exporting electronics waste to developing countries, we can export ways to empower people and turn waste computer hard drives into a centrifuge. The Covid-19 test is a timely application, but we also believe with this CentriDrive kit people could perform a large array of routine blood and urine tests, providing a centrifuge away from central hospital facilities,” said Professor Smoukov.
“Combining open access science with open-source hardware lets everyone in the world test this for themselves with minimal resources. We are also providing this technology to the innovators and entrepreneurs in the Pan-African Innovation Competition Queen Mary is running to inspire inventors in Africa. Perhaps this royalty-free invention will let people tinker and educate themselves and others on how different blood or virus tests work. Or the simplicity and cost advantage may inspire people to base a company around it.”
Low-cost innovation creates affordable products and solutions by adopting innovative ways of using existing technologies. At Queen Mary, our researchers and students are working on several low-cost innovation projects and in 2020 researchers from our School of Engineering and Materials Science launched a competition in collaboration with the AFSIN network in Africa around low-cost technologies, which aimed to identify and develop the next generation of young scientists, leaders, and entrepreneurs from the continent.
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