LIVERMORE, United States — More than 90% of Uganda’s population faces the risk of malaria, with the country losing more than $500 million yearly to treatment and prevention. The 2024 the World Health Organization (WHO) census shows an estimated 13.2 million malaria cases — that is 29% of the population — and more than 16,204 estimated deaths.
Paper Centrifuges Used to Diagnose Malaria in Uganda
Because malaria symptoms are the same as flu symptoms, healthcare workers diagnose malaria by spinning a blood sample at high speeds. The centrifugal force separates the blood into plasma, the buffy coat and red blood cells. Since malaria-infected cells are less dense than regular red blood cells, they settle at the bottom of the buffy coat layer and just above the red blood cells. Healthcare workers then examine a sample from this area under a microscope to detect malaria.
Manu Prakash and his team of scientists at Stanford developed a solution to combat the inaccessibility of heavy, expensive centrifuges and microscopes — the paper centrifuge and paper microscope — in hopes of managing malaria cases and removing the need for highly specialized medical professionals.
Prakash was inspired to create this accessible technology after a visit to Uganda in 2013. He saw a clinical centrifuge being used as a doorstop because the facility had no electricity. The experience motivated him to create easy-to-use, human-powered technology that could solve the issues clinical centrifuges present: they are heavy, expensive, use electricity, take time and require professional training to operate. Thus, the paperfuge was born.
Improving Healthcare Access
Creating affordable technology is only the first step toward improving healthcare access. MTN Uganda is helping bring these innovations to communities by distributing medical technologies, including the paperfuge and paper microscope, through its “21 Days of Y’ello Care” program. The health hubs created through this initiative can give communities greater access to diagnostic tools, helping healthcare workers identify illnesses without relying on expensive equipment or reliable electricity.
- Decreases the Cost of Diagnosing Malaria by 99.99%: A clinical centrifuge and microscope kit most often used to diagnose malaria costs, on average, $10,353.95. These machines are heavy and large, making them hardly accessible to the mountainous regions of Uganda. The paperfuge, however, costs 18 cents, weighs two grams and is completely waterproof. Paired with a 50-cent paper microscope, it brings the cost of effective malaria diagnosis, without the use of electricity, to just 68 cents.
- Anyone Can Use It: Uganda has roughly 154,000 to 159,000 healthcare workers, which is not even half of the country’s actual need. In rural regions, this means no healthcare expertise and inaccessible treatment. The paperfuge and paper microscope offer a user-friendly design and cause minimal fatigue. The redesign of the classic whirligig toy requires only minimal training. Patients have the potential to diagnose themselves, removing the reliance on specialized doctors. It also runs exclusively on human power, so it requires no electricity.
- Can Process a Sample in Two Minutes: A clinical centrifuge takes around 45 minutes to fully process a sample, with 30 minutes dedicated to clotting and 15 minutes to spinning. The paperfuge processes a blood sample in just two minutes, making it extremely efficient.
- Spins 10 Times Faster Than a $10,000 Centrifuge: A paperfuge rotates at 125,000 rpm, generating 30,000 g of centrifugal force using just hand power, compared to a clinical centrifuge that spins at 15,800 rpm. This means the paperfuge spins roughly 10 times faster, contributing to its quicker processing time.
- Can Diagnose More Than Just Malaria: The paperfuge does not stop at malaria. It also detects African sleeping sickness, anemia, tuberculosis and HIV/AIDS. About 1.5 million people in Uganda live with HIV/AIDS, and 96,000 fall ill with tuberculosis annually. By expanding access to testing, the paperfuge can help healthcare workers identify diseases earlier and connect patients with treatment sooner. Its low cost and lack of electricity requirements also give rural clinics a practical solution for diagnosing multiple diseases without relying on expensive laboratory equipment.
The paper centrifuges used to diagnose malaria in Uganda provide an efficient and accessible diagnostic tool. When healthcare workers identify infections early, patients can begin treatment sooner and reduce the spread of malaria and other diseases. Combined with paper microscopes, these low-cost tools continue to improve healthcare in communities with limited medical resources.
– Julia M Kozin
Julia is based in Livermore, CA, USA and focuses on Technology and Politics for The Borgen Project.
Photo: Flickr