Correctly diagnosing malaria is crucial. But in practice, it often goes awry, as Agbana explains. "If a child has a fever, for instance, the community health worker may surmise that the patient has malaria just by feeling the child's temperature with their hand. But all too often the diagnosis is incorrect, and the wrong medication is administered, either because the child's particular strain of malaria has not been identified, or the kid doesn't have malaria at all."
Under a microscope, malaria shows up in infected red blood cells. A dark spot surrounded by a lighter ring is a tell-tale sign. The World Health Organisation recommends the inspection of 100 microscopy stills of one person's sample to make a correct diagnosis. So even with a microscope, diagnosing malaria takes time and effort.
A small glass ball in front of the camera lens can transform a smartphone into a modest microscope (8.5 X). The built-in zoom function increases the magnification sufficiently enough to detect the rings in an infected blood sample.
Edmund Optics representative, Niklas Saxen from Finland, said the OSMD was awarded the Silver Award because of its novelty and that the finding fits well in the company’s philosophy of saving the world through optics.
It's still early days for the malaria detection tool. Agbana has plenty of ideas to improve the current set-up. For instance, he'd like to be able to detect infected cells without staining the sample. He is also considering using a fluorescent dye to make detection easier and more reliable. Additionally, he is looking into ways of enlarging the field of vision to reduce the required number of stills.
- Read more about the tool.