There’s A New Smartphone Attachment That Will Test for HIV & Syphilis In 15 Minutes

Medical researchers from Columbia University have developed a low-cost smartphone accessory that can be plugged into a smartphone and used to quickly test for HIV and syphilis.

The mobile device tests for three infectious-disease markers in just 15 minutes by using a singer finger prick of blood.

The device replicates all mechanical, optical, and electronic functions of a lab-based blood test without requiring any stored energy, drawing all necessary power from the smartphone.

ScienceDaily has more:

It performs a triplexed immunoassay not currently available in a single test format: HIV antibody, treponemal-specific antibody for syphilis, and non-treponemal antibody for active syphilis infection.

Sia’s innovative accessory or dongle, a small device that easily connects to a smartphone or computer, was recently piloted by health care workers in Rwanda who tested whole blood obtained via a finger prick from 96 patients who were enrolling into prevention-of-mother-to-child-transmission clinics or voluntary counseling and testing centers. The work is published February 4 in Science Translational Medicine. Sia collaborated with researchers from Columbia’s Mailman School of Public Health; the Institute of HIV Disease Prevention and Control, Rwanda Biomedical Center; Department of Pathology and Cell Biology, Columbia University Medical Center; Centers for Disease Control and Prevention — Laboratory Reference and Research Branch, Atlanta; and OPKO Diagnostics.

“Our work shows that a full laboratory-quality immunoassay can be run on a smartphone accessory,” says Sia. “Coupling microfluidics with recent advances in consumer electronics can make certain lab-based diagnostics accessible to almost any population with access to smartphones. This kind of capability can transform how health care services are delivered around the world.”

Sia’s team wanted to build upon their previous work in miniaturizing diagnostics hardware for rapid point-of-care diagnosis of HIV, syphilis, and other sexually transmitted diseases. “We know that early diagnosis and treatment in pregnant mothers can greatly reduce adverse consequences to both mothers and their babies,” Sia notes.

They developed the dongle to be small and light enough to fit into one hand, and to run assays on disposable plastic cassettes with pre-loaded reagents, where disease-specific zones provided an objective read-out, much like an ELISA assay. Sia estimates the dongle will have a manufacturing cost of $34, much lower than the $18,450 that typical ELISA equipment runs.