Smartphone dongle detects HIV and syphilis markers in 15 minutes – This article by Nick Lavars for Gizmag may be of interest to subscribers. Here is a section:

Now, a team of researchers from New York's Columbia University have unveiled a cheap, plug-in smartphone accessory they say can detect both HIV and syphilis. More specifically, it uses disposable plastic cassettes loaded with reagents to detect HIV antibodies, treponemal-specific antibody for syphilis, and non-treponemal antibodies for active syphilis infection.

The researchers say the device can replace the traditional method of testing for such disease markers, a process called an enzyme-linked immunosorbent assay (ELISA) that involves equipment costing upwards of US$18,000. In comparison, they estimate the manufacturing cost of the accessory to be just $34. 

Eoin Treacy's view

We are all now familiar with the role of 3-D printers in rapid prototyping and how this is contributing to the speed with which innovative solutions are being delivered. The invention of rapid, cheap diagnostics has the potential to greatly enhance the quality and cost of medical care around the world in much the same way. This should be particularly beneficial for poorer countries, not least in Africa, and may contribute to their chances of achieving economic development.