As we mark the first submissions to the £10 million Longitude Prize, we explore how we might diagnose when and which antibiotics are needed to help tackle antibiotic resistance.

The distinguished Longitude Committee has come up with the below prototypes to demonstrate some of the types of diagnostic tests that could potentially solve the prize. The point of care test must:

• provide a result within 30 minutes
• be affordable to everyone who needs it
• be accurate to inform treatment decisions
• be easy to use in any location, anywhere in the world

You still have time to compete in the Longitude Prize - the submission dates are every four months over the next five years (the next is 31 May 2017). However, the winner of the Longitude Prize could be found at any time...