Combatting bacterial and viral infections is getting tougher because of their growing resistance to drugs. Antibiotic drugs can no longer be counted on to conquer nasty bacteria. Antivirals don't always overpower the viruses. This is a huge problem but it is one that widely acknowledged and researched.

There's an additional medical challenge though, that matters a lot. Namely, drug-resistant fungi.

Yep, fungi.

It's a topic that doesn't get discussed much — and that worries Paul Verweij, professor of clinical mycology at Radboud University Medical Center in Nijmegen, the Netherlands. He says there's a "silence surge" in drug-resistant fungi and that it's mostly happening under-the-radar.

Fungicides are used to protect plants against fungal disease. Everything — watermelons, maize, wheat, flowers — use lots of fungicides. If we didn't use the fungicides, you'd probably have a yield loss maybe of 30% or 40%.

The problem is that the fungicides are quite similar to the drugs we give to patients. So the fungus becomes resistant to the fungicide and, at the same time, our medical azoles [a class of antifungal drugs] do not work as well anymore.