Link: BBC NEWS
Dr Ryan Donnelly, of Queen's School of Pharmacy, said: "The ability of light to kill bacteria was first discovered about 100 ago, but because of the antibiotic era it was largely forgotten.
"It is only recently with the emergence of antibiotic-resistant bacteria that this has come to the fore again and many different groups involved in treating the likes of MRSA are trying to use this technology now."
A new gel is used to put a drug where it is needed.
Dr Paul McCarron, also of Queen's, said: "I saw my son, Niall, who was playing with kiddies' slime and I was just looking at the way it flowed between his fingers.
Dr Paul McCarron got inspiration from kiddies' play slime
"I thought it had the correct flow properties, to press into a leg ulcer for example. In other words, it can be pressed in and it will slowly flow to fill the cavity.
"More importantly, whenever you remove it, it can be removed all in one go."
The gel deposits a drug into the wound or ulcer and then it is lifted out, leaving behind the drug.
The drug makes MRSA and other bugs sensitive to light - much more so than the human cells, so when a powerful light is shone on the wound, it is the bugs like MRSA that will be killed.