"Smart Dressing" Detects Infection

A medical dressing changes in colour when it detects infection.

16:42 17 November 2015

Scientists have developed a “smart” medical dressing that changes colour when it detects infection. It works by releasing fluorescent dye form tiny capsules when toxins are given out by bacteria in a wound. Experts say that this will improve treatment for burn patients and can help minimise unnecessary antibiotic prescription that contributes to the growing problem of antibiotic resistance.

 

Doctors find it challenging to detect infections without removing the dressing. As a precaution, they prescribe antibiotics even before the infection is confirmed. However, taking antibiotics when there is no infection can lead to bacteria becoming resistant to antibiotics.

 

Dr Toby Jenkins, Reader in Biophysical Chemistry at Bath leading the project, explained: "Our medical dressing works by releasing fluorescent dye from nanocapsules triggered by the toxins secreted by disease-causing bacteria within the wound.

 

"The nanocapsules mimic skin cells in that they only break open when toxic bacteria are present; they aren't affected by the harmless bacteria that normally live on healthy skin.

 

"Using this dressing will allow clinicians to quickly identify infections without removing it, meaning that patients can be diagnosed and treated faster. It could really help to save lives."