Most of us think of a wound as something temporary. A cut finger while cooking, a scraped knee from a childhood fall, or a blister from a new pair of shoes. We clean it, cover it up and get on with our lives, confident it will heal in a matter of days or weeks. For thousands of people across Wales, that isn’t what happens. Some wounds remain open for months or even years. These chronic wounds affect around 6% of the Welsh population and include diabetic foot ulcers, leg ulcers and pressure sores. Far more than an inconvenience, they can be life-changing. Living with a chronic wound often means persistent pain, difficulty walking, regular clinic appointments and frequent dressing changes. Many people become reluctant to leave the house because of discomfort, reduced mobility or concerns about odour and leakage. The result can be social isolation, loneliness and a significant impact on mental wellbeing.
So why don’t these wounds heal? The simple answer is that the body becomes trapped in a vicious cycle. Normally, when we are injured, inflammation helps protect us from infection while new tissue repairs the damage. Once the job is done, the inflammation subsides and healing continues. In a chronic wound, that process gets stuck. Instead of helping, prolonged inflammation begins to damage the surrounding tissue and prevents the wound from closing.
An open wound also creates an opportunity for microbes to move in. Some come from the environment, others from our own skin or gut. While contamination doesn’t always lead to infection, chronic wounds provide ideal conditions for certain microbes to establish themselves for the long term. These infections are very different from the ones most of us are familiar with. Rather than living as individual cells, bacteria and fungi can form organised communities known as biofilms.
You can think of a biofilm as a microscopic neighbourhood: different microbes living together, sharing resources and protecting one another. Together they produce a slimy protective layer that acts like a shield, helping them survive attacks from both the immune system and antimicrobial treatments. This helps explain why chronic wound infections can be so frustratingly difficult to treat. Dressings containing antimicrobial agents such as silver or iodine may help, but they are often battling against highly organised microbial communities that have had months or years to establish themselves. The growing problem of antimicrobial resistance can make the situation even more challenging.
Despite the scale of the problem, there is reason for optimism. Researchers across Wales are working to tackle chronic wounds from several different angles. Some are developing entirely new technologies, such as “smart” dressings that can detect early signs of infection, while others are revisiting older treatments such as maggot therapy, and natural products including ancient medicinal plants. One of the biggest frustrations is that success in the laboratory does not always translate into success for patients. A treatment may appear highly effective when tested in a Petri dish, only to perform poorly when faced with the complexity of a real chronic wound. Researchers are therefore focusing not only on developing new treatments but also on building better ways of testing them. By recreating the conditions found inside chronic wounds more faithfully, scientists hope to identify which therapies are genuinely likely to improve healing before they reach the clinic.
We are fortunate in Cardiff and across South Wales to have a strong community working to support people living with chronic wounds. From the Welsh Wound Innovation Centre and university research groups developing the next generation of wound treatments, to local businesses creating innovative technologies and products, there is a huge amount of activity focused on improving wound care. Importantly, support extends beyond science and medicine. Initiatives such as ANCLE Café provide opportunities for people with chronic wounds to meet others facing similar challenges, helping to combat the isolation that often accompanies long-term illness. Together, these organisations are showing that improving wound care is about more than healing wounds – it is about improving lives.
Author byline/profile:
Dr Sarah E. Hooper is a microbiologist and Reader in Microbiology and Infection at Cardiff Metropolitan University. Her research explores the microbes that cause chronic wound infections and how communities of bacteria, known as biofilms, contribute to delayed healing and treatment failure. She is particularly interested in developing realistic laboratory models that can accelerate the discovery and testing of new wound therapies, helping to improve outcomes for people living with long-term wounds.
LinkedIn: www.linkedin.com/in/sarah-e-maddocks
