What breaks down biofilms?

How Biofilms Are Broken Down to Treat Infections

When bacteria team up and form a slimy, protective layer on surfaces—like tissues or medical devices—they create what’s called a biofilm. These structures make infections much harder to treat because they shield bacteria from the immune system and reduce the effectiveness of antibiotics.

So, what breaks down biofilms? While antibiotics and other antimicrobials are the go-to tools, they often struggle to fully penetrate the biofilm matrix. This means standard treatments may not be enough. Still, certain antibiotics—especially when used in higher doses or combined with other agents—can disrupt the biofilm structure and kill the bacteria inside.

Researchers have also found that some antimicrobials work better in combination. For example, pairing an antibiotic with an enzyme that degrades the biofilm’s extracellular matrix can significantly improve results. One such enzyme, dispersin B, breaks down the sugars that hold the biofilm together, exposing the bacteria to attack.

Beyond pharmaceuticals, physical methods like debridement—removing infected tissue—or ultrasound treatments can help break up biofilms, especially in chronic wounds or on implants. In medical settings, preventing biofilm formation on catheters or prosthetics is often just as important as removing them once they’ve formed.

The challenge lies in the resilience of biofilms. They’re not just clusters of bacteria; they’re complex communities that communicate and adapt. This makes treating biofilm-related infections a multi-pronged effort—targeting both the protective layer and the microbes within.

While antibiotics remain a cornerstone of treatment, the future likely lies in combination therapies: using antimicrobials alongside biofilm-disrupting agents to clear infections more effectively. As our understanding grows, so does the potential for smarter, more targeted solutions to this persistent medical problem.