Breaking Down Biofilm: Why Lyme Can Be Hard to Resolve

Takeaways

• Borrelia burgdorferi, the microbe that causes Lyme, can shift between multiple forms; one treatment doesn’t work for all forms.

• One such form is biofilm, a protective matrix that shields microbes from the immune system and conventional treatments.

• Biofilm may help explain why some people experience lingering symptoms long after tick exposure.

• A knowledgeable healthcare practitioner can help you explore a more comprehensive approach to addressing Lyme-related symptoms.

Lingering symptoms are a frustratingly common aspect of Lyme-related health challenges — especially when symptoms persist or return after treatment. Lyme disease is the most common vector-borne illness in the U.S., with nearly half a million infections diagnosed annually (actual infections are likely far higher). Researchers believe a protective microbial matrix called biofilm may help explain why recovery isn't always straightforward.

A Microbe that Plays by Its Own Rules

Lyme disease is caused by Borrelia burgdorferi, a bacterium transmitted through the bite of an infected tick. What makes Borrelia particularly interesting to researchers is its adaptability. Unlike simpler bacteria, Borrelia can shift between multiple physical forms depending on the conditions it encounters in the body.

Borrelia’s three primary forms:

• Spirochetes — the active, corkscrew-shaped form that Borrelia typically takes during infection. This is the form most conventional treatments are designed to target.

• Round bodies (also called cyst forms) — a dormant, self-protective state that Borrelia can shift into when it senses a threat, such as antibiotic exposure.

• Biofilm — a structured community that Borrelia may form, encasing itself in a protective matrix that can be highly resistant to both the immune system and conventional treatments such as antibiotics.

So why do these forms matter? Because each form responds differently to treatment. An approach that effectively addresses the spirochete form, for example, may have limited impact on round bodies or biofilm. This shape-shifting ability is one reason Lyme can be so difficult to fully resolve.¹

What Is Biofilm — and Why Is It So Effective?

Biofilm isn't unique to Borrelia — it's a survival strategy found across many species of bacteria, and it's been studied extensively in a range of health contexts. When bacteria form a biofilm, they attach to a surface (such as body tissue) and produce a protective coating around themselves. Think of it as a self-built shelter. Plaque is a well-known example of biofilm.

Inside biofilm, microbes are:

• Shielded from immune cells that would otherwise respond to them

• Significantly more resistant to conventional treatment, including antibiotics

• Able to persist in a low-activity state that makes them hard to detect

Research by microbiologist Dr. Eva Sapi, professor of biology at the University of New Haven, has been central to documenting this behavior in Borrelia. Her work has helped establish that Borrelia burgdorferi does form biofilm in tissue — and that these biofilm communities can include other organisms working together to reinforce their collective defenses.²

In laboratory studies, biofilm-form Borrelia demonstrated remarkable resistance even after prolonged exposure to antibiotics, while other forms showed greater susceptibility.¹ 

This finding has helped researchers better understand why lingering symptoms can persist even after rounds of conventional treatment.

Could Biofilm Help Explain Persistent Symptoms?

Standard Lyme testing looks for immune markers in the blood. But if Borrelia is sheltered within biofilm, it may not generate the kind of immune response those tests are designed to detect. This is one reason researchers have proposed that standard testing doesn't always tell the complete story — and why some people receive negative results while still experiencing symptoms.²

This diagnostic gap has led scientists to explore additional testing approaches and, importantly, to reconsider what a truly comprehensive wellness strategy for Lyme-related health challenges might look like.

A More Complete Approach: The Case for Addressing Biofilm

Because biofilm-form Borrelia behaves so differently from other forms, researchers have argued that strategies addressing only one form at a time may leave treatment incomplete. This insight has driven growing interest in multi-faceted approaches that address all three morphological forms simultaneously.

Botanical research has been part of this conversation, with researchers like Dr. Sapi and her team conducting laboratory studies examining the activity of botanical extracts against multiple forms of Borrelia, including the biofilm form. Their findings suggested that certain botanical extracts showed activity across Borrelia's different morphologies, including forms that demonstrated resistance to antibiotic-only approaches.³

What This Means for Your Journey

Understanding biofilm changes the way many people think about their Lyme-related health journey. It stops framing lingering symptoms as a mystery and starts recognizing them as proof of a microbe that adapts, persists, and fights back. And it points toward something equally powerful: a wellness strategy comprehensive enough to meet that challenge head-on.

If you're navigating persistent Lyme-related symptoms, consider discussing biofilm with your healthcare provider. Questions worth raising include:

• Whether your current approach addresses multiple forms of Borrelia

• If more comprehensive testing options might be appropriate 

• What strategies might complement your existing care

The science of biofilm is still evolving, but it's already reshaping how researchers and practitioners think about Lyme. And that's a meaningful step forward for everyone navigating this complex health condition.

References

1. Sapi E., Kaur N., Anyanwu S., Luecke D.F., Datar A., Patel S., Rossi M., Stricker R.B. Evaluation of in-vitro antibiotic susceptibility of different morphological forms of Borrelia burgdorferi. Infect. Drug Resist. 2011;4:97–113.

2. Sapi E. et al. Characterization of biofilm formation by Borrelia burgdorferi in vitro. PLoS ONE. 2012;7(10):e48277.

3. Datar A., Kaur N., Patel S., Luecke D., Sapi E. In vitro effectiveness of Samento and Banderol herbal extracts on the different morphological forms of Borrelia burgdorferi. Townsend Lett. 2010;7:1–4.

4. Theophilus PAS, Sapi E. In vitro effect of Peruvian antimicrobial agents on Borrelia burgdorferi. Published 2013.