Breaking Biofilms: Army 2nd Lt. Michael Ainsworth Advances Research on Antibiotic-Resistant Infections at USU
As the first West Point graduate to directly enter USU’s M.D./Ph.D. program, Army 2nd Lt Michael Ainsworth applies an Academy-bred discipline to the fight against antibiotic-resistance pathogens.
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2nd Lt. Michael Ainsworth’s research at USU involves identifying specific enzymes that can be used as a prophylactic agent to impede the maturation of antibiotic-resistant biofilms. (USU photo) |
March 19, 2026 by Hadiyah Brendel
Bacteria don’t always fight alone. In the body, they can build fortified communities known as biofilms—shielded structures that can withstand even the most powerful antibiotics. At the Uniformed Services University (USU), Army 2nd Lt. Michael Ainsworth is working to break through those defenses, developing new ways to stop dangerous infections before they take hold.
Ainsworth’s research targets a formidable enemy in biofilms. While many imagine bacteria as lone, free-floating organisms, they often congregate into complex, slimy structures that adhere to surfaces such as heart valves, medical implants, and combat wounds.
"A biofilm can act as a physical barrier that protects bacteria from the immune system, antibiotics, and even cleaning agents," Ainsworth explained. This shield is so effective that it can render bacteria up to 1,000 times more resistant to treatment. The most powerful antibiotics are useless if they can’t penetrate the barrier.
A Tactical "Prophylactic" Strike
Ainsworth’s thesis focuses on a two-pronged approach: preventing these fortresses from forming and characterizing their hidden structures. Specifically, he works with "ESKAPE" pathogens—aggressive bacteria responsible for persistent combat wound infections–before they can finalize their defenses. Uninterrupted, an immature biofilm can form in four hours, and grow to maturity in less than 20 hours.
His model utilizes a biological hijack strategy. By identifying specific enzymes—the tools the bacteria employ to detach from a colony and spread—they can be combined to create a prophylactic agent to instead impede the biofilm’s maturation.
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Army 2nd Lt. Michael Ainsworth (Photo credit: Tom Balfour, USU) |
In a clinical setting, these enzymes can serve in a locking solution for implanted devices, such as central line catheters. By bathing medical lines in an enzyme solution, healthcare providers can potentially prevent the stealth buildup of hospital-acquired infections, potentially saving the patient from needing surgical debridement and excessive rounds of antibiotics.
On the battlefield, a medic packs a fresh wound with a rapid clotting gauze. If infused with Ainsworth’s enzymes, the gauze slows the infection clock. By dismantling immature biofilms in the critical four-hour window after injury, the treatment could ensure the bacteria remain vulnerable to standard antibiotics.
"We’ve shown that these enzymes can 'rescue' antibiotics," Ainsworth noted. "By hindering the biofilm's maturation, we increase the bacteria's susceptibility to the treatments we already have."
Now in his fourth year of the seven-year M.D./Ph.D. track, Ainsworth applies a soldier’s discipline to the precision of a microbiologist in the laboratory. He conducts his research under the mentorship of Dr. Kristi Frank, professor of Microbiology and Immunology, whose lab is recognized for its tactical approach to infectious disease, with a focus on applied microbiology and force health protection.
Frank says Ainsworth’s research has “opened up new avenues of investigation” in her lab.
“Using a system that simulates how infections develop in patients enhances the clinical relevance of 2nd Lt. Ainsworth’s research to identify novel therapeutics for catheter infections, thus supporting our goal of improving medical care for military members and their families,” she says.
Together, this work reflects a broader shift in how military medicine approaches infection—moving from reactive treatment to early, targeted intervention. For Ainsworth, the drive behind that shift is both scientific and personal, shaped by a path that brought him from military training grounds to the research lab.
Forged at the Point: Leading the Charge Against Biofilms
For many, the path to medical school can be all but straightforward, filled with later-in-life pivots, rounds of applications, and life’s hurdles. And while Army 2nd Lt. Michael Ainsworth also carved a non-traditional path to USU, his was a bit different. A West Point graduate, Ainsworth is the first to navigate a pipeline from the U.S. Military Academy directly into the M.D./Ph.D. program– a feat that eventually required authorization from the Secretary of the Army.
"I relied on great advisors from the Academy to advocate for me," Ainsworth recalled.
Ainsworth attributes his transition into the rigorous M.D./Ph.D. program to his roots at West Point. Navigating the demanding "dual-hatted" life of a student-officer requires a level of discipline he says was instilled by the Academy’s unique environment.
"The whole experience of the Academy is developing you into not just a student or a soldier, but a well-rounded leader," Ainsworth explained. "It teaches you to think through problems and understand them at both the base level and how they connect to everything else. Those connections actually feed into how you're tackling [a problem], and I think that's absolutely necessary no matter where you go."
This ability to view microscopic challenges through a strategic lens is a hallmark of his time in the lab. Whether he is managing the long hours required for biofilm characterization or helping coordinate the university’s second annual Quiz Bowl, Ainsworth relies on the independence and problem-solving skills he honed as a cadet.
Ainsworth adds that he’s also found a unique support system at USU. He describes a culture where the traditional competitive pressures of medical school are replaced by a shared mission.
"The camaraderie here is incredible," Ainsworth noted. "Students are always willing to share study materials or jump into a study group. The faculty are just as invested; it’s common to get a detailed email reply or a professor scheduling extra time just to ensure you've mastered a complex topic."
The Road Ahead
As he nears the end of his graduate phase, Ainsworth is eager to return to clinical rotations. For him, the science is always about the soldier.
"I’m looking forward to experiencing patient care and applying the research I’ve done over the last few years to help not just patients as a whole but this patient. I think it's really important to have that perspective,” he explains.
By breaching the hull of bacterial biofilms, Ainsworth isn't just winning a scientific battle; he's ensuring that when a service member is wounded, the medical arsenal remains effective enough to meet the threat head on.
