Episode 545: Using the Human Eye to Detect Early Alzheimer’s and Infection-Induced Brain Changes – Dr. Sean Miller (Yale)

Overview

This special episode of the Tick Boot Camp Podcast was recorded live at the 2nd Annual Alzheimer’s Pathobiome Initiative (AlzPI) and PCOM Symposium in collaboration with Pathobiome Perspectives. Hosted by Ali Moresco in partnership with Nikki Schultek, Executive Director of AlzPI, the conversation brings the Tick Boot Camp mission of exploring infection-associated chronic illness (IACI)—including Lyme disease and other tick-borne infections—to the global Alzheimer’s and neuroimmunology research community.

Tick Boot Camp co-founders Matt Sabatello and Rich Johannesen partnered with Ali and Nikki to highlight leading scientists connecting infection, immune dysfunction, and cognitive decline. This episode features Dr. Sean Miller, a neuroscientist and co-investigator in the Logan Lab with a primary appointment at Yale School of Medicine, who is developing ways to non-invasively detect Alzheimer’s-like pathology through the eye.

Guest

• Sean Miller, PhD
• Co-Investigator, Logan Lab / Yale School of Medicine

Dr. Sean Miller completed pre-doctoral work at Harvard Medical School, earned his PhD from Johns Hopkins University, and completed post-doctoral training at Stanford University. His research focuses on neurodegeneration, neuroglia, and early diagnostic strategies for Alzheimer’s and related diseases.

At the AlzPI & PCOM Symposium, Dr. Miller presented evidence showing that SARS-CoV-2 (COVID-19) infection can accelerate Alzheimer’s-like pathology and that these changes can be detected non-invasively through retinal imaging. His findings suggest that amyloid-beta, a protein long associated with Alzheimer’s disease, may also serve as part of the brain’s antimicrobial defense system—trapping pathogens like a mesh or biofilm, but leading to damaging plaque buildup when overproduced.

Key Discussion Points

Dr. Miller describes how the COVID-19 virus can act as an infectious trigger for neuroinflammation and amyloid buildup, how the eye provides a unique window into the brain, and why early detection is essential to preventing neuron death. He shares how his lab’s AI-enhanced retinal imaging research at Yale Eye Center is identifying amyloid and tau deposits in patients with long COVID-related brain fog—opening the possibility of routine eye exams doubling as early Alzheimer’s screening tools.

He explains potential therapeutic strategies, such as limiting amyloid production during infection flare-ups and enhancing clearance mechanisms afterward to reduce chronic plaque formation. The conversation also explores his scientific journey—from designing Alzheimer’s drugs at Harvard and Johns Hopkins to realizing the need for early disease detection during his postdoc at Stanford—and how the pandemic inspired his focus on infection-induced neurodegeneration.

“We believe neurons are exposed to pathogens in the central nervous system and respond by secreting amyloid-beta to trap them. Excessive plaque buildup from repeated or severe infections may be what drives long-term neurodegeneration.” — Dr. Sean Miller

Why It Matters

Dr. Miller’s research connects infectious disease, ophthalmology, and neurology, providing a revolutionary new method to screen for early Alzheimer’s-like changes non-invasively through the human eye. His work suggests that infections like COVID-19 may trigger the same protective—but damaging—immune responses implicated in chronic conditions such as Alzheimer’s disease and infection-associated cognitive decline.

About the Event

The interview took place at the 2nd Annual Alzheimer’s Pathobiome Initiative (AlzPI) and Philadelphia College of Osteopathic Medicine (PCOM) Symposium, held on October 3, 2025, at Ohio University in Dublin, Ohio. The event brought together more than 20 global researchers exploring how microbes, the microbiome, and the immune response contribute to Alzheimer’s, dementia, PANS/PANDAS, and infection-associated chronic illnesses (IACI).

Tick Boot Camp partnered with Ali Moresco and Nikki Schultek to share the voices of researchers advancing the field of infection-associated chronic illness. This episode is part of a multi-part Tick Boot Camp series highlighting how pathobiome and microbiome science are transforming the understanding of Lyme disease, infection, and neurodegeneration.

Learn More

• Learn more about the Alzheimer’s Pathobiome Initiative (AlzPI)

• Listen to Tick Boot Camp Podcast episodes, including Episode 406: Pathobiome – An Interview with Nikki Schultek and Episode 101: The Young Gun – An Interview with Alex (Ali) Moresco discussed in this interview.