Tag Archives: Alzheimer’s

Bacterium in Your Lungs May Be Attacking Your Brain

Chlamydia pneumoniae is a common respiratory bacterium responsible for millions of cases of pneumonia and sinus infections each year. Most people recover without incident, but a growing body of research suggests the bacterium doesn’t always leave. In a February 2026 study, published in Nature Communications, researchers at Cedars-Sinai found that Chlamydia pneumoniae can linger in the eye and brain for years, potentially aggravating Alzheimer’s disease. Scientists found that greater amounts of the bacterium were associated with more severe brain damage and worse cognitive decline, with elevated bacterial levels especially common in individuals carrying the APOE4 gene variant.

The mechanism is alarming. The bacterium can infect the olfactory and trigeminal nerves and reach the brain within 72 hours, while also dysregulating key pathways involved in Alzheimer’s disease pathogenesis.

The federal government has taken notice. The Senate Appropriations Committee’s FY 2026 spending bill proposed an increase of $100 million for Alzheimer’s disease and related dementias research at NIH National Institute on Aging. Researchers hope this increased funding hope will accelerate investigation into infection-driven neurodegeneration. What once seemed like an ordinary respiratory bug may prove to be one of the brain’s most dangerous long-term adversaries.

From Supporter to Survivor: Legacy of America’s 40th President

On what would have been his 115th birthday, TBIontheHill honors Ronald Reagan, America’s 40th President of the United States:

President Ronald Reagan left an enduring mark on the brain injury community when he signed Proclamation 5262 in October 1984, designating National Head Injury Awareness Month. This landmark action acknowledged the 700,000 Americans hospitalized annually for head injuries and called for greater research and support.

Reagan himself experienced traumatic brain injury firsthand. On July 4, 1989 – just months after leaving office – the 78-year-old was thrown from a bucking horse at a friend’s ranch in Mexico. The fall caused a subdural hematoma, a dangerous blood clot between the brain and skull. After initial treatment, doctors discovered a second clot requiring brain surgery at the Mayo Clinic in September 1989.

Because the accident occurred after his presidency, it did not affect his time in office. However, Nancy Reagan later wrote that she believed the severe head injury “hastened the onset” of her husband’s Alzheimer’s disease, diagnosed in 1994. Research supports this connection, as moderate brain injuries increase Alzheimer’s risk 2.3 times, while severe injuries raise it 4.5 times.

Reagan’s presidency transformed America – ending the Cold War, spurring economic growth, and restoring national optimism. His personal experience with brain injury adds poignant context to his earlier advocacy, creating a legacy for millions affected by neurological conditions.