Respiratory bacterium implicated in Alzheimer's deterioration

Scientists from Cedars-Sinai have discovered a potential link between the common bacterium Chlamydia pneumoniae and Alzheimer's disease. This bacterium, known for causing pneumonia and sinus infections, was found in elevated levels in the retinas and brains of Alzheimer's patients. Notably, the presence of Chlamydia pneumoniae coincides with increased amyloid-beta production, nerve cell death, and inflammation in the brain, especially in those with the APOE4 gene. The research emphasizes the eye's potential as a diagnostic tool and suggests addressing chronic infections might offer new treatment avenues. Published in Nature Communications, the study underscores the importance of targeting infection-related inflammation to potentially alleviate Alzheimer's symptoms.