Chlamydia pneumoniae—a common bacterium that causes pneumonia and sinus infections—can linger in the eye and brain for years and may aggravate Alzheimer’s disease, according to a study from Cedars-Sinai. Published in Nature Communications, the discovery suggests this bacterium can amplify Alzheimer’s disease and points to potential interventions including inflammation-limiting therapies and early antibiotic treatment.
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Common bacteria discovered in the eye linked to cognitive decline
February 2, 2026
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Just one hour a day of social media scrolling on your smartphone can cause eye strain
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