A simple urine test can now detect Lyme disease just three days after a tick bite, weeks before traditional blood tests can see it.
Current Lyme disease tests are notoriously unreliable because they look for the body's immune response rather than the bacteria itself. This new test detects a specific piece of the bacteria's cell wall that is actively shed into the patient's urine. It correctly identified 88 percent of infected people before they even developed the antibodies that standard tests require. Early detection is critical because the disease is much easier to cure in its first few days. This tool could prevent thousands of cases of chronic Lyme by getting patients on antibiotics immediately.
A direct, urine-based test to diagnose acute Lyme disease using actively secreted peptidoglycan as a biomarker
medRxiv · 10.64898/2026.05.05.26352475
Lyme disease is a growing and prominent human health problem caused by a group of spirochaetal bacteria that belong to the Borrelia genus. Persistent Lyme disease infection produces a multi-system disorder that may result in severe arthritis, carditis, neurological problems, and even death. Preventing severe disease requires immediate treatment, but current approaches to diagnose Lyme disease are indirect, serology-based assays that may fail early in infection. All Lyme disease-causing Borrelia