June 27, 2026

Borrelia mayonii: A Rare Cause of Lyme Disease Can Lyme disease be caused by more than one bacterium? Yes. Although Borrelia burgdorferi causes the vast majority of Lyme disease cases in North America, another species—Borrelia mayonii—can also cause Lyme disease in humans. First identified in 2016, Borrelia mayonii is transmitted by the same black-legged tick […]

Lyme Bacterial Fragments May Persist After Infection Lyme bacterial fragments may persist in tissues after infection and continue to stimulate the immune system, according to new research examining cell-wall material from Borrelia burgdorferi, the bacterium that causes Lyme disease. The study adds to a growing body of research suggesting that persistent Lyme disease symptoms may