Borrelia mayonii

A rare type of Lyme disease caused by Borrelia mayonii was detected for the first time in upstate New York, specifically in Herkimer County. Previously found only in Minnesota and Wisconsin, the bacteria was identified in an adult who had not recently traveled, with local ticks testing positive but no further spread detected. The case highlights differences in symptoms compared to the more common Borrelia burgdorferi strain.