Spirochete involved in Lyme disease.Encyclopedia Entry for Borrelia :Borrelia miyamotoi Disease - Borrelia miyamotoi (G- bacterium; spirochete)Encyclopedia Entry for Borrelia :Borrelia. May be caused by: Anorexia nervosaADHDBipolar disorderDementiaDepressionObsessive compulsive disorderRheumatoid arthritisSchizophreniaInformation from Marcello Allegretti.