Table 1. Origin of the Borrelia strains used in this study.

n°	Species	Geographical origin, Country	Anatomical origin	Associated symptoms
IBS6	B. garinii	Strasbourg, France	Skin biopsy of EMa	none
IBS17	B. afzelii	La Roche Guyon, France	Skin biopsy of EM	none
IBS19	B. burgdorferi ss	Metz, France	Skin biopsy of EM	none

^a Erythema migrans.