Table 1.

Borrelia burgdorferi ss N40 is present in organs but not in blood of C3H/HeN mice at 40 days after intradermal or intraperitoneal inoculation. Borrelia spirochetes were detected by culturing sub-samples of tissue biopsies in BSK media. Tissue biopsies that tested negative using the culture method were re-tested using qPCR.

Inoculation route	Mouse organ tested
	Blood	Heart	Joint	Ear skin	Serology
Intradermal	0% (0/13)	62% (8/13)	92% (12/13)	92% (12/13)	100% (13/13)
Intraperitoneal	0% (0/9)	66% (6/9)	100% (9/9)	100% (9/9)	100% (9/9)