Table 1.

Quantitative analysis of the number of the different mammary epithelial cell lines invaded by B. burgdorferi at different time intervals.

Time	Average Percentage of Cells Invaded by B. burgdorferi ± SEM
	MCF 10A	MDA-MB-231
24 h	36% ± 1%	89% ± 2%
48 h	52% ± 2%	92% ± 1%
72 h	61% ± 1%	96% ± 2%