TABLE 1.

Overview of B. burgdorferi sensu lato inoculation experiments^a

Spirochete	Growth medium	Expt I		Expt II		Expt III		Total no. of mice (n = 142 [7])
		Dose (CFU)/mouse	No. of mice (n = 48 [0])	Dose (CFU)/mouse	No. of mice (n = 36 [2])	Dose (CFU)/mouse	No. of mice (n = 58 [5])
B. burgdorferi sensu stricto N40	BSK-II	106	6	106	10	106	5	21
B. garinii PBi	BSK-II	106	6	106	10	6.0 × 105	5	21
B. afzelii PKo	MKP	106	6	-	0	106	17	23
B. afzelii Slovakia	BSK-II	106	6	-	0	7.6 × 105	15	21
B. valaisiana VS116	BSK-II	106	6	-	0	-	0	6
B. valaisiana Rio6	BSK-II	-	0	106	8	-	0	8
B. spielmanii A14S	BSK-II	106	12	-	0	106	6	18
B. lusitaniae	BSK-II	106	6	106	8	106	10	24

^aFor experiments I and III, the collection of murine serum samples occurred on days 28, 56, and 63 postinoculation, and mice were sacrificed on day 63. For experiment II, the collection of murine serum samples occurred on days 28, 56, and 84 postinoculation, and mice were sacrificed on day 90. n, Total number of mice (values in brackets indicate the number of negative-control mice). -, No inoculation with this spirochete.