Table 1. Comparison of isothermal amplification PCR/ESI-MS assay and two-tier serology for the detection of early Lyme disease on initial patient visit.

		Early two-tier Serology
		Pos	Neg	Total
Early Lyme Disease	IA/PCR/ESI-MS +	8	5	13
	IA/PCR/ESI-MS -	6	2	8
	Total	14	7	21
Control group	IA/PCR/ESI-MS +	0	0	0
	IA/PCR/ESI-MS -	1	43	44
	Total	1	43	44