Table 1. Detection of IgM and IgG antibodies to B. burgdorferi in the examined groups of forestry workers, soldiers and healthy blood donors by serological examinations using two-step protocol, ELISA test and confirmatory Western blot method.

	Results of serological examinations	IgM + IgG +	IgM + IgG −	IgM +/− IgG +	IgM +/− IgG +/−	IgM + IgG +/−	IgM +/− IgG −	IgM − IgG +	IgM − IgG +/−	IgM − IgG −	Total number of samples	The obtained seroprevalence (%)
	I -group (forestry workers)
1.	ELISA	-	-	-	-	-	-	4	-	30	34
2.	Western blot	-	-	-	-	-	-	4	-	30	34
												11.76%
	II-group (soldiers)
1.	ELISA	1	2	-	-	1	1	2	1	29	35
2.	Western blot	1	1			1		3		29	35
												17.14%
	III-group (healthy blood donors)
1.	ELISA						1	2		32	35
2.	Western blot		1					2		32	35
												8.57%

Interpretation of the results: + positive result, − negative result, +/− borderline (equivocal) result-“grey zone“.

Seroprevalence was determined in relation to Western blot positivity.