Table 1.

Prevalence of antibodies against Borrelia burgdorferi in farmers from eastern and central Poland depending on geographic location

Voivodeship	Locality	Number of farmers examined	Reactions with antibodies belonging to IgM class				Reactions with antibodies belonging to IgG class				Positive or borderline reactions in one or both classes
			Positive		Borderline		Positive		Borderline
			Number	Percent %	Number	Percent %	Number	Percent %	Number	Percent %	Number	Percent %
Lublin	Lublin	1141	131	11.5	50	4.5	118	10.3	10	0.9	276	24.2
	Biała Podlaska	120	17	14.2	6	5.0	24	20.0	1	0.8	44	36.7
	Biłgoraj	59	7	11.9	3	5.1	6	10.2	0	0.0	15	25.4
	Chełm	120	10	8.3	6	5.0	7	5.8	3	2.5	24	20.0
	Kraśnik	317	27	8.5	16	5.0	36	11.4	4	1.3	72	22.7
	Puławy	103	10	9.7	4	3.9	14	14.0	2	1.9	24	23.3
	Radzyń Podlaski	114	22	19.3	4	3.5	19	16.7	2	1.8	37	32.5
	Włodawa	150	38	25.3	13	8.7	36	24.0	3	2.0	76	50.7
	Zamość	99	8	8.1	1	1.0	16	16.2	2	2.0	24	24.2
Total		2223	270	12.2	103	4.6	276	12.4	27	1.2	592	26.6
Masovian	Gostynin	150	20	13.3	9	6.0	22	14.7	1	0.7	46	30.7
	Siedlce	329	34	10.3	19	5.8	55	16.7	5	1.5	97	29.5
	Węgrów	182	16	8.8	3	1.7	25	13.7	2	1.1	42	23.1
Total		661	70	10.6	31	4.7	102	15.4	8	1.2	185	28.0
Podlaskie	Hajnówka	103	21	20.4	2	1.9	21	20.4	0	0.0	37	35.9
	Augustów	150	9	6.0	7	4.7	19	12.7	0	0.0	31	20.7
	Kolno	120	8	6.7	2	1.7	17	14.2	0	0.0	25	20.8
	Mońki	99	7	7.1	7	7.1	10	10.2	0	0.0	18	18.2
	Siemiatycze	106	11	10.4	6	5.7	21	19.8	0	0.0	33	31.1
	Suwałki	135	17	12.6	6	4.4	25	18.5	3	2.2	43	31.9
Total		713	73	10.2	30	4.2	113	15.6	3	0.4	187	26.2
Total in all voivodeships		3597	413	11.5	164	4.6	491	13.7	38	1.1	964	26.8

Variation depending on locality, assessed by χ ² test: χ² = 59.599, P < 0.000001, variation highly significant