Table 1.

Borrelia burgdorferi s.l. infection in ticks infesting blackbirds resident in NE Poland

Year	No. of birds examined	No. of birds infested by ticks/prevalence (%)	No. of ticks collected (larvae; nymphs)/intensity (ticks per bird) [±SD]	No. of ticks with B. burgdorferi s.l. (larvae; nymphs)/prevalence (%)	No. of birds infested by ticks with B. burgdorferi s.l./prevalence (%)
1996	11	10/90.9	58 (23; 35)/5.3 [±6.2]	5 (0; 5)/8.6	3/27.3
1997	14	11/78.6	59 (9; 50)/4.2 [±5.6]	4 (0; 4)/6.8	3/21.4
2005	14	13/92.8	199 (71; 128)/14.2 [±13.6]	8 (1; 7)/4	4/28.6
2006	15	15/100	158 (15; 143)/10.5 [±7.1]	9 (1; 8)/5.7	5/33.3
2011	14	13/92.8	103 (10; 93)/7.4 [±9.9]	21 (0; 21)/20.4	5/35.7
2012	10	8/80	46 (3; 43)/4.6 [±4.3]	14 (2; 12)/30.4	4/40
Total	78	70/89.7	623 (131; 492)/8 [±9.1]	61 (4; 57)/9.8 (3; 11.6)	24/30.8