Tables

Table 1. Babesia microti infection in nymphal Ixodes ricinus ticks as determined by polymerase chain reaction, eastern Switzerland

Sampling point or line Pool 1 Pool 2 Pool 3 Pool 4 Pool 5 No. of pools No. of ticks

B1 11 11 12 -- -- 3 34

B1-2 10 10 10 -- -- 3 30

B2 4 3 -- -- -- 2 7

B2-3 3 3 3 -- -- 3 9

B3 3 -- -- -- -- 1 3

B3-4 8^a 8 -- -- -- 2 16

B4 1 -- -- -- -- 1 1

B4-C2 5 5 4 5 -- 4 19

C1 1 -- -- -- -- 1 1

C1-2 9 9 9 9 -- 4 36

C2 7 7 5 -- -- 3 19

C2-3 5 5 5 5 5 5 25

C3 10 -- -- -- -- 1 10

C3-4 4 -- -- -- -- 1 4

C4 4 -- -- -- -- 1 4

C4-5 7 6 -- -- -- 2 13

C5 8 7 6 -- -- 3 21

C5-D1 8 7 7 8 -- 4 30

D1 5 5 6 -- -- 3 16

D1-2 8 7 -- -- -- 2 15

D2 6 6 -- -- -- 2 12

D2-3 5 5 5 6 6 5 27

D3 4 -- -- -- -- 1 4

D3-4 6 6 5 -- -- 3 17

D4 11 11 10 -- -- 3 32

D4-5 3 -- -- -- -- 1 3

D5 0 -- -- -- -- 0 0

Total 64 408

Sampling point or line	Pool 1	Pool 2	Pool 3	Pool 4	Pool 5	No. of pools	No. of ticks
B1	11	11	12	--	--	3	34
B1-2	10	10	10	--	--	3	30
B2	4	3	--	--	--	2	7
B2-3	3	3	3	--	--	3	9
B3	3	--	--	--	--	1	3
B3-4	8^a	8	--	--	--	2	16
B4	1	--	--	--	--	1	1
B4-C2	5	5	4	5	--	4	19
C1	1	--	--	--	--	1	1
C1-2	9	9	9	9	--	4	36
C2	7	7	5	--	--	3	19
C2-3	5	5	5	5	5	5	25
C3	10	--	--	--	--	1	10
C3-4	4	--	--	--	--	1	4
C4	4	--	--	--	--	1	4
C4-5	7	6	--	--	--	2	13
C5	8	7	6	--	--	3	21
C5-D1	8	7	7	8	--	4	30
D1	5	5	6	--	--	3	16
D1-2	8	7	--	--	--	2	15
D2	6	6	--	--	--	2	12
D2-3	5	5	5	6	6	5	27
D3	4	--	--	--	--	1	4
D3-4	6	6	5	--	--	3	17
D4	11	11	10	--	--	3	32
D4-5	3	--	--	--	--	1	3
D5	0	--	--	--	--	0	0
Total						64	408

Table 2. Global and local prevalence estimates of Babesia microti infection in nymphal Ixodes ricinus ticks as determined by polymerase chain reaction, eastern Switzerland

Point estimate (%) 95% confidence interval
MLE^a, overall 3.6 0.2 to 9.06
MLE, section B 1.04 0.10 to 9.01
MLE, section C 0.77 0.08 to 8.47
MLE, section D 10.99 6.17 to 17.71
MLE, sections B,C 0.82 0.61 to 2.65
MLE, sections C,D 5.25 2.96 to 10.43
^aMLE (maximum likelihood estimate) of the point estimates are shown with 95% bootstrap confidence limits.

	Point estimate (%)	95% confidence interval
MLE^a, overall	3.6	0.2 to 9.06
MLE, section B	1.04	0.10 to 9.01
MLE, section C	0.77	0.08 to 8.47
MLE, section D	10.99	6.17 to 17.71
MLE, sections B,C	0.82	0.61 to 2.65
MLE, sections C,D	5.25	2.96 to 10.43

Table 3. Reactivity of sera tested against Babesia microti as determined by indirect immunofluorescent assay

Titer No. of sera (%)
<1:64 391 (98.7)
1:64 1 (0.3)
1:128 1 (0.3)
1:256 1 (0.3)
1:512 2 (0.5)
Total 396 (100.0)

Titer	No. of sera (%)
<1:64	391 (98.7)
1:64	1 (0.3)
1:128	1 (0.3)
1:256	1 (0.3)
1:512	2 (0.5)
Total	396 (100.0)