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Table 1 The minimum infection rate[42] of Ixodes ricinus ticks at the TBEV foci

From: Prevalence and phylogenetic analysis of tick-borne encephalitis virus (TBEV) in field-collected ticks (Ixodes ricinus) in southern Switzerland

  

Number of ticks sampled

Positive pools/total pools

Adults

Nymphs

Mix

Site

Year

Adult

Nymph

Larva

Adult

Nymph

Mixa

MIR

LL

UL

MIR

LL

UL

MIR

LL

UL

Raron

2010

875

872

2

11/135

0/45

2/21

1.26

0.63

2.24

0.00

0.00

0.42

0.74

0.39

1.27

Salgesch

2010

271

218

0

0/11

1/6

0/0

0.00

0.00

1.35

0.46

0.01

2.53

0.20

0.01

1.13

Lufu-Niedergesteln

2011

38

66

0

1/2

1/2

0/0

2.63

0.07

13.81

1.52

0.04

8.16

1.92

0.23

6.78

Raron

2011

156

124

0

2/30

0/8

0/0

1.28

0.15

4.55

0.00

0.00

2.93

0.71

0.08

2.56

Rittergut-Visp

2011

73

10

0

2/6

0/1

0/0

2.74

0.33

9.55

0.00

0.00

30.85

2.41

0.29

8.44

Salgesch

2011

320

1012

0

1/38

2/23

0/0

0.31

0.01

1.73

0.2

0.02

0.72

0.23

0.05

0.66

Brig

2013

397

213

1

1/19

0/4

0/1

0.25

0.01

1.40

0.00

0.00

1.72

0.16

0.01

0.91

Pletschen_Susten

2013

7

2

0

0/0

0/0

1/1

0.00

0.00

40.96

0.00

0.00

84.19

11.11

0.28

48.25

Raron

2013

261

239

0

0/14

0/6

1/1

0.00

0.00

1.40

0.00

0.00

1.53

0.20

0.01

1.11

Salgesch

2013

222

434

6

1/14

1/9

0/1

0.45

0.01

2.49

0.23

0.01

1.28

0.30

0.04

1.09

Total

 

2620

3190

9

19/269

5/104

4/25

0.73

0.44

1.13

0.16

0.05

0.36

0.48

0.32

0.7

  1. LL = lower 95% confidence limit.
  2. UL = upper 95% confidence limit.
  3. amixture of adults, nymphs and larvea.
  4. For each of the ten combinations of site and year, the tick sample sizes are shown for each stage (adult, nymph, larva). The proportion of TBEV-positive pools is shown for pools of three different stage compositions: adults, nymphs, and mixture (adults, nymphs, larvae). The MIR is shown separately for adults, nymphs, and mixture (adults, nymphs, larvae). The MIR and the 95% confidence limits are expressed as a percent.