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Table 1 Results of the screening of Cx. pipiens and Cx. torrentium for Wolbachia

From: Wolbachia prevalence in the vector species Culex pipiens and Culex torrentium in a Sindbis virus-endemic region of Sweden

Year

Species

Total tested

Culex pipiens

Culex torrentium

Tested

Positive

% positive

Tested

Positive

% positive

2010

93

92

98.9

49

0

0

142

2011

21

21

100

30

0

0

51

2012

208

190

91.3

71

0

0

279

2013

62

60

96.8

52

0

0

114

2014

6

5

83.3

2

0

0

8

2015

76

75

98.7

39

2

5.2

115

2016

30

30

100

30

0

0

60

2017

53

53

100

10

0

0

63

2018

127

126

99.2

10

0

0

137

Total

676

652

96.5

293

2

0.7

969

  1. The mosquitoes were collected in central Sweden between 2010 and 2018. The prevalence of Wolbachia in Cx. pipiens differed significantly in year 2012 from the 9-year average (Fisher’s exact test: P  =  0.00455, OR: 0.389 CI [0.198–0.778], Bonferroni-corrected P  =  0.041). The differences for all other years are non-significant