Table 2 Prevalence of Rickettsia spp. in I. ricinus ticks by developmental stage, year, subregion and habitat, north-eastern Poland.

From: Molecular and serological evidence of spotted fever group rickettsiae and Borrelia co-infection in Ixodes ricinus and humans in north-eastern Poland

  

No. of tested ticks

Rickettsia-positive

p-value**

n/% * (95% CI)

Stage

Nymphs

3259

212/6.5a (5.68–7.41)

< 0.001

Females

381

43/11.3b (8.29–14.90)

Males

450

53/11.8b (8.95–15.12)

Year

2016

2188

183/8.4a (7.24–9.60)

0.03

2017

1902

125/6.6b (5.50–7.78)

Subregion

West

1563

104/6.7a (5.47–8.00)

0.003

Central

1351

129/9.5b (8.03–11.24)

East

1173

75/6.4a (5.05–7.93)

Habitat

Forest

1750

127/7.3a (6.09–8.57)

0.567

Ecotone

2340

181/7.7a (6.68–8.89)

Total

4090

308/7.5 (6.74–8.38)

 
  1. *for nymphs Minimum Infection Rate (MIR) is given (5 nymphs per isolate); **chi2 test, p < 0.05; a vs.bstatistically significant difference between groups; a vs.a or b vs.bno statistically significant difference (post -hoc Bonferroni test).
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