Fig. 3

Seroprevalence of IgG antibodies in single infection and coinfection with Rickettsia spp. and B. burgdorferi s.l. in adult residents of north-eastern Poland. chi2 test, p < 0.001, a vs. b - statistically significant difference between groups; a vs. a or b vs. b - no statistically significant (post-hoc Bonferroni test); HR - the high-risk group (forest workers); LR - the low-risk group - residences of Olsztyn city.