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Volume 17, Number 9—September 2011

Dispatch

Differential Risk for Lyme Disease along Hiking Trail, Germany

Dania RichterComments to Author  and Franz-Rainer Matuschka
Author affiliations: Author affiliation: Charité Universitätsmedizin Berlin, Berlin, Germany

Main Article

Table 1

Density of Ixodes ricinus ticks, prevalence of pathogenic Lyme disease spirochetes, and theoretic risk for exposure to such infected ticks along a trail, southern Germany, May–October 2006 and March–October 2007

Study site and tick stage
Mean no. ticks collected in 1 hour*
No. ticks examined
% Ticks infected with pathogenic spirochetes
Person’s risk for exposure in 1 hour†
Pasture
Nymph 11.8 104 3.8‡ 0.45
Adult
2.3
33
3.0§
0.07
Meadow
Nymph 87.2 188 21.8 19.01
Adult
10.4
58
17.2
1.79
Fallow land
Nymph 129.3 502 17.5 22.63
Adult 38.0 291 13.7 5.21

*Nymph or female.
†Theoretic risk for exposure, mean number of questing nymphs or female ticks infected by pathogenic genospecies of spirochetes that cause Lyme disease: Borrelia afzelii, B. garinii, B. bavariensis, B. burgdorferi s.s., B. spielmanii.
‡Significantly smaller (p<0.0001 by Fisher exact test).
§Comparison lacks statistical meaning because only 1 adult tick infected with pathogenic spirochetes was collected.

Main Article

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