Université de Neuchâtel

Density of questing Ixodes ricinus nymphs and adults infected by Borrelia burgdorferi sensu lato in Switzerland: spatio-temporal pattern at a regional scale

Jouda, Fatima ; Perret, Jean-Luc ; Gern, Lise

In: Vector Borne Zoonotic Diseases, 2004, vol. 4, no. 1, p. 23-32

Lyme borreliosis, the most important vector-borne disease in the Northern hemisphere, causes health problem for populations in endemic areas. In the present study, the density of questing Ixodes ricinus ticks and their infection with Borrelia burgdorferi sensu lato (sl) was examined in 11 areas located on the Swiss Plateau and in an alpine valley. From 1999 to 2001, free-living...

Université de Neuchâtel

Ixodes ricinus Density, and Distribution and Prevalence of Borrelia burgdorferi Sensu Lato Infection Along an Altitudinal Gradient

Jouda, Fatima ; Perret, Jean-Luc ; Gern, Lise

In: Journal of Medical Entomology, 2004, vol. 41, no. 2, p. 162-169

In this study, we measured the phenology of Ixodes ricinus ticks and their infection with Borrelia burgdorferi sensu lato (sl) simultaneously along an altitudinal gradient to assess the impact of climate on the phenology of ticks and on their infection with B. burgdorferi sl. From 1999 to 2001, free-living I. ricinus ticks were collected monthly by flagging vegetation...

Université de Neuchâtel

Distribution and prevalence of Borrelia burgdorferi sensu lato in Ixodes ricinus ticks of canton Ticino (Switzerland)

Jouda, Fatima ; Crippa, Mara ; Perret, Jean-Luc ; Gern, Lise

In: European Journal of Epidemiology, 2003, vol. 18, p. 907-912

Free-living Ixodes ricinus ticks were collected from 12 different sites of canton Ticino, south of the Alps (Switzerland). Each tick was examined for the presence of Borrelia burgdorferi sensu lato (sl), the etiologic agent of Lyme borreliosis using direct fluorescent antibody assay, and isolation of the bacteria. Borreliae were characterized by PCR followed by RFLP. The...