Université de Neuchâtel

Investigations on the Mode and Dynamics of Transmission and Infectivity of Borrelia burgdorferi Sensu Stricto and Borrelia afzelii in Ixodes ricinus Ticks

Crippa, Mara ; Rais, Olivier ; Gern, Lise

In: Vector Borne Zoonotic Diseases, 2002, vol. 2, no. 1, p. 3-9

Borrelia burgdorferi sensu lato (sl), the agent of Lyme disease, is transmitted to the host during the blood meal of Ixodes ticks. In most unfed ticks, spirochetes are present in the midgut and migrate during blood feeding to the salivary glands, from which they are transmitted to the host via saliva. In the present study, the efficiency of Ixodes ricinus ticks to transmit...

Université de Neuchâtel

Tick bites in a Lyme borreliosis highly endemic area in Switzerland

Hügli, Delphine ; Moret, Jacqueline ; Rais, Olivier ; Moosmann, Yves ; Erard, Philippe ; Malinverni, Raffaele ; Gern, Lise

In: International Journal of Medical Microbiology, 2009, vol. 299, no. 2, p. 155-160

The duration of tick feeding is an important indicator to evaluate the risk of Borrelia burgdorferi sensu lato transmission, which increases considerably with the blood meal duration. This blood meal duration may be estimated from scutal index, the ratio between body length (idiosoma) and scutum width. For the estimation of blood meal duration in Ixodes ricinus, nymphal and adult...

Université de Neuchâtel

Prevalence of Borrelia burgdorferi Sensu Lato in Ticks Collected from Migratory Birds in Switzerland

Poupon, Marie-Angèle ; Lommano, Elena ; Humair, Pierre-François ; Douet, Véronique ; Rais, Olivier ; Schaad, Michael ; Jenni, Lukas ; Gern, Lise

In: Applied and Environmental Microbiology, 2006, vol. 72, p. 976-979

The prevalence of ticks infected by Borrelia burgdorferi sensu lato on birds during their migrations was studied in Switzerland. A total of 1,270 birds captured at two sites were examined for tick infestation. Ixodes ricinus was the dominant tick species. Prevalences of tick infestation were 6% and 18.2% for birds migrating northward and southward, respectively. Borrelia...