Université de Neuchâtel

Three-dimensional flight tracking shows how a visual target alters tsetse fly responses to human breath in a wind tunnel

Gurba, Alexandre ; Harraca, Vincent ; Perret, Jean-Luc ; Casera, Steve ; Donnet, Stéphane ; Guerin, Patrick M

In: Physiological Entomology, 2012, vol. 37, no. 3, p. 250-257

Tsetse flies Glossina spp. (Diptera; Glossinidae) are blood-feeding vectors of disease that are attracted to vertebrate hosts by odours and visual cues. Studies on how tsetse flies approach visual devices are of fundamental interest because they can help in the development of more efficient control tools. The responses of a forest tsetse fly species Glossina brevipalpis (Newstead)...

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

Appetence behaviours of the triatomine bug Rhodnius prolixus on a servosphere in response to the host metabolites carbon dioxide and ammonia

Otálora-Luna, Fernando ; Perret, Jean-Luc ; Guerin, Patrick M.

In: Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, 2004, vol. 190, no. 10, p. 847-854

A combination of 1,000 ppm CO2 plus 30–40 ppb NH3 in an air stream induced Rhodnius prolixus nymphs walking on a servosphere to perform a series of appetence behaviours. Shortly after the onset of stimulation the nymphs turned sharply upwind towards the source of the chemostimuli (within 13±9 s) from mostly downwind and crosswind walks in the air stream alone. The...

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

Early detection of Borrelia burgdorferi sensu lato infection in Balb/c mice by co-feeding Ixodes ricinus ticks

Hu, Chang Min ; Cheminade, Yves ; Perret, Jean-Luc ; Weynants, Vincent ; Lobet, Yves ; Gern, Lise

In: International Journal of Medical Microbiology, 2003, vol. 293, p. 421-426

In Europe, Borrelia burgdorferi is transmitted by Ixodes ricinus to animals and human. When infected and uninfected ticks co-feed on a host, spirochetes are transmitted from ticks to animal and also to uninfected ticks. Here, we used uninfected ticks to co-feed with infected ticks on mice to evaluate this method to detect early infection in mice. A total of 128 mice were challenged...

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...

Université de Neuchâtel

Darkness induces mobility, and saturation deficit limits questing duration, in the tick Ixodes ricinus

Perret, Jean-Luc ; Guerin, Patrick M. ; Diehl, Peter A. ; Vlimant, Michèle ; Gern, Lise

In: Journal of experimental biology, 2003, vol. 206, p. 1809-1815

The behaviour of Ixodes ricinus nymphs was recorded in 10-day experiments using computer-assisted video-tracking, in the absence of any host stimuli. These ticks switch spontaneously from questing in a desiccating atmosphere to quiescence in a water-saturated atmosphere after dark. Quantification of both questing and quiescence duration demonstrates that questing duration is inversely...

See also: similar author names
1 Perret, Jacques
32 Perret, Jean-François
1 Perret, Julie