Options
Herrmann, Coralie
Résultat de la recherche
Species co-occurrence patterns among Lyme borreliosis pathogens in the tick vector Ixodes ricinus
2013-1-1, Herrmann, Coralie, Gern, Lise, Voordouw, Maarten
Do the levels of energy reserves, hydration status and Borrelia infection influence walking by Ixodes ricinus (Acari : Ixodidae) ticks?
2012-1-1, Herrmann, Coralie, Gern, Lise
Do the level of energy reserves, hydration status and Borrelia infection influence walking by Ixodes ricinus (Acari: Ixodidae) ticks?
, Herrmann, Coralie, Gern, Lise
Ixodes ricinus horizontal movement within a humidity gradient and the influence of infection by Borrelia burgdorferi sensu lato (s.l.) on tick walking were investigated. Nymphs were placed within an arena containing a humidity gradient ranging from 45 to 95% relative humidity (RH). After 1 h of acclimation at 70% RHticks were released so that they could either stay, or walk towards either the wet or the dry end. Their position was recorded 2 h post-release. Fat content was quantified and Borrelia infection was detected using real-time PCR and PCR followed by Reverse Line Blotting. Among the 1500 ticks tested, 29·85% were infected. More low- fat nymphs walked inside the arena than high-fat individuals. When nymphs walked, more low-fat ticks walked towards wetter than drier air, whereas more high-fat individuals walked towards drier than wetter air. Among high-fat nymphs, a lower proportion of Borrelia-infected ticks walked inside the arena compared to uninfected individuals, as though spirochetes manipulated their arthropod vector to stay. However, Borrelia infection had no effect on walking direction towards the dry or the wet end. Hence, it appears that I. ricinus nymphs walk horizontally over short distances within a humidity gradient depending on both energy resources and Borrelia infection.
Survival of Ixodes ricinus (Acari: Ixodidae) nymphs under cold conditions is negatively influenced by frequent temperature variations
2013-1-1, Herrmann, Coralie, Gern, Lise
Réchauffement climatique : Piqûres de tique plus dangereuses ?
2012-1-1, Gern, Lise, Herrmann, Coralie
Ixodes ricinus ticks infected with the causative agent of Lyme disease, Borrelia burgdorferi sensu lato, have higher energy reserves
2013-1-1, Herrmann, Coralie, Voordouw, Maarten, Gern, Lise
Survival of Ixodes ricinus (Acari: Ixodidae) under challenging conditions of temperature and humidity is influenced by Borrelia burgdorferi sensu lato infection
2010-1-1, Herrmann, Coralie, Gern, Lise