| [the transmission of tick-borne encephalitis in switzerland. an attempt at establishing a register of natural reservoirs for a seroepidemiologic examination of forest personnel in the middle of the country]. | the aim of this investigation was to localize natural foci of tickborne encephalitis (tbe) in switzerland by means of two approaches. (1) sera of foresters, who are particularly exposed to tbe, were examined, restricting serum collection to the plateau between the lake of constance and the lake of geneva. (2) virus isolations were performed on 8600 ticks (ixodes ricinus) collected all over the country. in four regions natural foci of varying size were detected: (1) in the northern parts of the c ... | 1981 | 7280635 |
| influence of saturation deficit and temperature on ixodes ricinus tick questing activity in a lyme borreliosis-endemic area (switzerland). | questing ixodes ricinus ticks were sampled monthly in a periurban mixed forest at neuchâtel, switzerland, in 1996, 1997, and 1998. a total of 5,530 i. ricinus nymphs and 1,385 adults were collected. the emergence of questing tick populations in spring varied among years in relation to the air temperature. the monthly variation in questing nymph density was negatively correlated with the saturation deficit; there was a strong decrease in tick numbers in late spring and summer as soon as the satur ... | 2000 | 10935905 |
| ixodes ricinus density, and distribution and prevalence of borrelia burgdorferi sensu lato infection along an altitudinal gradient. | 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 at three different altitudes (620, 740, and 900 m above sea level) on the slope of a mountain in chaumont (neuchâtel, switzerland ... | 2004 | 15061274 |
| phenology of ixodes ricinus and infection with borrelia burgdorferi sensu lato along a north- and south-facing altitudinal gradient on chaumont mountain, switzerland. | questing ixodes ricinus l. ticks were collected monthly from 2003 to 2005 on the north- and south-facing slopes of chaumont mountain in neuchâtel, switzerland, at altitudes varying from 620 to 1,070 m. on the south-facing slope, questing tick density was higher than on the north-facing slope, and it decreased with altitude. density tended to increase with altitude on the north-facing slope. saturation deficit values higher than 10 mmhg and lasting for >2 mo were often recorded on the south-facin ... | 2007 | 17695026 |
| tick bites in a lyme borreliosis highly endemic area in switzerland. | 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 female ticks were detached at predetermined intervals (24, 48, 72, and 96h) from laboratory mice and rabbits and thei ... | 2009 | 18722157 |
| Prospective study on the incidence of infection by Borrelia burgdorferi sensu lato after a tick bite in a highly endemic area of Switzerland. | The periurban forest of Neuchâtel (Switzerland) is a high-risk area for Lyme Borreliosis, due to a high density of infected Ixodes ricinus ticks. In this study, we evaluated the risk of subclinical (seroconversion) and clinical infection after a tick bite in Neuchâtel inhabitants from 2003 to 2005. Inhabitants have been invited, through media, to visit a physician after a tick bite. A questionnaire was filled out and two blood samples were taken at 8-week interval. EIA screening tests for IgM an ... | 2011 | 21890065 |