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[survey during 4 years of the infestation level of the tick ixodes ricinus (acari ixodidae) by borrelia burgdorferi, the agent of lyme borreliosis, in 2 forests in brittany].the authors followed, during 4 years consecutively, from 1987 to 1990, by immunofluorescence, the frequency of b. burgdorferi in an amount of 677 nymphs of i. ricinus tick, collected fasting by flagging in 2 forests in brittany (france). percentages obtained in each of these forests do not reveal significative differencies statistically and seem to show a relative stability, from one year to the following, during the considered period, of the infestation levels in ticks.19911807855
[risk of contamination by borrelia burgdorferi s. lato in a forest environment. survey during 13 months of abundance of the tick ixodes ricinus and its level of infestation by the lyme borreliosis agent in brittany].the authors, in a forest in brittany previously studied for several years, caught by flagging, each month from april 1992 to may 1993, nymphs of i. ricinus tick, and looked by indirect immunofluorescence, for b. burgdorferi infestation. an amount of 1,506 ticks was thus studied. infestation frequency was varying from 0 per cent in january and february to 14.4 per cent in august. standarding of tick collecting method allowed to establish, for each month, a tick, "availability" index, and, accordi ...19957787457
ecological factors influencing small mammal infection by anaplasma phagocytophilum and borrelia burgdorferi s.l. in agricultural and forest landscapes.small mammals are key components of numerous tick-borne disease systems, as hosts for immature ticks and pathogen reservoirs. to study the factors influencing tick-borne infection in small mammals, we trapped small mammals and collected questing ticks in spring and autumn in 2012 and 2013 at 24 sites in a 10x15 km rural landscapes (brittany, france). tissue samples were screened by real-time pcr for anaplasma phagocytophilum and borrelia burgdorferi sensu lato. of the two dominant small mammal s ...201728799685
first identification of rickettsia helvetica in questing ticks from a french northern brittany forest.tick-borne rickettsiae are considered to be emerging, but data about their presence in western europe are scarce. ixodes ricinus ticks, the most abundant and widespread tick species in western europe, were collected and tested for the presence of several tick-borne pathogens in western france, a region never previously explored in this context. there was a high tick abundance with a mean of 4 females, 4.5 males, and 23.3 nymphs collected per hour per collector. out of 622 tested ticks, specific ...201728248955
prevalence of tick-borne pathogens in adult dermacentor spp. ticks from nine collection sites in france.the importance of dermacentor spp. in the transmission of tick-borne pathogens is not well recognized in europe. to investigate the role of dermacentor spp. in the transmission of tick-borne pathogens, questing ticks were collected in 9 sites from southern to northwestern france (camargue delta to eastern brittany) where dermacentor spp. exist and tick-borne diseases had occurred previously. three tick species were collected during the spring and autumn of 2009. collected ticks (both males and f ...201323421886
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