[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. | 1991 | 1807855 |
[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 ... | 1995 | 7787457 |