| prevalence of borrelia burgdorferi sensu lato infection in ixodes ricinus in sweden. | between 1988-1991, a total of 3,141 ixodes ricinus ticks, 2,740 adults and 401 nymphs, was collected from different localities in 23 of the 25 provinces of sweden. the ticks were identified, dissected and examined for the presence of borrelia spirochetes. indirect immunofluorescence was performed, using an antiserum obtained from rabbits, immunized with sonicated, whole borrelia burgdorferi spirochetes isolated from swedish ixodes ricinus ticks. borrelia-positive i. ricinus were found in all 23 ... | 1995 | 8685640 |