| genetic diversity of borrelia burgdorferi sensu lato in ticks from mainland portugal. | to date borrelia lusitaniae is the only genospecies of borrelia burgdorferi sensu lato isolated from ixodes ricinus ticks collected in portugal and tunisia. this suggests that the genospecies diversity of b. burgdorferi sensu lato decreases toward the southwestern margin of its old world subtropical range. in order to further explore the genetic diversity of b. burgdorferi sensu lato from this region, 55 i. ricinus and 27 hyalomma marginatum questing adults, collected during the spring of 1998 f ... | 2000 | 10834965 |