Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Borrelia burgdorferi sensu lato in ticks (Acari: Ixodidae) from two different foci in Spain.

Abstract

The prevalence of B. burgdorferi s.l. in several tick species was studied over a 2-year period in 2 ecologically different areas in Spain. One area (Rioja and Soria provinces) was an endemic area for Lyme disease, with a number of autochthonous human cases and supported large populations of Ixodes ricinus on cattle and birds; the second area (Zaragoza, Huesca and Teruel provinces) was characterized by the absence of I. ricinus together with the presence of foxes [Vulpes vulpes] and their associated tick species. While I. ricinus was the main vector of B. burgdorferi in the endemic area (with a mean prevalence of 14% in adults and 51% in nymphs), adults of both I. canisuga and I. hexagonus had high rates of B. burgdorferi prevalence (30 and 28%, respectively) in the zone where I. ricinus was absent. Immatures of I. frontalis were found to be carriers of the spirochaete only in those zones where I. ricinus is present, suggesting evidence for reservoir competence in a tick-bird cycle.