[Ixodes ricinus, transmitted diseases and reservoirs].

摘要: The tick Ixodes ricinus has been recorded in most Italian regions especially thermo-mesophilous woods and shrubby habitats where the relative humidity allow to complete its 3 year developmental cycle, as predicted for European climatic ranges. This acts both vector reservoir a series of wildlife zoonotic pathogens, agents Lyme diseases, Tick borne encephalitis Human Granulocytic Ehrlichiosis, which are emerging Europe. To assess spatial distribution these pathogens infection risk humans animals within territory Province Trento, we carried out long term study using combination eco-epidemiological surveys mathematical modelling. An extensive collection with GIS based habitat suitability analysis allowed us identify areas occurs at various density. higher risk, estimated values R0 Borrelia burgdorferi s.l., TBE virus Anaplasma phagocytophila under different ecological conditions. We assessed prevalence species that play central role persistence infections, ie small mammals A. flavicollis C. glareolus. also considered double effect roe deer (Capreolus capreolus) act but is an incompetent host B. virus, thus reducing ticks last two pathogens. Infection was by PCR screening 1212 I. nymphs collected dragging six main during 2002. mean 1.32% s.l. 9.84% phagocytophila. previous 0.03%. rodents (with ELISA PCR) tissues blood samples from 367 rodent individuals trapped extensively 2002 6 areas. (N=238) found be infected all three investigated, ranging 3.3% 11.7% phagocytophila, 16.6% glareolus (N=108) showed 6.5% 12.7% while no were virus. screened 98 spleen PCR, resulting 19.8%. Using deterministic model explored condition diseases densities. resulted largely above 1 vast majority classified suitable occurrence Trentino, appeared more restricted