Cases of tick-borne diseases (TBE and Lyme borreliosis) were recently recorded from the province of Trento, Italian Alps. Roe deer (Capreolus capreolus) is thought to be the main host for I. ricinus in the Alps. The pattern of infestation of ticks on 484 male roe deer harvested in September 1994 in 56 game districts was assessed by questionaries filled in by the hunters. Presence and abundance of I. ricinus were analysed by a model based on CART (Classification and Regression Trees), using both discrete and continuous variables concerning environmental parameters and host density. The CART model discriminated two variables which appear to have the greatest effect on the occurrence of ticks on roe deer. Altitude and host density, with decrease of tick abundance above 1000 m a.s.l. or with roe deer density below 10 head/100 ha
Analysis of the Distribution and Abundance of Ixodes ricinus (Acari: Ixodidae) on Roe Deer (Capreolus capreolus) in the Italian Alps
Rizzoli, Annamaria;Merler, Stefano;Furlanello, Cesare
1996-01-01
Abstract
Cases of tick-borne diseases (TBE and Lyme borreliosis) were recently recorded from the province of Trento, Italian Alps. Roe deer (Capreolus capreolus) is thought to be the main host for I. ricinus in the Alps. The pattern of infestation of ticks on 484 male roe deer harvested in September 1994 in 56 game districts was assessed by questionaries filled in by the hunters. Presence and abundance of I. ricinus were analysed by a model based on CART (Classification and Regression Trees), using both discrete and continuous variables concerning environmental parameters and host density. The CART model discriminated two variables which appear to have the greatest effect on the occurrence of ticks on roe deer. Altitude and host density, with decrease of tick abundance above 1000 m a.s.l. or with roe deer density below 10 head/100 haI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
