Guberti V, Bolognini M, Lanfranchi P, Battelli G
Istituto Nazionale Fauna Selvatica, Ozzano dell'Emilia, Bologna, Italy.
Parassitologia. 2004 Dec;46(4):425-7.
During the period 1987-1999, 119 wolf cadavers were examined and checked for the presence of Echinococcus granulosus. All the animals were retrieved along the whole Apennines range of distribution of the species in Italy and most of them were illegally killed. Eighteen wolves resulted positive (15%). The mean intensity was 697.5. The force of infection for prevalence was 8.2 year(-1). The prevalence of the parasite was significantly and positively influenced by the local prevalence of cystic echinococcosis (CE) in sheep. Mean intensity was significantly and positively influenced by both the age of the wolf and the prevalence of CE in sheep. A deterministic model was used in order to simulate a purely theoretical sylvatic cycle of the parasites having the wolf as the only definitive host with 15% of prevalence. The expected prevalence of CE in wild intermediate species ranges between 10% and 25%. This prevalence overlaps the one observed in sheep. Even if both the wolf and the wild ungulate populations are increasing, the wolf still acts as a part of the main dog-sheep cycle of the parasite.
在1987年至1999年期间，对119具狼的尸体进行了检查，以确定是否存在细粒棘球绦虫。所有这些狼均取自意大利该物种在亚平宁山脉的整个分布区域，其中大部分是被非法猎杀的。18只狼检测呈阳性（15%）。平均感染强度为697.5。患病率的感染力为8.2年（-1）。该寄生虫的患病率受到绵羊囊型包虫病（CE）当地患病率的显著正向影响。平均感染强度受到狼的年龄和绵羊中CE患病率的显著正向影响。为了模拟以狼作为唯一终末宿主、患病率为15%的寄生虫的纯理论自然循环，使用了一个确定性模型。野生中间宿主物种中CE的预期患病率在10%至25%之间。这一患病率与在绵羊中观察到的患病率重叠。即使狼和野生有蹄类动物的数量都在增加，狼仍然是该寄生虫主要的犬-羊循环的一部分。
