Laboratoire Population Environnement Développement, Université de Provence, Case 10, 13331, Cedex 3, Marseille, France.
Exp Appl Acarol. 2012 May;57(1):83-90. doi: 10.1007/s10493-012-9531-3. Epub 2012 Feb 19.
We investigated the Amblyomma fuscum load on a pullulating wild rodent population and the environmental and biological factors influencing the tick load on the hosts. One hundred and three individuals of Thrichomys laurentius were caught in an Atlantic forest fragment in northeastern Brazil, as part of a longitudinal survey on ticks infesting non-volant small mammals. Ticks (n = 342) were found on 45 individuals and the overall mean intensity of infestation was 7.6 ticks per infested rodent. Ticks were highly aggregated in the host population and the negative binomial distribution model provides a statistically satisfactory fit. The aggregated distribution was influenced by sex and age of the host. The microhabitat preference by T. laurentius probably increases contact opportunities between hosts and aggregated infesting stages of the ticks and represents important clues about the habitat suitability for A. fuscum.
我们调查了大量繁殖的野生啮齿动物种群中无花果树硬蜱的携带量，以及影响宿主蜱虫携带量的环境和生物学因素。在巴西东北部的一个大西洋森林片段中，我们捕获了 103 只劳氏鼩鼱，这是一项关于非飞行小型哺乳动物寄生蜱的纵向调查的一部分。在 45 只个体上发现了 342 只蜱虫，受感染啮齿动物的平均感染强度为 7.6 只蜱虫。蜱虫在宿主种群中高度聚集，负二项分布模型提供了统计学上令人满意的拟合。聚集分布受宿主的性别和年龄影响。劳氏鼩鼱的微生境偏好可能增加了宿主之间的接触机会和聚集的感染阶段的蜱虫，这代表了有关无花果树硬蜱栖息地适宜性的重要线索。
