Mannelli A, Kitron U, Jones C J, Slajchert T L
Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Illinois at Urbana-Champaign 61801.
J Parasitol. 1994 Dec;80(6):1038-42.
The effects of season and habitat on the infestation of the white-footed mouse (Peromyscus leucopus) by immature Ixodes scapularis were studied at Castle Rock State Park, northwestern Illinois, during June-October 1991. Relative density of larvae on mice was higher in mid-late summer (13.7 ticks per mouse) than during the rest of the study period, whereas prevalence of nymphal infestation was highest in early summer (33.3%). Relative density of I. scapularis larvae and prevalence of nymphs on mice did not differ significantly among bottomland forest, field-forest ecotone, and upland forest habitats. In bottomland forest, total number of ticks collected from mice (472 larvae and 13 nymphs) and P. leucopus population density (6.6 mice per 0.36 ha) were higher than in the other habitats. Temporal patterns of numbers of larvae collected from mice and through dragging in bottomland forest were significantly correlated.
1991年6月至10月期间，在伊利诺伊州西北部的卡斯尔岩州立公园，研究了季节和栖息地对未成熟肩突硬蜱侵染白足鼠（白足鼠）的影响。夏末秋初时，小鼠身上幼虫的相对密度（每只小鼠13.7只蜱）高于研究期间的其他时段，而若虫侵染率在初夏时最高（33.3%）。在低地森林、农田-森林交错带和山地森林栖息地中，小鼠身上肩突硬蜱幼虫的相对密度和若虫侵染率没有显著差异。在低地森林中，从小鼠身上采集到的蜱的总数（472只幼虫和13只若虫）以及白足鼠的种群密度（每0.36公顷6.6只小鼠）高于其他栖息地。在低地森林中，从小鼠身上采集到的幼虫数量以及通过拖网采集到的幼虫数量的时间模式显著相关。
