Mannelli A, Kitron U, Jones C J, Slajchert T L
Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana-Champaign 61801.
J Med Entomol. 1993 Jan;30(1):87-93. doi: 10.1093/jmedent/30.1.87.
Infestation of the eastern chipmunk, Tamias striatus L., by immature Ixodes dammini Spielman, Clifford, Piesman and Corwin was studied in Castle Rock State Park in northwestern Illinois during June-October 1991. Mean larval density peaked in August, while nymphal density declined steadily through the study period. Prevalence of tick infestation was high throughout the trapping period. Tick distribution on chipmunks was aggregated in most of the sampling periods. Levels of I. dammini infestation recorded on chipmunks in this survey are higher than previous results recorded in the northeastern and midwestern United States. Chipmunks had significantly higher levels of nymphal I. dammini infestation than white-footed mice (Peromyscus leucopus Rafinesque). A major role of the eastern chipmunk as a host for immature I. dammini in upland forest habitat in northwestern Illinois can be established. In bottomland and ecotone habitats where chipmunks were scarce, P. leucopus contributed most to the feeding of larval ticks.
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，对东部花栗鼠（Tamias striatus L.）被未成熟的达氏硬蜱（Ixodes dammini Spielman、Clifford、Piesman和Corwin）寄生的情况进行了研究。幼虫平均密度在8月达到峰值，而若虫密度在整个研究期间稳步下降。在整个诱捕期间，蜱虫寄生的患病率都很高。在大多数采样期间，花栗鼠身上蜱虫的分布是聚集的。本次调查记录的花栗鼠身上达氏硬蜱的寄生水平高于美国东北部和中西部此前记录的结果。花栗鼠身上若虫阶段的达氏硬蜱寄生水平显著高于白足鼠（Peromyscus leucopus Rafinesque）。可以确定东部花栗鼠在伊利诺伊州西北部高地森林栖息地作为未成熟达氏硬蜱宿主的主要作用。在花栗鼠稀少的低地和生态交错带栖息地，白足鼠对幼虫蜱虫的取食贡献最大。
