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首页> 外文期刊>Journal of Medical Entomology >Infestation of Peromyscus leucopus and Tamias striatus by Ixodes scapularis (Acari: Ixodidae) in relation to the abundance of hosts and parasites
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Infestation of Peromyscus leucopus and Tamias striatus by Ixodes scapularis (Acari: Ixodidae) in relation to the abundance of hosts and parasites

机译：肩cap突触螨（Acari：Ixodidae）侵染白斑病菌和塔米亚纹癣菌与寄主和寄生虫的数量有关

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摘要

The risk of humans acquiring Borrelia burgdorferi infection is a function of the local density of nymphal and adult ticks that are infected with Lyme disease spirochaetes. This in turn, will be related to host-use patterns of ticks and to the densities of both juvenile ticks and their hosts. At a forested site in Dutchess County, New York, USA, host-use patterns of larval and nymphal I. scapularis infesting the 2 dominant vertebrate hosts, white-footed mice (P. leucopus) and eastern chipmunks (T. striatus), were quantified during 1995 and 1997-98. Larval tick burdens were 2-3 times higher on mice than they were on chipmunks, whereas nymphal tick burdens were >3 times higher on chipmunks than they were on mice. Multiple regression analysis was usedto examine juvenile tick and host densities as independent variables influencing tick burdens. The density of questing larval ticks was positively correlated with larval tick burdens on mice, whereas the density of questing nymphs was weakly related tonymphal burdens on either host. Effects of the densities of mice and chipmunks on tick burdens were strong in some years, but weak in others. Moreover, the sign of the regression coefficients changed from one year to the next. It is argued that these results are inconsistent with a passive encounter model of host selection, and it is suggested instead that either tick behaviour or host responses cause strong biases in the distribution of juvenile ticks on their hosts.
机译：人类感染伯氏疏螺旋体的风险是感染了莱姆病螺旋体的若虫和成年tick的局部密度的函数。反过来，这将与host的寄主使用模式有关，也与少年and及其寄主的密度有关。在美国纽约州荷兰郡的一片森林地带，感染了两个优势脊椎动物宿主的白鳍mice（P。leucopus）和东部花栗鼠（T. striatus）感染了幼虫和若虫肩II。在1995年和1997-98年间量化。小鼠的幼虫tick负担比花栗鼠高2-3倍，而花栗鼠的若虫tick负担比小鼠高三倍以上。多元回归分析被用来检查少年tick和寄主密度作为影响tick负担的自变量。觅食幼虫tick的密度与小鼠幼虫tick的负担呈正相关，而觅食若虫的密度与任一宿主上的若虫的负担均呈弱相关。老鼠和花栗鼠的密度对tick虫负担的影响在某些年中很强，但在另一些年中却很弱。此外，回归系数的符号从一年更改为下一年。有人认为，这些结果与寄主选择的被动model碰模型不一致，因此建议behavior行为或寄主反应在其幼年s的分布上引起强烈的偏见。

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