An Acarologic Survey and Amblyomma americanum Distribution Map with Implications for Tularemia Risk in Missouri
An Acarologic Survey and Amblyomma americanum Distribution Map with Implications for Tularemia Risk in Missouri
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DOI：
10.4269/ajtmh.2011.10-0593
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发表时间：
2011-03-01
影响因子：
3.3
通讯作者：
Eisen, Rebecca J.
中科院分区：
文献类型：
--
作者：
Brown, Heidi E.;Yates, Karen F.;Eisen, Rebecca J.
在美国，蜱传疾病发生灶性。密苏里州是几种蜱传疾病的主要集中地，包括斑点热立克次体病、兔热病和埃立克体病。我们的研究旨在确定人类暴露于该地区人类叮咬媒介蜱的潜在风险。2009年6月7日至10日，我们在密苏里州南部的79个地点收集了蜱，其中产生了1，047只成虫和3，585只若虫美洲钝眼蜱，5只成虫斑点钝眼蜱，19只成虫变异革蜱和5只若虫褐色硬蜱。Logistic回归分析显示，A. americanum nerve或成年人更有可能被归类为森林比草地，被归类为高风险的概率增加，在6月（30年平均）的相对湿度。这两个模型的总体准确度都大于70%，并显示20%和30%的州分别被归类为人类暴露于汞和成人的风险升高。我们还发现，蜱螨学风险升高与报告兔热病病例的县之间存在显著正相关。我们的研究提供了一个更新的分布图A。americanum在密苏里州，并提出了一个广泛的风险，人类接触A。美国及其相关病原体在该地区。
In the United States, tickborne diseases occur focally. Missouri represents a major focus of several tickborne diseases that includes spotted fever rickettsiosis, tularemia, and ehrlichiosis. Our study sought to determine the potential risk of human exposure to human-biting vector ticks in this area. We collected ticks in 79 sites in southern Missouri during June 7-10, 2009, which yielded 1,047 adult and 3,585 nymphal Amblyomma americanum,5 adult Amblyomma maculatum, 19 adult Dermacentor variabilis, and 5 nymphal lxodes brunneus. Logistic regression analysis showed that areas posing an elevated risk of exposure to A. americanum nymphs or adults were more likely to be classified as forested than grassland, and the probability of being classified as elevated risk increased with increasing relative humidity during the month of June (30-year average). Overall accuracy of each of the two models was greater than 70% and showed that 20% and 30% of the state were classified as elevated risk for human exposure to nymphs and adults, respectively. We also found a significant positive association between heightened acarologic risk and counties reporting tularemia cases. Our study provides an updated distribution map for A. americanum in Missouri and suggests a wide-spread risk of human exposure to A. americanum and their associated pathogens in this region.