Duration of tick bites in a Lyme disease-endemic area
Duration of tick bites in a Lyme disease-endemic area
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DOI：
10.1093/oxfordjournals.aje.a008728
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发表时间：
1996-01-15
影响因子：
5
通讯作者：
Piesman, J
中科院分区：
文献类型：
--
作者：
Falco, RC;Fish, D;Piesman, J
建立了基于盾片指数（体长/盾片宽度）的回归方程，以确定若虫和成年雌性肩胛硬蜱的附着持续时间，计算了 1985 年至 1989 年间纽约州韦斯特切斯特县（莱姆病高度流行的地区）咬伤受害者提交的 444 只若虫和 300 只雌性蜱的进食时间，若虫附着的平均时间为34.7小时，48小时后去除26.8%，这是伯氏疏螺旋体传播的关键时间。依恋时间随着受害者年龄等级的增加而增加（Kruskal-Wallis 检验，p < 0.05），雌性蜱的平均依恋持续时间（28.7 小时）明显少于若虫（Kruskal-Wallis 检验，p < 0.05），其中 23.3% 的依恋时间超过 48 小时，0 至 9 岁年龄段的雌性蜱的依恋时间超过 48 小时的比例最高（37.1%）。超过 48 小时，若虫附着在成年蜱虫叮咬受害者身上的时间比附着在儿童身上的时间长。然而，儿童感染莱姆病的风险很高，因为他们受到更多的若虫叮咬，也因为他们不太可能及时清除雌性蜱虫以防止传播。
Regression equations, based on scutal index (body length/scutal width), were developed to determine the duration of attachment for nymphal and adult female Ixodes scapularis ticks, Feeding times were calculated for 444 nymphal and 300 female ticks submitted by bite victims between 1985 and 1989 in Westchester County, New York, an area where Lyme disease is highly endemic, Nymphs were attached for a mean of 34.7 hours, with 26.8% removed after 48 hours, the critical time for transmission of Borrelia burgdorferi. Attachment times increased with victim age class (Kruskal-Wallis test, p < 0.05), Mean duration of attachment for female ticks (28.7 hours) was significantly less (Kruskal-Wallis test, p < 0.05) than that for nymphs, with 23.3% attached for more than 48 hours, The 0- to 9-year age class had the highest proportion (37.1%) of females attached for more than 48 hours, Nymphs remain attached to adult tick-bite Victims longer than they remain attached to children, However, children have a high risk of acquiring Lyme disease because they receive more nymphal bites and also because they are less likely to have female ticks removed in time to prevent transmission.