Morozov I M, Alekseev A N, Dubinina E V, Nikitin A Ya, Melnikova O V, Andaev E I
Med Parazitol (Mosk). 2015 Jul-Sep(3):42-5.
The paper presents the results of 10-year (2005-2014) observations of an Ixodespersulcatus Schulze population. The purpose of this investigation was to trace long-term changes in the structure of the taiga tick population from the proportion of specimens with external skeletal anomalies and to assess a relationship between the pattern of imago phenotypic variation and the virus percentage of a carrier. There were a total of reports of the external skeletal structure of 1123 females gathered from plants to a flag in an area at 43 km from the Baikal Road connecting Irkutsk and the settlement of Listvyanka (Irkutsk Region). The proportion of specimens with anomalies averaged 37.8 +/- 1.88%. Four-to-seven varying anomalies were annually recorded. There was a preponderance of scutum impairment (an average of 17.0 +/- 3.08% of all females) that was a conglomerate of prominences and indentations along the entire clypeus surface and that was denoted P9. The nature of a change in the proportion of ticks with two anomalies (average monthly registration rate, 2.5 +/- 0.66%) is exhibited by three-year high-frequency oscillations whereas the specimens with P9 anomalies fail to show so clear cycling. The percentage of virus-containing taiga ticks was individually determined estimating the level of tick-borne encephalitis virus antigen by an enzyme immunoassay. A total of 4022 ticks were examined. The male and female data were pooled. There was a positive correlation between the change in the proportion of females with P9 anomaly and the infection of ticks in the examined population (Spearman's correlation coefficient, 0.88; P < 0.01). This supports the earlier observation of the greater epidemiological significance of the imago of a taiga tick with external skeletal anomalies particularly with considerably marked ones.
本文呈现了对全沟硬蜱种群进行10年（2005 - 2014年）观察的结果。本研究的目的是通过具有外部骨骼异常的标本比例来追踪针叶林蜱种群结构的长期变化，并评估成虫表型变异模式与载体病毒携带率之间的关系。在距离连接伊尔库茨克和利斯特维扬卡定居点（伊尔库茨克地区）的贝加尔公路43公里处的一个区域，从植物到旗帜上总共收集了1123只雌性蜱的外部骨骼结构报告。有异常的标本比例平均为37.8±1.88%。每年记录到4至7种不同的异常情况。盾板损伤占优势（平均占所有雌性的17.0±3.08%），盾板损伤是沿着整个额面表面的凸起和凹陷的集合，标记为P9。具有两种异常的蜱比例变化的性质（平均每月记录率为2.5±0.66%）呈现出三年高频振荡，而具有P9异常的标本则没有如此明显的周期性。通过酶免疫测定法估计蜱传脑炎病毒抗原水平，单独确定含病毒的针叶林蜱的比例。总共检查了4022只蜱。将雄性和雌性数据合并。具有P9异常的雌性比例变化与所检查种群中蜱的感染之间存在正相关（斯皮尔曼相关系数为0.88；P < 0.01）。这支持了早期的观察结果，即具有外部骨骼异常尤其是明显异常的针叶林蜱成虫具有更大的流行病学意义。
