Tomsk State University, Tomsk, Russia.
State Research Centre of Virology and Biotechnology 'Vector', World-Class Genomic Research Center for Biological Safety and Technological Independence, Koltsovo, Novosibirsk Region, Russia.
Folia Parasitol (Praha). 2021 Nov 16;68:2021.024. doi: 10.14411/fp.2021.024.
The Tomsk region located in the south of Western Siberia is one of the most high-risk areas for tick-borne diseases due to elevated incidence of tick-borne encephalitis and Lyme disease in humans. Wild birds may be considered as one of the reservoirs for tick-borne pathogens and hosts for infected ticks. A high mobility of wild birds leads to unpredictable possibilities for the dissemination of tick-borne pathogens into new geographical regions. The primary goal of this study was to evaluate the prevalence of tick-borne pathogens in wild birds and ticks that feed on them as well as to determine the role of different species of birds in maintaining the tick-borne infectious foci. We analysed the samples of 443 wild birds (60 species) and 378 ticks belonging to the genus Ixodes Latraille, 1795 collected from the wild birds, for detecting occurrence of eight tick-borne pathogens, the namely tick-borne encephalitis virus (TBEV), West Nile virus (WNV), and species of Borrelia, Rickettsia, Ehrlichia, Anaplasma, Bartonella and Babesia Starcovici, 1893, using RT-PCR/or PCR and enzyme immunoassay. One or more tick-borne infection markers were detected in 43 species of birds. All markers were detected in samples collected from fieldfare Turdus pilaris Linnaeus, Blyth's reed warbler Acrocephalus dumetorum Blyth, common redstart Phoenicurus phoenicurus (Linnaeus), and common chaffinch Fringilla coelebs Linnaeus. Although all pathogens have been identified in birds and ticks, we found that in the majority of cases (75.5 %), there were mismatches of pathogens in birds and ticks collected from them. Wild birds and their ticks may play an extremely important role in the dissemination of tick-borne pathogens into different geographical regions.
西伯利亚西南部的托木斯克地区是蜱传疾病的高风险地区之一，因为该地区人类感染蜱传脑炎和莱姆病的发病率很高。野生鸟类可能被视为蜱传病原体的储存库之一，也是受感染蜱的宿主。野生鸟类的高度流动性导致蜱传病原体向新地理区域传播的可能性不可预测。本研究的主要目标是评估野生鸟类和以其为食的蜱中蜱传病原体的流行情况，并确定不同鸟类物种在维持蜱传传染病焦点中的作用。我们分析了从野生鸟类中采集的 443 只野生鸟类（60 种）和 378 只属于Ixodes Latraille, 1795 属的蜱的样本，以检测 8 种蜱传病原体的发生情况，即蜱传脑炎病毒（TBEV）、西尼罗河病毒（WNV）以及伯氏疏螺旋体、立克次体、埃立克体、无形体、巴尔通体和巴贝虫 Starcovici, 1893 ，使用 RT-PCR/或 PCR 和酶免疫测定法。在 43 种鸟类中检测到一种或多种蜱传感染标志物。从野外采集的普通八哥 Turdus pilaris Linnaeus、白眉苇莺 Acrocephalus dumetorum Blyth、红尾鸲 Phoenicurus phoenicurus (Linnaeus) 和普通朱雀 Fringilla coelebs Linnaeus 样本中检测到所有标志物。尽管在鸟类和蜱中都发现了所有病原体，但我们发现，在大多数情况下（75.5%），从鸟类和蜱中采集的病原体不匹配。野生鸟类及其蜱可能在将蜱传病原体传播到不同地理区域方面发挥着极其重要的作用。
