Neoehrlichia mikurensis is a tick-borne pathogen widespread among ticks and rodents in Europe and Asia. A previous study on Ixodes ricinus ticks in Norway suggested that N. mikurensis was scarce or absent on the south-west coast of Norway, but abundant elsewhere. The aim of this study was to further investigate the prevalence and distribution of N. mikurensis along the western seaboard of Norway in comparison with more eastern and northern areas. The second aim of the study was to examine seasonal variation of the bacterium in one specific location in the south-eastern part of Norway. Questing I. ricinus were collected from 13 locations along the coast of Norway, from Brønnøysund in Nordland County to Spjaerøy in Østfold County. In total, 11,113 nymphs in 1,113 pools and 718 individual adult ticks were analysed for N. mikurensis by real-time PCR. The mean prevalence of N. mikurensis in adult ticks was 7.9% while the estimated pooled prevalence in nymphs was 3.5%. The prevalence ranged from 0% to 25.5%, with the highest prevalence in the southernmost and the northernmost locations. The pathogen was absent, or present only at low prevalence (<5%), at eight locations, all located in the west, from 58.9°N to 64.9°N. The prevalence of N. mikurensis was significantly different between counties (p < .0001). No significant seasonal variation of N. mikurensis prevalence was observed in the period May to October 2015. Our results confirm earlier findings of a low prevalence of N. mikurensis in the western seaboard of Norway.

中文翻译：

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挪威沿海沿岸I（Ixodes ricinus）壁虱中的新翅藻（Neoehrlichia mikurensis）分布：西部沿海地区是一个低流行区域。

miehurensis mikurensis是由tick传播的病原体，广泛分布于欧洲和亚洲的s和啮齿动物中。先前对挪威蓖麻I的研究表明，挪威西南海岸的米克猪笼草稀少或缺乏，但在其他地方却很丰富。这项研究的目的是与其他东部和北部地区相比，进一步调查挪威西部沿海地区的mikurensis流行情况和分布。这项研究的第二个目的是在挪威东南部的一个特定位置检查细菌的季节性变化。从挪威北部的Brønnøysund到Østfold县的Spjaerøy，从挪威沿海的13个地点收集了蓖麻。通过实时PCR，总共对1113个池中的11113个若虫和718个成年s进行了分析。成年s中米克猪笼草的平均患病率为7.9％，若虫若虫的综合患病率估计为3.5％。患病率在0％至25.5％之间，在最南端和最北端的位置患病率最高。从西部的58.9°N到64.9°N的八个位置都没有病原体，或者仅以低流行率（<5％）出现。县间米克猪笼草的患病率显着不同（p <.0001）。在2015年5月至2015年10月期间，未观察到mikurensis患病率的明显季节性变化。我们的结果证实了挪威西部沿海地区mikurensis患病率较低的早期发现。在最南端和最北端的位置患病率最高。从西部的58.9°N到64.9°N的八个位置都没有病原体，或者仅以低流行率（<5％）出现。县间米克猪笼草的患病率显着不同（p <.0001）。在2015年5月至2015年10月期间，未观察到mikurensis患病率的明显季节性变化。我们的结果证实了挪威西部沿海地区mikurensis患病率较低的早期发现。在最南端和最北端的位置患病率最高。从西部的58.9°N到64.9°N的八个位置都没有病原体，或仅以低患病率（<5％）出现。县间米克猪笼草的患病率显着不同（p <.0001）。在2015年5月至2015年10月期间，未观察到mikurensis患病率的明显季节性变化。我们的结果证实了挪威西部沿海地区mikurensis患病率较低的早期发现。