کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5807159 | 1113109 | 2014 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ixodes ricinus and Borrelia prevalence at the Arctic Circle in Norway Ixodes ricinus and Borrelia prevalence at the Arctic Circle in Norway](/preview/png/5807159.png)
The distribution limit of Ixodes ricinus ticks in northwestern Europe (Brønnøy, Norway, 1° south of the Arctic Circle), has been known since the 1930s. To reconfirm this finding and extend studies in the areas adjacent to the Arctic Circle (66°33ⲠN), ticks were collected from dogs and cats in 8 districts in northern Norway from 64°56ⲠN to 68°48ⲠN. We detected 549 I. ricinus, 244 (44%) of them in Brønnøy district, and 305 (range 6-87 ticks) in 7 districts in the northern part of the study area. The prevalence of Borrelia in these ticks was determined by real-time PCR. In the Brønnøy district (65°28ⲠN, 12°12ⲠE), 29% of the I. ricinus were Borrelia spp.-positive, and the species B. afzelii was nearly twice as prevalent as B. garinii and/or B. valaisiana. In the study area north of Brønnøy district, only 12 (4%) of the collected ticks contained Borrelia spp. In conclusion, tick occurrence and Borrelia prevalence are high in the Brønnøy district. In contrast, I. ricinus occurrence and Borrelia prevalence are low further north across the Arctic Circle in Norway.
Journal: Ticks and Tick-borne Diseases - Volume 5, Issue 2, March 2014, Pages 107-112