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Type of publication: conference paper
Type of publication (PDB): Konferencijų tezės nerecenzuojamuose leidiniuose / Conference theses in non-peer-reviewed publications (T2)
Field of Science: Biologija / Biology (N010)
Author(s): Rosef, Olav;Paulauskas, Algimantas;Radzijevskaja, Jana;Sageie, Jostein;Haslekås, Cammilla;Kløcker, Lars
Title: The role of big game in the epidemiology of "Borrelia burgdorferi" s.l. and "Anaplasma phagocytophilum"
Is part of: IJSTD X : X International Jena Symposium on Tick-borne Diseases (formerly IPS) 2009 : prevention, 19-21 March, 2009, Weimar (Germany) : programme and abstracts. [Jena]
Extent: p. 120-120
Date: 2009
Keywords: Big game;Borrelia;Anaplasma
Abstract: Ixodes ticks are known to parasitize deer species, but the role of cervids in the epidemiology of Lyme disease spirochetes is not completely understood. Roe deer and red deer are incompetent reservoirs for Borrelia burgdorferi s.l. It has been suggested that adaptive immune responses may be involved in their regulation of the spirochete transmission. Tick-borne fever caused by Anaplasma phagocytophilum has been considered a common disease in domestic ruminants along the coast of southern Norway. Also wild cervids have been found infected with A. phagocytophilum. We compared the prevalence of B. burgdorferi s.l. and A. phagocytophilum in I. ricinus ticks in sites with high abundance of roe deer, red deer, and moose, compared to low abundant sites, to evaluate the infection routes and epidemiology. The highest prevalence of A. phagocytophilum in ticks was found on the sites Fjelløyvær and Strøm (with 15.6% and 19.4% in 2007, respectively) both with high abundance of roe deer and red deer compared to sites Tjore and Hinnebu with low abundance (0%). The opposite situation was found for B. burgdorferi s.l. with infection rates of 16.5% in Hinnebu and 7.5% in Tjore, but no infected ticks were detected in Fjelløyvær and Strøm. The hunting statistics for big game at Fjelløyvær was 8.67 killed individuals per km2, 3.12 at Strøm, 0.75 at Tjore, and 0.69 at Hinnebu. High levels of cervids raise the abundance of ticks and the prevalence of A. phagocytophilum, and may also raise the risk of infection in humans. However, high levels of cervids may also reduce levels of B. burgdorferi s.l. in ticks and therefore the risk of human infection by tick bites
Affiliation(s): Biologijos katedra
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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