会议专题

Endosymbionts in Ticks of Norway-A Possible Target of Biological Manipulation and Disease Control?

  Ticks have an almost global distribution and tick-borne diseases are of growing concern with regards to both animal and human health.Examples of pathogenic bacteria transmitted by ticks are: Borrelia burgdorferi,Anaplasma phagocytophilum,Francisella tularensis,Rickettsia helvetica,Bartonella spp.,Babesia spp.and tick-borne encephalitis (TBE)virus.Changes in climatic conditions have been suggested to affect the spatial distrihution of ticks.but other factors such as growing wild game populations,migratory birds and grazing conditions also play an important role.About 80% of the world cattle population is exposed to ticks.which leaves ticks to be the ecto-parasite of greatest economic impact on livestock productions worldwide.Ahout 300,000 lambs are infected annually by the tick-bacterium A.phagocytophilum (tick-borne fever)in Norway.The disease results in great economic losses to the farming communities and large animal welfare challenges.Recently,there has heen an increasing focus on biological methods for the control of tick populations and diseases as a result of increasing antimicrobial resistance attained by parasites and microhes.Tick pathogens have received much attention,but ticks do also carry non-pathogenic organisms that are endosymbionts.One theory is that endosymbionts previously were disease-causing micro-organisms in animals that,in the course of evolution,were acquired hy ticks when taking blood meals.These endosymbionts may become important in the biological control of ticks and their diseases in the future.A pilot project was initiated in 2010.The aim was to investigate whether the newly discovered symbiont Midichloria mitochondrii occurs in ticks (Ixodes ricinus)in Norway.Three areas in Rogaland and Hordaland counties were selected as sampling sites as these are regions where ticks and tick-related disease are highly prevalent.

Granquist,EG Lindgren,PE Matussek,A Kristiansson,M Okstad,W Stuen,S

Department of Production Animal Clinical Sciences,Norwegian School of Veterinary Science,Oslo/* Sand Division of Medical Microbiology,Department of Clinical and Experimental Medicine,Linkoping Universi Department of Clinical Microbiology,County Hospital Ryhov,Jonkoping,Sweden

国际会议

XVIth International Congress on Animal Hygiene(第十六届动物卫生国际会议(ISAH 2013))

南京

英文

239-241

2013-05-05(万方平台首次上网日期,不代表论文的发表时间)