Blar i forfatter "Kristiansen, Bjørn Erik"
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Borrelia burgdorferi sensu lato-infected Ixodes ricinus collected from vegetation near the Arctic Circle
Hvidsten, Dag; Stordal, Frode; Lager, Malin; Rognerud, Bjørg; Kristiansen, Bjørn Erik; Matussek, Andreas; Gray, Jeremy; Stuen, Snorre (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-06)This is the first study to determine the density of questing Ixodes ricinus in northern Norway. It was performed at two sites in Brønnøy, which has been known for its tick permissive habitats for decades and is one of the northernmost habitats with an abundant I. ricinus population in the world. From April to November 2011, all stages of host-seeking I. ricinus were collected from the two sites. ... -
Detection of Anaplasma phagocytophilum in Ixodes ricinus ticks from Norway using a realtime PCR assay targeting the Anaplasma citrate synthase gene gltA
Henningsson, Anna J.; Hvidsten, Dag; Kristiansen, Bjørn Erik; Matussek, Andreas; Stuen, Snorre; Jenkins, Andrew (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-01)Background: A TaqMan real-time PCR assay targeting the Anaplasma citrate synthase gene, gltA, was developed and used for detection of Anaplasma phagocytophilum in 765 Ixodes ricinus ticks collected from dogs and cats in northern Norway (n = 669) and Telemark county in southern Norway (n = 96). Results: Among the ticks from northern Norway the prevalence of A. phagocytophilum was 3.0 %, while the ... -
The distribution limit of the common tick, Ixodes ricinus, and some associated pathogens in north-western Europe
Hvidsten, Dag; Frafjord, Karl; Gray, Jeremy S.; Henningsson, Anna Jonsson; Jenkins, Andrew; Kristiansen, Bjørn Erik; Lager, Malin; Rognerud, Bjørg; Slåtsve, Arne Martin; Stordal, Frode; Stuen, Snorre; Wilhelmsson, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-03)In north-western Europe, the common tick, <i>Ixodes ricinus</i>, is widely established, its distribution appears to be increasing and the spread of tick-borne diseases is of increasing concern. The project <i>‘Flått i Nord’</i> (Ticks in northern Norway) commenced in spring 2009 with the intention of studying the tick’s distribution and that of its pathogens in northern Norway. Several methods were ... -
The Telemark Meningococcal Project 1987-2007. Twenty years experience of preventing secondary cases of meningococcal disease by identification and erdication of the disease-causing strain of Neisseria meningitidis in close contacts of patients with primary meningococcal disease
Kristiansen, Bjørn Erik (Master thesis; Mastergradsoppgave, 2008-06-15)Once meningococcal disease occurs, the infection may spread leading to one or more secondary cases. The Telemark Meningococcal Project was initiated in 1987 to prevent secondary cases. By culture of throat samples from close contacts, meningococci were identified, and identity with the disease-causing strain from the patient was determined by DNA based typing techniques. Contacts carrying the ...