prevalence of anaplasma phagocytophilum infection and effect on lamb growth.abstract: background: a major challenge in sheep farming during the grazing season along the coast of south-western norway is tick-borne fever (tbf) caused by the bacteria anaplasma phagocytophilum that is transmitted by the tick ixodes ricinus. methods: a study was carried out in 2007 and 2008 to examine the prevalence of a. phagocytophilum infection and effect on weaning weight in lambs. the study included 1208 lambs from farms in sunndal ram circle in more and romsdal county in mid-norway, wh ...201121569524
borrelia burgdorferi sensu lato and anaplasma phagocytophilum in ixodes ricinus ticks in brønnøysund in northern norway.ticks are important vectors of disease for both humans and animals. in europe, lyme borreliosis is the most abundant tick-borne human disease, whereas anaplasmosis, or tick-borne fever, is the most widespread tick-borne infection in domestic animals. however, knowledge about the prevalence of the causative disease agents in questing ticks in the northern range of their distribution in norway is missing. ixodes ricinus ticks were therefore collected by flagging vegetation in brønnøysund, an area ...201223333106
borrelia burgdorferi sensu lato and ehrlichia spp. in ixodes ticks from southern norway.we report the results of a study of the prevalence of ehrlichia and borrelia species in 341 questing ixodes ricinus ticks from two locations in southern norway. the prevalences of borrelia burgdorferi sensu lato and ehrlichia spp. were, respectively, 16 and 11.5% at site 1 and 17 and 6% at site 2. prevalence and species composition of borrelia and ehrlichia varied with location and date of collection. the dominant borrelia species at both sites was borrelia afzelii, followed by borrelia burgdorf ...200111574588
experimental infection in lambs with a red deer (cervus elaphus) isolate of anaplasma phagocytophilum.anaplasma phagocytophilum transmitted by ixodes spp. ticks is the causative agent of tick-borne fever (tbf) in domestic ruminants. tbf is widespread along the coast of southern norway and may cause a severe problem for the sheep industry. red deer (cervus elaphus) are important hosts for ticks and have been found to be infected naturally with a. phagocytophilum. however, it is unclear whether red deer could serve as reservoir hosts for a. phagocytophilum infections in sheep. we infected lambs ex ...201020688686
serological investigation of granulocytic ehrlichia infection in sheep in norway.serum samples of 749 sheep from 75 sheep flocks in norway, i.e. 361 lambs (6 to 7 months old) and 388 adults (> 1.5 year), were analysed for antibodies to ehrlichia equi. ten animals from each flock were examined. seropositive animals were found along the coast of southern norway from vestfold to sør-trøndelag (as far north as 63 degrees 38'n). seropositive sheep were not found in southeast, east or northern norway. thirty-two flocks were seropositive, although tick-borne fever had only been dia ...200111887393
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