Snorre Stuen

Summary

Affiliation: Norwegian School of Veterinary Science
Country: Norway

Publications

  1. pmc Occurrence of haemolytic Mannheimia spp. in apparently healthy sheep in Norway
    Louise L Poulsen
    Department of Veterinary Pathobiology, The Royal Veterinary and Agricultural University, 4 Stigbøljen, DK 1870 Frederiksberg C, Copenhagen, Denmark
    Acta Vet Scand 47:70. 2006
  2. ncbi request reprint Experimental infection in lambs with a red deer (Cervus elaphus) isolate of Anaplasma phagocytophilum
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Kyrkjeveien 332 334, N 4325 Sandnes, Norway
    J Wildl Dis 46:803-9. 2010
  3. pmc Superinfection occurs in Anaplasma phagocytophilum infected sheep irrespective of infection phase and protection status
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Sandnes, Norway
    Acta Vet Scand 51:41. 2009
  4. ncbi request reprint Anaplasma phagocytophilum - the most widespread tick-borne infection in animals in Europe
    S Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Sandnes, Norway
    Vet Res Commun 31:79-84. 2007
  5. ncbi request reprint [Human anaplasmosis--a hidden disease in Norway?]
    Snorre Stuen
    Seksjon for småfeforskning, Institutt for produksjonsdyrmedisin, Norges veterinaerhøgskole, 4325 Sandnes
    Tidsskr Nor Laegeforen 128:2579-81. 2008
  6. ncbi request reprint A paretic condition in an Anaplasma phagocytophilum infected roe deer calf
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Kyrkjevegen 332 334, N 4325 Sandnes, Norway
    J Wildl Dis 42:170-4. 2006
  7. pmc Unidirectional suppression of Anaplasma phagocytophilum genotypes in infected lambs
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Sandnes, Norway
    Clin Diagn Lab Immunol 12:1448-50. 2005
  8. ncbi request reprint Reduced weight gain due to subclinical Anaplasma phagocytophilum (formerly Ehrlichia phagocytophila) infection
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Kyrkjevegen 332 334, N 4325 Sandnes, Norway
    Exp Appl Acarol 28:209-15. 2002
  9. ncbi request reprint Fatal cases of Tick-borne fever (TBF) in sheep caused by several 16S rRNA gene variants of Anaplasma phagocytophilum
    S Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, N 4325 Sandnes, Norway
    Ann N Y Acad Sci 990:433-4. 2003
  10. pmc Differences in clinical manifestations and hematological and serological responses after experimental infection with genetic variants of Anaplasma phagocytophilum in sheep
    Snorre Stuen
    Department of Sheep and Goat Research, Norwegian School of Veterinary Science, Sandnes, Norway
    Clin Diagn Lab Immunol 10:692-5. 2003

Detail Information

Publications41

  1. pmc Occurrence of haemolytic Mannheimia spp. in apparently healthy sheep in Norway
    Louise L Poulsen
    Department of Veterinary Pathobiology, The Royal Veterinary and Agricultural University, 4 Stigbøljen, DK 1870 Frederiksberg C, Copenhagen, Denmark
    Acta Vet Scand 47:70. 2006
    ..The aim of the present study was to evaluate the occurrence of haemolytic Mannheimia species in apparently healthy sheep originating from four sheep flocks in South-Western Norway...
  2. ncbi request reprint Experimental infection in lambs with a red deer (Cervus elaphus) isolate of Anaplasma phagocytophilum
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Kyrkjeveien 332 334, N 4325 Sandnes, Norway
    J Wildl Dis 46:803-9. 2010
    ..We conclude that A. phagocytophilum strains causing TBF in sheep might circulate in the red deer population in Norway...
  3. pmc Superinfection occurs in Anaplasma phagocytophilum infected sheep irrespective of infection phase and protection status
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Sandnes, Norway
    Acta Vet Scand 51:41. 2009
    ..The bacteria may persist in mammalian hosts. Several genetic variants of A. phagocytophilum exist. In the present study, we investigate whether superinfection occurs in the acute and persistent phase of the infection...
  4. ncbi request reprint Anaplasma phagocytophilum - the most widespread tick-borne infection in animals in Europe
    S Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Sandnes, Norway
    Vet Res Commun 31:79-84. 2007
    ..Based on the 16S rRNA gene sequences several variants exist. Different variants may exist within the same herd and even simultaneously in the same animal. Variants may behave differently and interact in the mammalian host...
  5. ncbi request reprint [Human anaplasmosis--a hidden disease in Norway?]
    Snorre Stuen
    Seksjon for småfeforskning, Institutt for produksjonsdyrmedisin, Norges veterinaerhøgskole, 4325 Sandnes
    Tidsskr Nor Laegeforen 128:2579-81. 2008
    ..A. phagocytophilum is already a common infection among domestic ruminants and cervids in tick (Ixodes ricinus) infested areas in Norway...
  6. ncbi request reprint A paretic condition in an Anaplasma phagocytophilum infected roe deer calf
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Kyrkjevegen 332 334, N 4325 Sandnes, Norway
    J Wildl Dis 42:170-4. 2006
    ..Analyses for Borrelia burgdorferi sensu lato and tick-borne encephalitis (TBE) virus infections were negative. This is the first report of a possible paretic condition in A. phagocytophilum infected roe deer...
  7. pmc Unidirectional suppression of Anaplasma phagocytophilum genotypes in infected lambs
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Sandnes, Norway
    Clin Diagn Lab Immunol 12:1448-50. 2005
    ..The result of the study indicates a unidirectional suppression of genotypes in infected lambs, at least during a certain period of an A. phagocytophilum infection...
  8. ncbi request reprint Reduced weight gain due to subclinical Anaplasma phagocytophilum (formerly Ehrlichia phagocytophila) infection
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Kyrkjevegen 332 334, N 4325 Sandnes, Norway
    Exp Appl Acarol 28:209-15. 2002
    ..8 kg compared with the uninfected lambs. The present study indicates that A. phagocytophilum infection may be widespread and contribute to considerable productivity losses even on pastures with no apparent tick infestation...
  9. ncbi request reprint Fatal cases of Tick-borne fever (TBF) in sheep caused by several 16S rRNA gene variants of Anaplasma phagocytophilum
    S Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, N 4325 Sandnes, Norway
    Ann N Y Acad Sci 990:433-4. 2003
  10. pmc Differences in clinical manifestations and hematological and serological responses after experimental infection with genetic variants of Anaplasma phagocytophilum in sheep
    Snorre Stuen
    Department of Sheep and Goat Research, Norwegian School of Veterinary Science, Sandnes, Norway
    Clin Diagn Lab Immunol 10:692-5. 2003
    ..The results of the study indicate a marked difference in clinical manifestation, neutropenia, antibody response, and cross-protection after experimental infection with the two variants of A. phagocytophilum...
  11. ncbi request reprint Experimental infection of lambs with an equine granulocytic Ehrlichia species resembling the agent that causes human granulocytic ehrlichiosis (HGE)
    S Stuen
    Department of Sheep and Goat Research, Norwegian College of Veterinary Medicine, Sandnes, Norway
    Acta Vet Scand 39:491-7. 1998
    ..The results presented herein show that the equine Ehrlichia isolate was infective for lambs but generated weak immune response and no distinctive protection from subsequent challenge with E. phagocytophila...
  12. ncbi request reprint Antibodies to granulocytic Ehrlichia in moose, red deer, and roe deer in Norway
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Kyrkjevegen 332 334, N 4325 Sandnes, Norway
    J Wildl Dis 38:1-6. 2002
    ..17 +/- 0.646), 1:234 (2.37 +/- 0.424) and 1:676 (2.83 +/- 0.404), respectively. The present work indicates that all these wild ruminant species are exposed to granulocytic Ehrlichia in Norway...
  13. pmc Serological investigation of granulocytic Ehrlichia infection in sheep in Norway
    S Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Sandnes, Norway
    Acta Vet Scand 42:331-8. 2001
    ..The association between seropositive flocks and Ixodes infested pasture shows a very high degree of agreement (p < 0.00001). The present study indicates that granulocytic Ehrlichia infection in sheep is underdiagnosed in Norway...
  14. pmc The effect of two different oxytetracycline treatments in experimental Ehrlichia phagocytophila infected lambs
    S Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Sandnes, Norway
    Acta Vet Scand 42:339-46. 2001
    ..phagocytophila infected lambs. No difference was observed between the 2 treatment groups. However, at least 3 of 8 antibiotic treated lambs (37.5%) were still infected with granulocytic Ehrlichia 3 months after treatment...
  15. pmc Persistence of granulocytic Ehrlichia infection during wintertime in two sheep flocks in Norway
    S Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Sandnes, Norway
    Acta Vet Scand 42:347-53. 2001
    ..001). The present study indicates that sheep may be a reservoir host for granulocytic Ehrlichia infection from one grazing season to the next under natural conditions in Norway...
  16. pmc Persistence of Ehrlichia phagocytophila infection in two age groups of lambs
    S Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Sandnes, Norway
    Acta Vet Scand 42:453-8. 2001
    ..At the end of this period, the lambs were examined for a TBF infection by blood smear investigation and blood inoculation studies. The infection was demonstrated in 19 (95%) of the 20 lambs...
  17. ncbi request reprint Granulocytic ehrlichiosis in a roe deer calf in Norway
    S Stuen
    Norwegian School of Veterinary Science, Department of Sheep and Goat Research, Sandnes
    J Wildl Dis 37:614-6. 2001
    ..This is the first report of a possible clinical granulocytic Ehrlichia sp. infection in a roe deer...
  18. doi request reprint Prevalence of gastrointestinal helminths, lungworms and liver fluke in sheep and goats in Norway
    Atle V Meling Domke
    Norwegian School of Veterinary Science, Sandnes, Norway
    Vet Parasitol 194:40-8. 2013
    ..The present study indicates that H. contortus and Nematodirus battus have a wider geographical distribution to the north than expected, and describes to our knowledge the northernmost occurrence of H. contortus in the Nordic countries...
  19. pmc A morphological and molecular study of Anaplasma phagocytophilum transmission events at the time of Ixodes ricinus tick bite
    Erik G Granquist
    Department of Production Animal Clinical Sciences, Section of Small Ruminant Research, Norwegian School of Veterinary Science, Sandnes, N 4325 Norway
    Acta Vet Scand 52:43. 2010
    ..Anaplasma phagocytophilum is the causative agent of human granulocytic anaplasmosis (HGA) in humans and tick-borne fever (TBF) in ruminants. The bacterium invades and replicates in phagocytes, especially in polymorphonuclear granulocytes...
  20. pmc Prevalence of anthelmintic resistance in gastrointestinal nematodes of sheep and goats in Norway
    Atle V Meling Domke
    Norwegian School of Veterinary Science, Sandnes, Norway
    Parasitol Res 111:185-93. 2012
    ..New strategies and recommendations to face the emerging AR situation in Rogaland County in order to limit the spread of resistant nematodes within and into other areas are urgently needed...
  21. pmc Variant-specific and diminishing immune responses towards the highly variable MSP2(P44) outer membrane protein of Anaplasma phagocytophilum during persistent infection in lambs
    Erik G Granquist
    Department of Production Animal Clinical Sciences, Section of Small Ruminant Research, Norwegian School of Veterinary Science, Kyrkjevegen 332 334, Sandnes N 4325, Norway
    Vet Immunol Immunopathol 133:117-24. 2010
    ..In addition, there was a diminishing antibody response to MSP2(P44) and to other A. phagocytophilum antigens overall with time of infection, that was not associated with clearance of the infection...
  22. pmc Variant -and individual dependent nature of persistent Anaplasma phagocytophilum infection
    Erik G Granquist
    Department of Production Animal Clinical Sciences, Section of Small Ruminant Research, Norwegian School of Veterinary Science, Sandnes, N 4325, Norway
    Acta Vet Scand 52:25. 2010
    ..Little is known about how different strains of A. phagocytophilum propagate in their natural hosts during persistent infection...
  23. pmc Prophylactic treatment with flumethrin, a pyrethroid (Bayticol(®), Bayer), against Anaplasma phagocytophilum infection in lambs
    Snorre Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Kyrkjevegen 332 334, N 4325 Sandnes, Norway
    Acta Vet Scand 54:31. 2012
    ..Current control strategies are based on reduction of tick infestation by chemical acaricides...
  24. pmc Benzimidazole resistance of sheep nematodes in Norway confirmed through controlled efficacy test
    Atle V Meling Domke
    Norwegian School of Veterinary Science, Sandnes, Norway
    Acta Vet Scand 54:48. 2012
    ..A CET was therefore performed with larvae from two flocks where BZ resistance was previously detected through FECRT...
  25. pmc Identification of Anaplasma phagocytophila (formerly Ehrlichia phagocytophila) variants in blood from sheep in Norway
    Snorre Stuen
    Department of Sheep and Goat Research, Norwegian School of Veterinary Science, Sandnes, Norway
    J Clin Microbiol 40:3192-7. 2002
    ..Furthermore, only 43% of the A. phagocytophila variant 2-infected sheep displayed antibody responses in an immune fluorescence assay, whereas 93% of the sheep with the A. phagocytophila variant 1-infected sheep were seropositive...
  26. doi request reprint Anaplasma phagocytophilum variants in sympatric red deer (Cervus elaphus) and sheep in southern Norway
    Snorre Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Sandnes, Norway
    Ticks Tick Borne Dis 4:197-201. 2013
    ....
  27. pmc A comparative study of clinical manifestations, haematological and serological responses after experimental infection with Anaplasma phagocytophilum in two Norwegian sheep breeds
    Snorre Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Sandnes, Norway
    Acta Vet Scand 53:8. 2011
    ..The aim of the present study was to test this hypothesis in an experimental infection study...
  28. pmc Anaplasma phagocytophilum--a widespread multi-host pathogen with highly adaptive strategies
    Snorre Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science Sandnes, Norway
    Front Cell Infect Microbiol 3:31. 2013
    ..In the present review, we focus on the ecology and epidemiology of A. phagocytophilum, especially the role of wildlife in contribution to the spread and sustainability of the infection in domestic livestock and humans. ..
  29. pmc Anaplasma phagocytophilum infection in north Norway. The first laboratory confirmed case
    S Stuen
    Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, Sandnes, Norway
    Acta Vet Scand 46:167-71. 2005
  30. ncbi request reprint Possible exclusion of genotypes in Anaplasma phagocytophilum-infected lambs
    S Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Kyrkjeveien 332 334, N 4325 Sandnes, Norway
    Vet Rec 156:518-20. 2005
  31. ncbi request reprint Detection by the polymerase chain reaction of Anaplasma phagocytophilum in tissues of persistently infected sheep
    S Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Sandnes, Norway
    J Comp Pathol 134:101-4. 2006
    ..It seems possible that tick infestation amplifies A. phagocytophilum infections in carrier sheep to a degree that enables tick transmission to occur...
  32. doi request reprint Treatment and control of chlamydial and rickettsial infections in sheep and goats
    Snorre Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Kyrkjevegen 332 334, N 4325 Sandnes, Norway
    Vet Clin North Am Food Anim Pract 27:213-33. 2011
    ....
  33. pmc Outer membrane protein sequence variation in lambs experimentally infected with Anaplasma phagocytophilum
    Erik G Granquist
    Department of Production Animal Clinical Sciences, Section of Small Ruminant Research, Norwegian School of Veterinary Science, Kyrkjevegen 332 334, Sandnes N 4325, Norway
    Infect Immun 76:120-6. 2008
    ..phagocytophilum and the host immune system in naturally occurring persistent infections and provide an important comparison with enduring infections of cattle caused by A. marginale...
  34. pmc Worm control practice against gastro-intestinal parasites in Norwegian sheep and goat flocks
    Atle V M Domke
    Norwegian School of Veterinary Science, Sandnes, Norway
    Acta Vet Scand 53:29. 2011
    ..The aim of the present study was therefore to improve our knowledge about the worm control practices in small ruminant flocks in Norway...
  35. ncbi request reprint Cyclic variation in lambs infected with Anaplasma phagocytophilum
    S Stuen
    Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Kyrkjev 332 334 N 4325 Sandnes, Norway
    Vet Rec 163:338-40. 2008
  36. pmc Lambs immunized with an inactivated variant of Anaplasma phagocytophilum
    Snorre Stuen
    Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, Kyrkjevegen 332 334, 4325, Sandnes, Norway
    Acta Vet Scand 57:40. 2015
    ..An effective vaccine against the infection has been demanded for livestock by sheep farmers and veterinary practitioners for years...
  37. pmc High serum folate values in lambs experimentally infected with Anaplasma phagocytophilum
    K E Kleppa
    Department of Sheep and Goat Research, Norwegian School of Veterinary Science, Sandnes, Norway
    Acta Vet Scand 44:199-202. 2003
  38. pmc Dynamic transmission of numerous Anaplasma phagocytophilum genotypes among lambs in an infected sheep flock in an area of anaplasmosis endemicity
    Georgia A F Ladbury
    Department of Veterinary Pathology, Faculty of Veterinary Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Cheshire CH64 7TE, United Kingdom
    J Clin Microbiol 46:1686-91. 2008
    ..phagocytophilum strains simultaneously circulating within an infected population in an area of endemicity and are consistent with a remarkably dynamic transmission of strains among infected animals...
  39. ncbi request reprint High seroprevalence of granulocytic ehrlichiosis distinguishes sheep that were the source of an alimentary epidemic of tick-borne encephalitis
    Petr Zeman
    Regional Center of Hygiene, Prague, Czech Republic
    Wien Klin Wochenschr 116:614-6. 2004
    ..01). The authors hypothesize that the immunosuppressive effect of TBF co-infection in sheep could be a contributory cause of TBE-virus contamination of milk, an aspect of TBE epidemiology that has not been considered thus far...
  40. pmc Structure of the expression site reveals global diversity in MSP2 (P44) variants in Anaplasma phagocytophilum
    Anthony F Barbet
    Department of Infectious Diseases and Pathology, University of Florida, Gainesville, FL 32611 0880, USA, and Department of Clinical Microbiology, Kalmar County Hospital, Sweden
    Infect Immun 74:6429-37. 2006
    ..These data suggest similar genetic mechanisms for A. phagocytophilum variation in all hosts but worldwide diversity of the MSP2 (P44) outer membrane protein...
  41. pmc Sequence analysis of the msp4 gene of Anaplasma phagocytophilum strains
    Jose De La Fuente
    Department of Veterinary Pathobiology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078, USA
    J Clin Microbiol 43:1309-17. 2005
    ..These results suggest that A. phagocytophilum strains from ruminants could share some common characteristics, including reservoirs and pathogenicity, which may be different from strains that infect humans...