Søren S Nielsen

Summary

Affiliation: The Royal Veterinary and Agricultural University
Country: Denmark

Publications

  1. ncbi Bulk-tank milk ELISA antibodies for estimating the prevalence of paratuberculosis in Danish dairy herds
    S S Nielsen
    Cattle Health Laboratory, Danish Dairy Board, Ladelundvej 85A, 6650, Brorup, Denmark
    Prev Vet Med 44:1-7. 2000
  2. ncbi Age at occurrence of Mycobacterium avium subspecies paratuberculosis in naturally infected dairy cows
    S S Nielsen
    Department of Large Animal Sciences, The Royal Veterinary and Agricultural University, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark
    J Dairy Sci 89:4557-66. 2006
  3. ncbi Age-specific characteristics of ELISA and fecal culture for purpose-specific testing for paratuberculosis
    S S Nielsen
    Department of Large Animal Sciences, The Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
    J Dairy Sci 89:569-79. 2006
  4. ncbi Comparison of contamination and growth of Mycobacterium avium subsp. paratuberculosis on two different media
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
    J Appl Microbiol 96:149-53. 2004
  5. ncbi Variation of the milk antibody response to paratuberculosis in naturally infected dairy cows
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Grønnegårdevej 8, DK 1870 Frederiksberg C, Denmark
    J Dairy Sci 85:2795-802. 2002
  6. ncbi Variance components of an enzyme-linked immunosorbent assay for detection of IgG antibodies in milk samples to Mycobacterium avium subspecies paratuberculosis in dairy cattle
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
    J Vet Med B Infect Dis Vet Public Health 49:384-7. 2002
  7. ncbi The Mycobacterium avium subsp. paratuberculosis ELISA response by parity and stage of lactation
    Søren S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark
    Prev Vet Med 54:1-10. 2002
  8. ncbi Paratuberculosis in dairy cattle: variation of the antibody response in offspring attributable to the dam
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
    J Dairy Sci 85:406-12. 2002
  9. ncbi Maximum-likelihood estimation of sensitivity and specificity of ELISAs and faecal culture for diagnosis of paratuberculosis
    Søren S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Grønnegårdsvej 8, DK 1870 C, Frederiksberg, Denmark
    Prev Vet Med 53:191-204. 2002
  10. ncbi Bovine virus diarrhea virus in free-living deer from Denmark
    S S Nielsen
    Cattle Health Laboratory, Brørup, Denmark
    J Wildl Dis 36:584-7. 2000

Collaborators

Detail Information

Publications20

  1. ncbi Bulk-tank milk ELISA antibodies for estimating the prevalence of paratuberculosis in Danish dairy herds
    S S Nielsen
    Cattle Health Laboratory, Danish Dairy Board, Ladelundvej 85A, 6650, Brorup, Denmark
    Prev Vet Med 44:1-7. 2000
    ..The infection is more widespread than previous investigations have shown...
  2. ncbi Age at occurrence of Mycobacterium avium subspecies paratuberculosis in naturally infected dairy cows
    S S Nielsen
    Department of Large Animal Sciences, The Royal Veterinary and Agricultural University, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark
    J Dairy Sci 89:4557-66. 2006
    ..These antibodies can be detected by ELISA with a test strategy that is different for younger and older cows. We suggest testing younger cows more frequently than older cows and that testing should be done prior to 350 d in milk...
  3. ncbi Age-specific characteristics of ELISA and fecal culture for purpose-specific testing for paratuberculosis
    S S Nielsen
    Department of Large Animal Sciences, The Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
    J Dairy Sci 89:569-79. 2006
    ..Purpose-specific tests are required to appropriately interpret and use test results for management of paratuberculosis, and relevant covariates, such as age, should be included when possible...
  4. ncbi Comparison of contamination and growth of Mycobacterium avium subsp. paratuberculosis on two different media
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
    J Appl Microbiol 96:149-53. 2004
    ..The purpose of the study was to compare the growth of Mycobacterium avium subsp. paratuberculosis (Map) and the degree of contamination on Herrold's egg yolk medium (HEYM) and modified Löwenstein-Jensen medium (LJ)...
  5. ncbi Variation of the milk antibody response to paratuberculosis in naturally infected dairy cows
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Grønnegårdevej 8, DK 1870 Frederiksberg C, Denmark
    J Dairy Sci 85:2795-802. 2002
    ....
  6. ncbi Variance components of an enzyme-linked immunosorbent assay for detection of IgG antibodies in milk samples to Mycobacterium avium subspecies paratuberculosis in dairy cattle
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
    J Vet Med B Infect Dis Vet Public Health 49:384-7. 2002
    ..9). Therefore, it was concluded that the intraplate variability could be ignored whereas the variability from the combined run-day-plate variable should be considered in any analyses based on the ELISA...
  7. ncbi The Mycobacterium avium subsp. paratuberculosis ELISA response by parity and stage of lactation
    Søren S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark
    Prev Vet Med 54:1-10. 2002
    ..Some issues related to the pathogenesis are also discussed...
  8. ncbi Paratuberculosis in dairy cattle: variation of the antibody response in offspring attributable to the dam
    S S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
    J Dairy Sci 85:406-12. 2002
    ..It was concluded that the parental contribution was significant, and both heritability of susceptibility and vertical transmission should be considered in any control programs on paratuberculosis in dairy cattle...
  9. ncbi Maximum-likelihood estimation of sensitivity and specificity of ELISAs and faecal culture for diagnosis of paratuberculosis
    Søren S Nielsen
    Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Grønnegårdsvej 8, DK 1870 C, Frederiksberg, Denmark
    Prev Vet Med 53:191-204. 2002
    ..These results emphasise the importance of the composition of a target population before selecting a specific diagnostic test for a given purpose. We concluded that faecal culture is useful for confirmation but not for screening purposes...
  10. ncbi Bovine virus diarrhea virus in free-living deer from Denmark
    S S Nielsen
    Cattle Health Laboratory, Brørup, Denmark
    J Wildl Dis 36:584-7. 2000
    ..Hence, the possibility of free-living deer as a source of infection for cattle in Denmark seems to be remote...
  11. doi Temporal characterisation of the network of Danish cattle movements and its implication for disease control: 2000-2009
    Marshal M Mweu
    Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark
    Prev Vet Med 110:379-87. 2013
    ..The network was sparsely connected with markets being the key influential holdings. Its vulnerability to removal of markets suggests that targeting highly connected holdings during epidemics should be the focus of control efforts...
  12. doi Modeling the effect of direct and indirect contamination of on-farm bulk tank milk with Mycobacterium avium subsp. paratuberculosis
    Hisako Okura
    Department of Large Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
    Foodborne Pathog Dis 10:270-7. 2013
    ..Further knowledge on distribution of fecal excretion from infected cows is required because very few "super-shedders" might play a major role...
  13. doi Annual incidence, prevalence and transmission characteristics of Streptococcus agalactiae in Danish dairy herds
    Marshal M Mweu
    Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark
    Prev Vet Med 106:244-50. 2012
    ..1 (95% CI 5.6-8.9); non-infection related exit rate 9.2 (95% CI 7.4-11.5) and recovery rate 40.0 (95% CI 36.8-43.5). This study demonstrates a need to tighten the current controls against S. agalactiae in order to lower its incidence...
  14. pmc Association between antibodies to Coxiella burnetii in bulk tank milk and perinatal mortality of Danish dairy calves
    Katrine T Nielsen
    Department of Large Animal Sciences, Faculty of Life Sciences, University of Copenhagen, Frederiksberg C, Denmark
    Acta Vet Scand 53:64. 2011
    ..burnetii on two outcomes associated with parturition in cattle: a) stillbirth; and b) stillbirth and neonatal mortality combined (perinatal death)...
  15. doi Spatiotemporal patterns, annual baseline and movement-related incidence of Streptococcus agalactiae infection in Danish dairy herds: 2000-2009
    Marshal M Mweu
    Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark Electronic address
    Prev Vet Med 113:219-30. 2014
    ..Nevertheless, the results signal a need to beef up within-herd biosecurity in order to reduce the risk of new herd infections. ..
  16. pmc Comparative host specificity of human- and pig- associated Staphylococcus aureus clonal lineages
    Arshnee Moodley
    Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
    PLoS ONE 7:e49344. 2012
    ..However, our in vitro and in vivo experiments revealed an unexpected ability of ST8 to adhere to porcine corneocytes and persist in the nasal cavity of pigs...
  17. ncbi Summary receiver operating characteristics (SROC) and hierarchical SROC models for analysis of diagnostic test evaluations of antibody ELISAs for paratuberculosis
    Nils Toft
    Department of Large Animal Sciences, Faculty of Life Sciences, University of Copenhagen, Frederiksberg C, Denmark
    Prev Vet Med 92:249-55. 2009
    ..The conclusion is that while the SROC is simpler and easier to implement, analyse and interpret, the HSROC does have properties encourage the extra effort involved in the analysis...
  18. doi Effect of carryover and presampling procedures on the results of real-time PCR used for diagnosis of bovine intramammary infections with Streptococcus agalactiae at routine milk recordings
    Yasser S Mahmmod
    HERD Centre for Herd oriented Education, Research and Development, Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 2, DK 1870 Frederiksberg C, Denmark Infectious Diseases, Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig City 44511, Sharkia Province, Egypt Electronic address
    Prev Vet Med 113:512-21. 2014
    ..In relative terms, higher cut-offs resulted in higher between-cow correlation, but the absolute amount of carryover may not be affected although this was not tested. ..
  19. doi Evaluation of two herd-level diagnostic tests for Streptococcus agalactiae using a latent class approach
    Marshal M Mweu
    Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, DK 1870 Frederiksberg C, Denmark
    Vet Microbiol 159:181-6. 2012
    ..However, for higher Ct values, confirmation of PCR test positive herds by bacteriological culture is advisable especially when the between-herd prevalence of S. agalactiae is low...
  20. ncbi High risk for nasal carriage of methicillin-resistant Staphylococcus aureus among Danish veterinary practitioners
    Arshnee Moodley
    Department of Veterinary Pathobiology, Stigbøjlen 4, Frederiksberg C, Denmark
    Scand J Work Environ Health 34:151-7. 2008
    ..After the recently described emergence of MRSA in animals, the authors investigated the risk of nasal MRSA carriage among people with professional contact with animals...