Research Topics
| Søren S NielsenSummaryAffiliation: The Royal Veterinary and Agricultural University Country: Denmark Publications
| Collaborators
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Detail Information
Publications
Bulk-tank milk ELISA antibodies for estimating the prevalence of paratuberculosis in Danish dairy herdsS 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...- Age at occurrence of Mycobacterium avium subspecies paratuberculosis in naturally infected dairy cowsS 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... - Age-specific characteristics of ELISA and fecal culture for purpose-specific testing for paratuberculosisS 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... - Comparison of contamination and growth of Mycobacterium avium subsp. paratuberculosis on two different mediaS 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)... - Variation of the milk antibody response to paratuberculosis in naturally infected dairy cowsS 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.... - Variance components of an enzyme-linked immunosorbent assay for detection of IgG antibodies in milk samples to Mycobacterium avium subspecies paratuberculosis in dairy cattleS 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... - The Mycobacterium avium subsp. paratuberculosis ELISA response by parity and stage of lactationSøren 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... - Paratuberculosis in dairy cattle: variation of the antibody response in offspring attributable to the damS 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... - Maximum-likelihood estimation of sensitivity and specificity of ELISAs and faecal culture for diagnosis of paratuberculosisSøren 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... - Bovine virus diarrhea virus in free-living deer from DenmarkS 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... 
Annual incidence, prevalence and transmission characteristics of Streptococcus agalactiae in Danish dairy herdsMarshal 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...
Association between antibodies to Coxiella burnetii in bulk tank milk and perinatal mortality of Danish dairy calvesKatrine 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)...- Summary receiver operating characteristics (SROC) and hierarchical SROC models for analysis of diagnostic test evaluations of antibody ELISAs for paratuberculosisNils 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... - Comparative host specificity of human- and pig- associated Staphylococcus aureus clonal lineagesArshnee 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... - Modeling the effect of direct and indirect contamination of on-farm bulk tank milk with Mycobacterium avium subsp. paratuberculosisHisako 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... - Evaluation of two herd-level diagnostic tests for Streptococcus agalactiae using a latent class approachMarshal 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... - High risk for nasal carriage of methicillin-resistant Staphylococcus aureus among Danish veterinary practitionersArshnee 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...