I R Dohoo

Summary

Affiliation: University of Prince Edward Island
Country: Canada

Publications

  1. ncbi request reprint Evaluation of the stability of Ostertagia ostertagi ELISA microtitre plates over time using cow milk samples
    Fortune Sithole
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI C1A 4P3, Canada
    Vet Parasitol 133:329-37. 2005
  2. doi request reprint Quantitative epidemiology: progress and challenges
    Ian R Dohoo
    Department of Health Management, University of Prince Edward Island, Charlottetown PEI C1A 4P3, Canada
    Prev Vet Med 86:260-9. 2008
  3. doi request reprint Multiple imputation in veterinary epidemiological studies: a case study and simulation
    Ian R Dohoo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, C1A 4P3, Canada Electronic address
    Prev Vet Med 129:35-47. 2016
  4. doi request reprint Dealing with deficient and missing data
    Ian R Dohoo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI C1A 4P3, Canada Electronic address
    Prev Vet Med 122:221-8. 2015
  5. doi request reprint Bias--is it a problem, and what should we do?
    Ian R Dohoo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI C1A 4P3, Canada Electronic address
    Prev Vet Med 113:331-7. 2014
  6. ncbi request reprint The design of randomized controlled trials of veterinary vaccines
    Ian R Dohoo
    Department of Health Management, University of Prince Edward Island, Charlottetown, C1A 4P3, Canada
    Anim Health Res Rev 5:235-8. 2004
  7. doi request reprint Diagnosing intramammary infections: evaluation of definitions based on a single milk sample
    I R Dohoo
    Centre for Veterinary Epidemiological Research, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada C1A 4P3
    J Dairy Sci 94:250-61. 2011
  8. pmc A meta-analysis review of the effects of recombinant bovine somatotropin. 2. Effects on animal health, reproductive performance, and culling
    I R Dohoo
    Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island C1A 4P3
    Can J Vet Res 67:252-64. 2003
  9. pmc A meta-analysis review of the effects of recombinant bovine somatotropin. 1. Methodology and effects on production
    I R Dohoo
    Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island C1A 4P3
    Can J Vet Res 67:241-51. 2003
  10. doi request reprint Diagnosing intramammary infections: comparison of multiple versus single quarter milk samples for the identification of intramammary infections in lactating dairy cows
    I Dohoo
    Centre for Veterinary Epidemiological Research, University of Prince Edward Island, Charlottetown, PE, Canada
    J Dairy Sci 94:5515-22. 2011

Detail Information

Publications79

  1. ncbi request reprint Evaluation of the stability of Ostertagia ostertagi ELISA microtitre plates over time using cow milk samples
    Fortune Sithole
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI C1A 4P3, Canada
    Vet Parasitol 133:329-37. 2005
    ..The storage of plates blocked with svan and stab agents under room temperature, makes them more convenient to use and transport relative to bsa-blocked plates that have to be frozen...
  2. doi request reprint Quantitative epidemiology: progress and challenges
    Ian R Dohoo
    Department of Health Management, University of Prince Edward Island, Charlottetown PEI C1A 4P3, Canada
    Prev Vet Med 86:260-9. 2008
    ..Areas discussed are: methods for analyzing hierarchical data, Bayesian methods, survival analysis and integrating causal thinking and statistical analyses...
  3. doi request reprint Multiple imputation in veterinary epidemiological studies: a case study and simulation
    Ian R Dohoo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, C1A 4P3, Canada Electronic address
    Prev Vet Med 129:35-47. 2016
    ..While the benefit of MI varied with the mechanism used to generate the missing data, MI always performed as well as, or better than, CC analysis. ..
  4. doi request reprint Dealing with deficient and missing data
    Ian R Dohoo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI C1A 4P3, Canada Electronic address
    Prev Vet Med 122:221-8. 2015
    ..The use of multiple imputation to deal with the problem of item missing data will be compared to the use of complete-case analysis, and limitations to the applicability of imputation will be presented. ..
  5. doi request reprint Bias--is it a problem, and what should we do?
    Ian R Dohoo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI C1A 4P3, Canada Electronic address
    Prev Vet Med 113:331-7. 2014
    ..Methods of dealing with systematic errors include: qualitative assessment, quantitative bias analysis and incorporation of bias parameters into the statistical analyses. ..
  6. ncbi request reprint The design of randomized controlled trials of veterinary vaccines
    Ian R Dohoo
    Department of Health Management, University of Prince Edward Island, Charlottetown, C1A 4P3, Canada
    Anim Health Res Rev 5:235-8. 2004
    ..Finally, while there is no easy solution (except to conduct group-level trials, which may be logistically impossible), the potential for group effects to influence the trial outcome must be considered...
  7. doi request reprint Diagnosing intramammary infections: evaluation of definitions based on a single milk sample
    I R Dohoo
    Centre for Veterinary Epidemiological Research, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada C1A 4P3
    J Dairy Sci 94:250-61. 2011
    ..For "any organism," using definition B raised the Sp to 88 and 93% in the 2 data sets, respectively. The final choice of definition will depend on the objectives of study or control program for which the sample was collected...
  8. pmc A meta-analysis review of the effects of recombinant bovine somatotropin. 2. Effects on animal health, reproductive performance, and culling
    I R Dohoo
    Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island C1A 4P3
    Can J Vet Res 67:252-64. 2003
    ..Use of the drug in 1 lactation period appeared to reduce the risk of metabolic diseases (particularly ketosis) in the early period of the subsequent lactation...
  9. pmc A meta-analysis review of the effects of recombinant bovine somatotropin. 1. Methodology and effects on production
    I R Dohoo
    Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island C1A 4P3
    Can J Vet Res 67:241-51. 2003
    ..Despite the increase in dry matter intake, treated animals had lower body condition scores at the end of the treatment period, and the reduced scores persisted through until the start of the subsequent lactation...
  10. doi request reprint Diagnosing intramammary infections: comparison of multiple versus single quarter milk samples for the identification of intramammary infections in lactating dairy cows
    I Dohoo
    Centre for Veterinary Epidemiological Research, University of Prince Edward Island, Charlottetown, PE, Canada
    J Dairy Sci 94:5515-22. 2011
    ..Overall, triplicate samples provided the best combination of Se and Sp, but compared with a single sample, provided only a modest gain in Sp and little or no gain in Se...
  11. ncbi request reprint Evaluation of underlying risk as a source of heterogeneity in meta-analyses: a simulation study of Bayesian and frequentist implementations of three models
    Ian Dohoo
    Department of Health Management, University of Prince Edward Island, Charlottetown, PEI, Canada
    Prev Vet Med 81:38-55. 2007
    ..A model based on the assumption that the number of positive events in each of the treatment and control groups are binomially distributed (Model 1) is the recommended approach...
  12. ncbi request reprint The use of multilevel models to evaluate sources of variation in reproductive performance in dairy cattle in Reunion Island
    I R Dohoo
    University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, PEI, C1A 4P3, Charlottetown, Canada
    Prev Vet Med 50:127-44. 2001
    ....
  13. doi request reprint Associations between reproductive performance and seropositivity for bovine leukemia virus, bovine viral-diarrhea virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum in Canadian dairy cows
    J A Vanleeuwen
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550, University Avenue, Charlottetown, PE, Canada
    Prev Vet Med 94:54-64. 2010
    ..The overall FSC was 51%, the average CI was 393 days, and 18%, 9% and 5% of lactations had CI>484 days, >534 days, and >584 days, respectively...
  14. doi request reprint Risk factors associated with Neospora caninum seropositivity in randomly sampled Canadian dairy cows and herds
    J A Vanleeuwen
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Ave, Charlottetown, PE, Canada C1A 4P3
    Prev Vet Med 93:129-38. 2010
    ..caninum. "Number of milk cows on the farm" (OR=0.99), and "area (acres) used for forage production" (OR=0.99) were continuous variables negatively associated with N. caninum seropositivity...
  15. doi request reprint Risk factors for bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Part 1: overall risk factors
    A M Elmoslemany
    Department of Health Management, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3, Canada
    J Dairy Sci 92:2634-43. 2009
    ..In conclusion, this study highlights the importance of udder hygiene and milking system washing factors on hygienic quality of bulk tank milk...
  16. doi request reprint The association between bulk tank milk analysis for raw milk quality and on-farm management practices
    A M Elmoslemany
    Department of Health Management, University of Prince Edward Island, Charlottetown, PEI, C1A 4P3, Canada
    Prev Vet Med 95:32-40. 2010
    ..Season was a significant predictor for all bacterial counts with the lowest counts tending to occur in winter...
  17. doi request reprint Risk factors for bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Part 2: bacteria count-specific risk factors
    A M Elmoslemany
    Department of Health Management, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3, Canada
    J Dairy Sci 92:2644-52. 2009
    ..Based on the findings of this study it can be concluded that TAC, PIC, LPC, and CC counts are of considerable value in identifying practices that could influence milk quality...
  18. ncbi request reprint Relationships between bulk-tank antibodies to Ostertagia ostertagi and herd-management practices and measures of milk production in Nova Scotia dairy herds
    F J Guitian
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada C1A 4P3
    Prev Vet Med 47:79-89. 1999
    ..An increase in the OD from 0.58 to 0.83 (the interquartile range of ODs) was associated with a reduction in production of 1.25kg/cow/day...
  19. pmc Effect of ascariasis and respiratory diseases on growth rates in swine
    T M Bernardo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown
    Can J Vet Res 54:278-84. 1990
    ..6% lower ADG than hogs with neither disease. There is much greater potential for improvement in ADG through control of respiratory diseases than through control of ascariasis...
  20. ncbi request reprint Historical control clinical trial to assess the effectiveness of teflubenzuron for treating sea lice on Atlantic salmon
    P J Campbell
    Department of Health Management, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
    Dis Aquat Organ 70:109-14. 2006
    ..Our results show that the effects of teflubenzuron are limited to a 3 wk duration, but that with appropriate management, farms could benefit from these reduced lice burdens for longer periods...
  21. doi request reprint Risk factors associated with Mycobacterium avium subspecies paratuberculosis seropositivity in Canadian dairy cows and herds
    A Tiwari
    Department of Health Management, Atlantic Veterinary College AVC, University of Prince Edward Island UPEI, 550 University Avenue, Charlottetown, PEI, Canada C1A 4P3
    Prev Vet Med 88:32-41. 2009
    ..3, 1.9, 1.4 and 1.8, respectively. The variable "BVDV vaccination (modified live) done properly in calves" (i.e. received another modified live vaccination after 6 months as well) was associated with 0.4 times fewer MAP-seropositive cows...
  22. pmc Bulk tank milk urea nitrogen: seasonal patterns and relationship to individual cow milk urea nitrogen values
    P Arunvipas
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island
    Can J Vet Res 68:169-74. 2004
    ..Using linear mixed modelling, significantly (P < 0.05) higher BTMUN values were found during the mid and late pasture seasons of 2000, likely because the precipitation was unusually high during this period, enhancing pasture growth...
  23. doi request reprint Diagnosing intramammary infections: evaluating expert opinions on the definition of intramammary infection using conjoint analysis
    S Andersen
    Centre for Veterinary Epidemiological Research, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3 Canada
    J Dairy Sci 93:2966-75. 2010
    ....
  24. ncbi request reprint Increase in milk yield following eprinomectin treatment at calving in pastured dairy cattle
    Ane Nødtvedt
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada
    Vet Parasitol 105:191-206. 2002
    ..Eliminating the present subclinical parasite burdens produced a consistent increase in milk production that can yield economic benefits for the dairy producer...
  25. pmc A bulk tank milk survey of Ostertagia ostertagi antibodies in dairy herds in Prince Edward Island and their relationship with herd management factors and milk yield
    Javier Sanchez
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3
    Can Vet J 43:454-9. 2002
    ..ostertagi antibody is a potentially useful technique to measure parasite exposure in adult dairy cows and that parasite burdens in lactating cattle in PEI have an important impact on milk production...
  26. ncbi request reprint The effect of non-nutritional factors on milk urea nitrogen levels in dairy cows in Prince Edward Island, Canada
    P Arunvipas
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island UPEI, 550 University Avenue, PEI, C1A 4P3, Charlottetown, Canada
    Prev Vet Med 59:83-93. 2003
    ..The variation at the herd and cow levels in the model were 19.7 and 19.0%, respectively; while the variation at the test date level was 61.3%. The non-nutritional factors studied explained 13.3% of the variation in MUN...
  27. doi request reprint Milk selenium concentration and its association with udder health in Atlantic Canadian dairy herds
    A Ceballos-Marquez
    Centre for Veterinary Epidemiological Research, Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI C1A 4P3, Canada
    J Dairy Sci 93:4700-9. 2010
    ..Therefore, under the current management conditions, milk Se concentration did not appear to be a principal determinant of udder health...
  28. ncbi request reprint Risk factors associated with mortalities attributed to infectious salmon anaemia virus in New Brunswick, Canada
    K L Hammell
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
    J Fish Dis 28:651-61. 2005
    ..Despite very close proximity between sites, modification of these management factors would probably influence the severity of mortalities caused by ISAV...
  29. pmc The use of negative binomial modelling in a longitudinal study of gastrointestinal parasite burdens in Canadian dairy cows
    Ane Nødtvedt
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown
    Can J Vet Res 66:249-57. 2002
    ..In herds where pasture use was more extensive, the cattle had higher fecal egg counts. The difference in pasture exposure was found to be a main contributor to an observed difference in fecal egg counts among herds in the 4 provinces...
  30. doi request reprint Evaluation of a 3M Petrifilm on-farm culture system for the detection of intramammary infection at the end of lactation
    M Cameron
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI C1A 4P3, Canada
    Prev Vet Med 111:1-9. 2013
    ..The agreement between Petrifilm results obtained by the producer and those obtained by the automated Petrifilm reader was high, with a kappa value of 0.82 (0.75-0.89)...
  31. doi request reprint Laboratory evaluation of 3M Petrifilms and University of Minnesota Bi-plates as potential on-farm tests for clinical mastitis
    J L McCarron
    Department of Health Management, University of Prince Edward Island, Charlottetown, PEI, C1A 4P3 Canada
    J Dairy Sci 92:2297-305. 2009
    ..The results of this study indicate that both tests were able to appropriately categorize cases, which could potentially result in a reduction in the quantity of antibiotics used to treat clinical cases of mastitis...
  32. doi request reprint Evaluation of the University of Minnesota Tri-plate and 3M Petrifilm for the isolation of Staphylococcus aureus and Streptococcus species from clinically mastitic milk samples
    J L McCarron
    Atlantic Veterinary College Department of Health Management, University of Prince Edward Island, Charlottetown, PEI, Canada
    J Dairy Sci 92:5326-33. 2009
    ..aureus in clinical milk samples when used in a laboratory setting and the Tri-plate successfully differentiated Streptococcus spp. from other gram-positive organisms...
  33. doi request reprint Diagnosing intramammary infections: evaluation of composite milk samples to detect intramammary infections
    K K Reyher
    Centre for Veterinary Epidemiological Research, University of Prince Edward Island, Charlottetown, PEI, C1A 4P3, Canada
    J Dairy Sci 94:3387-96. 2011
    ..Composite samples can be used to detect IMI and new IMI in dairy cows, but the Se and Sp of the procedure should be taken into account...
  34. doi request reprint Microbiological quality of bulk tank raw milk in Prince Edward Island dairy herds
    A M Elmoslemany
    Department of Health Management, University of Prince Edward Island, Charlottetown, Canada
    J Dairy Sci 92:4239-48. 2009
    ..Seasonal data indicate that 1) in general, all counts tended to be low in winter, 2) the CC and somatic cell count were always high in summer, and 3) TAC tended to be high during summer...
  35. ncbi request reprint Production effects of pathogens causing bovine leukosis, bovine viral diarrhea, paratuberculosis, and neosporosis
    A Tiwari
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Canada C1A 4P3
    J Dairy Sci 90:659-69. 2007
    ..Results from this research will contribute to understanding the economic impacts of these pathogens and justify their control...
  36. ncbi request reprint Risk factors for milk off-flavours in dairy herds from Prince Edward Island, Canada
    A Mounchili
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island, Canada C1A 4P3
    Prev Vet Med 64:133-45. 2004
    ..12) were protective. The finding about feeding baled silage before milking has raised hypotheses about silage composition (in particular the off-flavour compounds or their precursors) and also about the process of silage making itself...
  37. ncbi request reprint Mortality patterns in infectious salmon anaemia virus outbreaks in New Brunswick, Canada
    K L Hammell
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
    J Fish Dis 28:639-50. 2005
    ..The median duration of outbreaks in net pens for which the fish were not slaughtered during the outbreak was 33 days and the median total loss in those outbreaks was 6600 per 100 000 fish...
  38. ncbi request reprint Interaction of water temperature and challenge model on xenoma development rates for Loma salmonae (Microspora) in rainbow trout, Oncorhynchus mykiss (Walbaum)
    J A Becker
    Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
    J Fish Dis 29:139-45. 2006
    ..Overall, the impact of water temperature on disease pathogenesis was greater when the RBT were per os challenged compared with using the cohabitation model...
  39. doi request reprint Monitoring herd incidence of intramammary infection in lactating cows using repeated longitudinal somatic cell count measurements
    S Dufour
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Ave, Charlottetown, C1A 4P3, Canada
    J Dairy Sci 96:1568-80. 2013
    ..Composite SCCI was strictly associated with major IMI BCI, showed a relatively low correlation with the observed rate (Spearman rho: 0.14), and was of little help for longitudinal monitoring of the IMI incidence...
  40. ncbi request reprint Test characteristics from latent-class models of the California Mastitis Test
    C J Sanford
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada
    Prev Vet Med 77:96-108. 2006
    ..The negative predictive value of the CMT was >95% for herds with major-pathogen intramammary-infection prevalence <15%, so that selective dry-cow therapy might be reasonable for such herds if cows were screened with the CMT...
  41. doi request reprint Evaluation of selective dry cow treatment following on-farm culture: Milk yield and somatic cell count in the subsequent lactation
    M Cameron
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada C1A 4P3 Electronic address
    J Dairy Sci 98:2427-36. 2015
    ..The results of this study indicate that selective DCT based on results obtained by the Petrifilm on-farm culture system enabled a reduction in the use of DCT without negatively affecting milk production and milk quality...
  42. doi request reprint Evaluation of selective dry cow treatment following on-farm culture: risk of postcalving intramammary infection and clinical mastitis in the subsequent lactation
    M Cameron
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada C1A 4P3 Electronic address
    J Dairy Sci 97:270-84. 2014
    ....
  43. doi request reprint Monitoring dry period intramammary infection incidence and elimination rates using somatic cell count measurements
    S Dufour
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
    J Dairy Sci 95:7173-85. 2012
    ..Results from the current study suggest that quarter and composite SCC-derived rates could be used as substitutes for bacteriological culture-derived rates for some groups of mastitis pathogens...
  44. ncbi request reprint Model to predict septicemia in diarrheic calves
    J Lofstedt
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Canada
    J Vet Intern Med 13:81-8. 1999
    ..The positive and negative predictive values of the models were 66-82%, which indicated the proportion of cases for which a predictive result would be correct in a population with a prevalence of septicemia of 31%...
  45. ncbi request reprint Factors influencing the prevalence of Salmonella spp. in swine farms: a meta-analysis approach
    J Sanchez
    Centre for Veterinary Epidemiological Research, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island, Canada
    Prev Vet Med 81:148-77. 2007
    ..The analysis provides some guidelines when interpreting and comparing apparent Salmonella prevalence results from studies using different study designs...
  46. doi request reprint Barium selenate supplementation and its effect on intramammary infection in pasture-based dairy cows
    A Ceballos
    Departamento de Sistemas de Producción, Universidad de Caldas, Manizales, Colombia
    J Dairy Sci 93:1468-77. 2010
    ....
  47. ncbi request reprint The use of an indirect Ostertagia ostertagi ELISA to predict milk production response after anthelmintic treatment in confined and semi-confined dairy herds
    Javier Sanchez
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI C1A 4P3, Canada
    Vet Parasitol 130:115-24. 2005
    ..02), with some evidence of positive treatment response in cows with an ODR > 0.4. The relationship between pre-calving ODR and production response appeared to be quadratic rather than linear...
  48. doi request reprint The impact of milk handling procedures on Ostertagia ostertagi antibody ELISA test results
    Raphaël Vanderstichel
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada
    Vet Parasitol 169:204-8. 2010
    ..Frozen whole milk processed by DHI programs, the most likely method of collecting on-farm samples in North America, will likely yield reliable results for the indirect ELISA tests, particularly, Svanovir...
  49. ncbi request reprint A meta-analysis of the milk-production response after anthelmintic treatment in naturally infected adult dairy cows
    Javier Sanchez
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI, Canada C1A 4P3
    Prev Vet Med 63:237-56. 2004
    ..Trials reporting the results as total 305-day milk production had lower response compared with trials which measured production as daily milk weight. Primiparous cows trials had lower responses compared with multiparous cows trials...
  50. doi request reprint Traditional descriptive analysis and novel visual representation of diagnostic repeatability and reproducibility: application to an infectious salmon anaemia virus RT-PCR assay
    Charles Caraguel
    Centre for Aquatic Health Sciences, Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI C1A 4P3 Canada
    Prev Vet Med 92:9-19. 2009
    ..The resulting phylogram illustrated the proximity of test findings between repeated samples within a laboratory and between laboratories, and facilitated the interpretation of the agreement levels...
  51. doi request reprint Using pseudogold standards and latent-class analysis in combination to evaluate the accuracy of three diagnostic tests
    Pascale Nérette
    Department of Health Management, Atlantic Veterinary College, University of PEI, Charlottetown, PEI C1A 4P3, Canada
    Prev Vet Med 85:207-25. 2008
    ..The results suggest that pseudogold standards can help in choosing a correct dependence structure and should be used in combination with latent-class models...
  52. ncbi request reprint A longitudinal study of gastrointestinal parasites in Canadian dairy farms. The value of an indirect Ostertagia ostertagi ELISA as a monitoring tool
    Javier Sanchez
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, PEI, C1A 4P3, Charlottetown, Canada
    Vet Parasitol 107:209-26. 2002
    ..ostertagi crude antigen appears useful as a technique for monitoring gastrointestinal parasite burdens in adult dairy cows and holds promise as a potential predictor of response to anthelmintic treatment...
  53. ncbi request reprint Milk antibodies against Ostertagia ostertagi: relationships with milk IgG and production parameters in lactating dairy cattle
    Javier Sanchez
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada
    Vet Parasitol 120:319-30. 2004
    ..ODR follow the same pattern as the IgG variation across lactation and could be adjusted in order to compare ODR values obtained from high producing cows with those obtained from low producing animals...
  54. doi request reprint Evaluation of milk ELISA for detection of Mycobacterium avium subspecies paratuberculosis in dairy herds and association with within-herd prevalence
    C J Lavers
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3, Canada Electronic address
    J Dairy Sci 97:299-309. 2014
    ..All herds with a milk ELISA prevalence >4% were MAP positive. Although milk ELISA B worked well to establish herd MAP status in high-prevalence herds, interpretation was unreliable in MAP-negative and low-prevalence herds. ..
  55. pmc Ascariasis, respiratory diseases and production indices in selected Prince Edward Island swine herds
    T M Bernardo
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown
    Can J Vet Res 54:267-73. 1990
    ..The percent of hogs per farm with pneumonia ranged from 17% to 96%. The percent of hogs per farm with atrophic rhinitis scores of five ranged from 0% to 57%...
  56. ncbi request reprint Evaluation of the repeatability of a crude adult indirect Ostertagia ostertagi ELISA and methods of expressing test results
    J Sanchez
    Department of Health Management, Atlantic Veterinary College, University of PEI, Charlottetown, PEI, Canada C1A 4P3
    Vet Parasitol 109:75-90. 2002
    ..The analytical methods used to evaluate repeatability provided a practical way to select among normalization procedures...
  57. ncbi request reprint Randomized clinical trial to investigate the effectiveness of teflubenzuron for treating sea lice on Atlantic salmon
    P J Campbell
    Department of Health Management, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
    Dis Aquat Organ 70:101-8. 2006
    ..The use of cage as the unit of concern was an important design component of this trial...
  58. doi request reprint Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens
    K K Reyher
    Canadian Bovine Mastitis Research Network, C P 5000, St Hyacinthe, Quebec, J2S 7C6, Canada
    J Dairy Sci 95:3766-80. 2012
    ..Definitively answering questions of this nature are likely to require an extremely large data set dedicated particularly to minor pathogen presence and NIMI with major pathogens...
  59. pmc Evaluation of the reliability and repeatability of automated milk urea nitrogen testing
    P Arunvipas
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3
    Can J Vet Res 67:60-3. 2003
    ..Reliability and repeatability, as measured by concordance correlation coefficients, were 0.97 and 0.99, respectively...
  60. doi request reprint Evaluation of clustering of new intramammary infections in the bovine udder, including the impact of previous infections, herd prevalence, and somatic cell count on their development
    K K Reyher
    Canadian Bovine Mastitis Research Network, C P 5000, Saint Hyacinthe, Quebec, J2S 7C6, Canada
    J Dairy Sci 96:219-33. 2013
    ..These results of these analyses can be used to inform approaches to preventing NIMI in modern dairy operations...
  61. doi request reprint Examining the effect of intramammary infections with minor mastitis pathogens on the acquisition of new intramammary infections with major mastitis pathogens--a systematic review and meta-analysis
    K K Reyher
    Canadian Bovine Mastitis Research Network, C P 5000, St Hyacinthe, Quebec, J2S 7C6, Canada
    J Dairy Sci 95:6483-502. 2012
    ..Smaller studies (those utilizing fewer than 40 cows) also showed a greater protective effect than larger studies...
  62. ncbi request reprint Influence of feeding ratio and size on susceptibility to microsporidial gill disease caused by Loma salmonae in rainbow trout, Oncorhynchus mykiss (Walbaum)
    J A Becker
    Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
    J Fish Dis 28:173-80. 2005
    ..66 and 0.63, respectively, compared with a small fish. In addition to host species and host strain differences, fish size is now considered a host risk factor for the development of MGD...
  63. ncbi request reprint Assessment of infectious salmon anaemia virus prevalence for different groups of farmed Atlantic salmon, Salmo salar L., in New Brunswick
    C A McClure
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
    J Fish Dis 27:375-83. 2004
    ..However, ISA negative cages (C) that remain on the positive farm may potentially act as a viral reservoir...
  64. ncbi request reprint Description of empirical movement data from Canadian swine herds with an application to a disease spread simulation model
    Jette Christensen
    Canadian Food Inspection Agency, 55 Edinburgh Drive, Charlottetown, PEI C1A 8Z7, Canada
    Prev Vet Med 83:170-85. 2008
    ..Forty-five percent of the simulations did not involve spread beyond the index farm, whereas 34.8% involved spread among five or more farms after 42 days of routine movement...
  65. pmc Factors affecting the use of postincisional analgesics in dogs and cats by Canadian veterinarians in 2001
    Caroline J Hewson
    Sir James Dunn Animal Welfare Centre, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island
    Can Vet J 47:453-9. 2006
    ..The results suggest that continuing education may help to increase analgesic usage. Other important contributors may be client education and a valid method of pain assessment...
  66. ncbi request reprint Efficacy of using an internal teat sealer to prevent new intramammary infections in nonlactating dairy cattle
    Carolyn J Sanford
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE C1A 4P3, Canada
    J Am Vet Med Assoc 228:1565-73. 2006
    ..To determine whether insertion of an internal teat sealer (ITS) at the end of lactation would prevent development of new intramammary infections (IMIs) during the nonlactating period...
  67. ncbi request reprint Spatial analysis of land use impact on ground water nitrate concentrations
    Victoria S Benson
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, C1A 4P3, Canada
    J Environ Qual 35:421-32. 2006
    ....
  68. pmc Estimate of the direct production losses in Canadian dairy herds with subclinical Mycobacterium avium subspecies paratuberculosis infection
    Ashwani Tiwari
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550, University Ave, Charlottetown, Prince Edward Island
    Can Vet J 49:569-76. 2008
    ..Canadian dairy producers should use best management practices to reduce these substantial annual losses...
  69. ncbi request reprint Using and interpreting diagnostic tests
    Shawn L B McKenna
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Canada
    Vet Clin North Am Food Anim Pract 22:195-205. 2006
    ..The most important principle is recognition that the interpretation of test results varies across populations and requires an estimate of the prevalence of the infection (or disease) in the population being studied...
  70. ncbi request reprint Effects of seropositivity for bovine leukemia virus, bovine viral diarrhoea virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum on culling in dairy cattle in four Canadian provinces
    Ashwani Tiwari
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550, University Avenue, Charlottetown, PEI, Canada C1A4P3
    Vet Microbiol 109:147-58. 2005
    ..Results from our research will help in better understanding the economic impacts of these pathogens and justification for their control...
  71. pmc A review of Neospora caninum in dairy and beef cattle--a Canadian perspective
    João Paulo A Haddad
    Health Management Department, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island
    Can Vet J 46:230-43. 2005
    ..By reviewing the scientific literature on N. caninum from a Canadian perspective, culling decisions based on the interpretation of diagnostic tests are more effectively made in the control of N. caninum-associated disease...
  72. ncbi request reprint Assessment of antimicrobial transfer from treated to untreated mammary gland quarters by use of high-pressure liquid chromatography for detection of cloxacillin in milk samples from nonlactating dairy cows
    Carolyn J Sanford
    Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Canada
    Am J Vet Res 67:1140-4. 2006
    ....
  73. pmc Perioperative use of analgesics in dogs and cats by Canadian veterinarians in 2001
    Caroline J Hewson
    Sir James Dunn Animal Welfare Centre, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown
    Can Vet J 47:352-9. 2006
    ..Continuing education (provincial level) and review articles were considered effective ways to inform veterinarians about optimal analgesic practices...
  74. pmc Management factors affecting stereotypies and body condition score in nonracing horses in Prince Edward Island
    Julie L Christie
    Sir James Dunn Animal Welfare Centre, Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island
    Can Vet J 47:136-43. 2006
    ..12) reduced the risk of horses showing oral stereotypies. Some of these results contradict those of other studies perhaps because of populations concerned...
  75. pmc Canadian veterinarians' use of analgesics in cattle, pigs, and horses in 2004 and 2005
    Caroline J Hewson
    Sir James Dunn Animal Welfare Centre, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island
    Can Vet J 48:155-64. 2007
    ..The results indicate an urgent need for veterinarians to manage pain in livestock better. Continuing education would help, as would an increase in the number of approved, cost-effective analgesic drugs with known withdrawal periods...
  76. ncbi request reprint Intra-unit correlations in seroconversion to Actinobacillus pleuropneumoniae and Mycoplasma hyopneumoniae at different levels in Danish multi-site pig production facilities
    Håkan Vigre
    Danish Institute for Food and Veterinary Research, Copenhagen V, Denmark
    Prev Vet Med 63:9-28. 2004
    ..This indicates that the transmission of Mh is more consistent within a farm, whereas the presence of Ap2 varies between batches within a farm...
  77. pmc Factors affecting Canadian veterinarians' use of analgesics when dehorning beef and dairy calves
    Caroline J Hewson
    Sir James Dunn Animal Welfare Centre
    Can Vet J 48:1129-36. 2007
    ..Continuing education of veterinarians should help to increase analgesic usage...
  78. pmc A preliminary equine abuse policy with potential application to veterinary practice
    Julie L Christie
    Sir James Dunn Animal Welfare Centre, Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island
    Can Vet J 46:250-2. 2005
    ..If at least 3 of 5 categories caused concern, a report to the authorities was indicated. The policy was not used but, in the absence of other guidelines, it might assist veterinarians considering potential abuse cases...
  79. pmc Demographics, management, and welfare of nonracing horses in Prince Edward Island
    Julie L Christie
    Sir James Dunn Animal Welfare Centre, Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island
    Can Vet J 45:1004-11. 2004
    ..8%; hoof wall breaks, 32.0%; and white line disease, 8.5%). Many (54.9%) draft horses had docked tails. These results suggest owners might benefit their horses by receiving education in aspects of equine care...