Completeness of the disease recording systems for dairy cows in Denmark, Finland, Norway and Sweden with special reference to clinical mastitis

BMC Veterinary Research

Ulf Emanuelson³  Ann Lindberg⁴  Agneta Egenvall³  Simo Rintakoski⁵  Ann-Kristina Lind²  Mari Espetvedt¹  Cecilia Wolff³ 

[1] Department of Production Animal Clinical Science, Norwegian School of Veterinary Science, P.O. Box 8146 Dep, NO-0033, Oslo, Norway;Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870, Frederiksberg, Denmark;Department of Clinical Sciences, Swedish University of Agricultural Sciences, P.O. Box 7054, SE-750 07, Uppsala, Sweden;National Veterinary Institute, SE-751 89, Uppsala, Sweden;Department of Veterinary Biosciences, University of Helsinki, P.O. Box 66, FI-00014, Helsinki, Finland

关键词: Validation;    Database;    Nordic;    Completeness;    Disease recording;    Bovine mastitis;   

Others  :  1119756
DOI  :  10.1186/1746-6148-8-131

 received in 2011-10-10, accepted in 2012-07-04,  发布年份 2012

【 摘 要 】

Background

In the Nordic countries Denmark, Finland, Norway and Sweden, the majority of dairy herds are covered by disease recording systems, in general based on veterinary registration of diagnoses and treatments. Disease data are submitted to the national cattle databases where they are combined with, e.g., production data at cow level, and used for breeding programmes, advisory work and herd health management. Previous studies have raised questions about the quality of the disease data. The main aim of this study was to examine the country-specific completeness of the disease data, regarding clinical mastitis (CM) diagnosis, in each of the national cattle databases. A second aim was to estimate country-specific CM incidence rates (IRs).

Results

Over 4 months in 2008, farmers in the four Nordic countries recorded clinical diseases in their dairy cows. Their registrations were matched to registrations in the central cattle databases. The country-specific completeness of disease registrations was calculated as the proportion of farmer-recorded cases that could be found in the central database. The completeness (95% confidence interval) for veterinary-supervised cases of CM was 0.94 (0.92, 0.97), 0.56 (0.48, 0.64), 0.82 (0.75, 0.90) and 0.78 (0.70, 0.85) in Denmark, Finland, Norway and Sweden, respectively. The completeness of registration of all CM cases, which includes all cases noted by farmers, regardless of whether the cows were seen or treated by a veterinarian or not, was 0.90 (0.87, 0.93), 0.51 (0.43, 0.59), 0.75 (0.67, 0.83) and 0.67 (0.60, 0.75), respectively, in the same countries. The IRs, estimated by Poisson regression in cases per 100 cow-years, based on the farmers’ recordings, were 46.9 (41.7, 52.7), 38.6 (34.2, 43.5), 31.3 (27.2, 35.9) and 26.2 (23.2, 26.9), respectively, which was between 20% (DK) and 100% (FI) higher than the IRs based on recordings in the central cattle databases.

Conclusions

The completeness for veterinary-supervised cases of CM was considerably less than 100% in all four Nordic countries and differed between countries. Hence, the number of CM cases in dairy cows is underestimated. This has an impact on all areas where the disease data are used.

【 授权许可】

   
2012 Wolff et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1 .

Figure 2 .

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