Detection model for mastitis in cows milked in an automatic milking system.
Prev Vet Med
; 49(1-2): 71-82, 2001 Apr 13.
Article
em En
| MEDLINE
| ID: mdl-11267690
Automated detection of diseases (such as mastitis) in dairy cows might be an alternative for detection by observation during milking - especially when using an automatic milking system (AMS). An outline of a detection model is given. This detection model includes time-series models for two variables (milk yield and electrical conductivity of milk), with interpolation on previous values. The model is flexible in the number of variables actually used. Parameter values and the residual variances are updated by linear regression after each milking. Alerts for mastitis are given when the residuals fall outside given confidence intervals. A data set with 111 cows for 16 months (on average, 58 lactating cows per day) was used to test the model. Depending on the chosen confidence interval, 42-44 out of 48 cases of clinical mastitis were detected; the remaining cases were not detected because not all data needed were available. These results were better than the results obtained with the model usually used on the farm. The number of false-positive alerts depended on the chosen confidence interval and was higher than the number found with the model usually used.
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Base de dados:
MEDLINE
Assunto principal:
Programas de Rastreamento
/
Modelos Estatísticos
/
Mastite Bovina
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
/
Risk_factors_studies
/
Screening_studies
Limite:
Animals
País/Região como assunto:
Europa
Idioma:
En
Revista:
Prev Vet Med
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Holanda