Document Detail


Optimal replacement of mastitic cows determined by a hierarchic Markov process.
MedLine Citation:
PMID:  7836585     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Farmers frequently have to decide whether to keep or to replace cows that suffer from clinical mastitis. A dynamic programming model was developed to optimize these decisions for individual cows within the herd, using the hierarchic Markov process technique. This technique provides a method to model a wide variety of cows, differing in age, productive performance, reproductive status, and clinical mastitis occurrence. The model presented was able to support decisions related to 63% of all replacements. Results--for Dutch conditions--showed the considerable impact of mastitis on expected income of affected cows. Nevertheless, in most cases, the optimal decision was to keep and to treat rather than to replace the cow. Clinical mastitis occurring in the previous lactation negligibly influence expected income. Clinical mastitis in current lactation, especially in the current month, however, had a significant effect on expected income. Total losses caused by clinical mastitis were US$83/yr per cow. Farm level treatment, which reduced incidence by 25%, on a farm with 10 clinical quarter cases per 10,000 cow days, may cost at maximum US$27/yr per cow.
Authors:
E H Houben; R B Huirne; A A Dijkhuizen; A R Kristensen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  77     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1994 Oct 
Date Detail:
Created Date:  1995-03-01     Completed Date:  1995-03-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2975-93     Citation Subset:  IM    
Affiliation:
Department of Farm Management, Wageningen Agricultural University, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle
Dairying / economics*
Female
Lactation
Markov Chains
Mastitis, Bovine / economics*,  physiopathology
Models, Economic*
Netherlands

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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