Subclinical ketosis
Description
Citation
| Title | Subclinical ketosis: prevalence and associations with production and disease |
| Author(s) | I. Dohoo, S. Martin |
| Journal | Canadian Journal of Comparative Medicine. Revue Canadienne de Medecine Comparee |
| Date | 1984 |
| Volume | 48 |
| Issue | 1 |
| Start page | 1 |
| Abstract | Cows in 32 southern Ontario Holstein herds were monitored for subclinical ketosis for a period of two and one half years. Milk samples were routinely collected and the level of milk ketone bodies determined by the use of a commercial nitroprusside based test powder (reactions scored as negative, +1 or +2). Approximately 92% of positive reactions were observed in the first 65 days of lactation and for that time period the prevalence of ketosis was 12.1%. Based on this prevalence, the minimum possible duration of subclinical ketosis would be 7.9 days and the minimum possible lactational incidence rate would be 12.1%. The prevalence during the first 65 days of lactation in individual herds ranged from 0 to 33.9%. Subclinical ketosis was more likely to be found in cows experiencing metritis than in unaffected cows. Detection of elevated levels of milk ketones also indicated that the cow had a significantly higher risk of having clinical ketosis, metritis or cystic ovaries diagnosed within the following four days. Milk ketone scores of +1 and +2 were found to be associated with a reduction in daily milk production of 1.0 and 1.4 kg of milk respectively. |
Using APA 6th Edition citation style.
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