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Ketosis Treatment and Milk Yield in Dairy Cows Related to Milk Acetoacetate Levels
Ketosebehandlinger og mjølkeytelse hos storfe i relasjon til nivået av acetoacetat i mjølk
Acta Veterinaria Scandinavica volume 31, pages 433–440 (1990)
Abstract
Milk yield and milk acetoacetate (M-acac) were measured weekly for the first 6 weeks of lactation in 5 herds with a ketosis problem. Ketosis treatments and the corresponding ketotest score, were also recorded.
The treatment rate was highest 7–16 days after calving. Most of these early cases were associated with low ketone levels in milk, whereas the treatment ratefor cows with high ketone levels was highest 17–31 days after calving. Nearly half of the treated cows were low-ketone animals. They were classified as ketosis cases in the cow health card records, although probably suffering from other post partum disturbances in many instances. About 40 % of the cows with high ketone levels recovered spontaneously. Reduction in milk yield associated with peak M-acac levels was transient and moderate.
It was concluded that health card statistics overestimates the severity of the ketosis problem in Norway.
Sammendrag
Mjølkeytelse og mjølkas innhold av acetoacetat ble målt ukentlig de første ukene av laktasjonen i 5 besetninger med ketoseproblemer. Ketosebehandlinger og resultatet av ketotesten på mjølk ved behandling ble også registrert.
Behandlingsraten var høyest 7–16 dager etter kalving. Ved mange av disse tilfellene var innholdet av ketonlegmer i mjølka lavt. Behandlingsraten for kyr med høye ketonnivåer var høyest 17–31 dager ettter kalving. For hele materialet var nesten halvparten av de behandlede kyrne i lav-ketongruppen. De ble registrert som ketosetilfeller i helsekortene, mens mange av disse tilfellene sannsynligvis var knyttet til andre sjukdomstilstander. Ca. 40 % av kyrne med høye ketonnivåer restituerte spontant. Mjølketapet i forbindelse med de høye acetoacetatnivåene var forbigående og moderat.
Det konkluderes med at helsekortstatistikken overestimerer ketose som et sjukdomsproblem i Norge.
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Simensen, E., Halse, K., Gillund, P. et al. Ketosis Treatment and Milk Yield in Dairy Cows Related to Milk Acetoacetate Levels. Acta Vet Scand 31, 433–440 (1990). https://doi.org/10.1186/BF03547525
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DOI: https://doi.org/10.1186/BF03547525