Survival rate of downer cows treated on farm or in a hospital setting is estimated between 11.3% and 50%. Identifying prognostic indicators could be useful in reducing unnecessary treatments on animals with a poor prognosis.
The primary objective of this study was to predict prognosis associated with downer cows treated at a referral hospital. A secondary objective was to identify prognostic factors associated with the outcome.
This retrospective study included all recumbent dairy cattle older than 15 months that were presented between 1994 and 2016 (n=1472 cases). Information regarding history (age, lactation status, duration of recumbency), hospitalization (outcome, duration, number of days of flotation therapy, diagnosis) and blood analysis results (CBC, biochemistry) were obtained. A multivariable logistic regression model was built to explore the association between hematology and biochemistry parameters and survival.
Overall survival rate was 50.1%. Cows that survived were significantly younger and were recumbent for a shorter period of time. They had lower fibrinogen values and higher neutrophils counts at arrival than cows that did not survive. Finally, cows that survived had significantly lower values of AST, CK, BUN, creatinine, and phosphorus and higher total CO2 value at arrival than cows that did not survive. An increase in fibrinogen, AST, and creatinine values were significantly associated with lower odds of survival.
We concluded that the overall survival rate of downer cows treated in-hospital with flotation therapy is approximatively 50%. Further, some historical elements, CBC and biochemistry values can be used to select cases with a better chance of survival.
Université de Montréal - Faculté de médecine vétérinaire
Friday, June 15
1:30 PM – 1:45 PM
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