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Year : 1993
Tome : 144
Volume : 5
Pages : 425-429
Title : Liver fluke therapy by Closantel in culled dairy cows
Authors : C. MAGE, D. LEVIEUX, P. BERNABE, P. DEGEZ
Summary : The effect of a flukicide treatment was evaluated on culled cows. The trial was performed on 60 Montbeliardes cows of different origins and which were grouped for intensive fattening. Animals were allocated on the basis of live weight and infection level. The infection level was evaluated by means of serological examination at the beginning of the fattening period (D 0). The cows were divided into two groups : a Control Group, of 28 untreated animals, and a Treated Group of 32 cows which received closantel at the dose level of 5 mg/kg L.W. subcutaneously. The treatment was given on the 4th day after the beginning of the trial (D 4). At the end of the fattening period, the animals were weighed and serological examinations were performed. After slaughter, (D 74-85) a liver fluke count was performed and the carcass classification was recorded. The flukicide treatment did not negatively influence the weight gain of the cows, nor did it affect the carcass yield. However, a better carcass classification of the Treated Group due to the treatment, resulted in a financial benefit of 74 French Francs per animal, under the conditions of the trial. When comparing the total number of flukes in the livers of the Control and Treated Groups, the anthelmintic efficacy of closantel was calculated to be 95 %. The treatment resulted in a nearly 80 % decrease of the level of antibodies (p < 0,05).
Keywords : Fasciola hepatica - closantel - financial benefit - dairy cattle.
Correspondence : C. MAGE
Adress : Institut de l'levage, 7, rue Martial Pradet, F-87100 Limoges

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