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Control of cattle mange in southern africa using ivermectin

Elimination De La Gale Bovine En Afrique Du Sud Emploi De L'ivermectine

Control de la Sarna Bovina en Africa Del Sur Con Ivermectina

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Summary

Seven trials including 768 cattle were conducted in South Africa and Namibia to evaluate the efficacy of the systemic parasiticide ivermectin when administered subcutaneously at a dose rate of 200 µg/kg against sarcoptic (Sarcoptes scabiei var.bovis), chorioptic (Chorioptes bovis) and psoroptic (Psoroptes ovis var.bovis) mange mites. The efficacy of a single treatment againstPsoroptes andSarcoptes was greater than againstChorioptes. There was marked clinical cure in all treated cases with loss of crusts and hair regrowth. The number of cases of psoroptic mange in two large herds, of which 42.4% of 724 animals were clinically affected prior to mass treatment, was reduced by 99.3% following a single subcutaneous treatment with ivermectin; a single animal from which mites were recovered may not have been treated. The apparent prevalence and prospects for control and eradication of cattle mange in South Africa and Namibia are discussed.

Résumé

Sept essais portant sur 768 têtes ont été menés en Afrique du Sud et en Namibie pour tester l'efficacité de l'Ivermectine, parasiticide systémique, administré à la dose de 200 mg/kg/vif contre les agents des gales sarcoptiques (Sarcoptes scabiei var. bovis) Chorioptique (Chorioptes bovis) et psoroptique (Psoroptes ovis var.bovis).

L'efficacité d'un traitement unique entre les Psoroptes et les Sarcoptes s'est révélee plus grande que contre les Chorioptes. La guérison clinique était bien visible dans tous les cas traités avec disparition des croûtes et repousse du poil.

Le nombre de cas de gale psoroptique dans deux grands troupeaux dont 42,4% des animaux étaient cliniquement atteints avant tout traitement de masse, s'est trouvé réduit de 99,3% après une seule injection sous-cutanée d'Ivermectine. Seul un animal sur lequel des psoroptes ont été retrouvés n'a probablement pas été traité. Les auteurs discutent pour conclure de la prévalence apparente et des perspectives pour maítriser et éliminer la gale du bétail en Afrique du Sud et en Namibie.

Resumen

Se llevaron a cabo siete ensayos, en un número total de 768 bovinos, en Africa del Sur y Namíbia, tendientes a evaluar la eficacia sistémica del parasiticida invermectina, administrado subcutáneamente, en dosis de 200 µg/kg contra sarcoptes (Sarcoptes scabiei var.bovis), corioptes (Chorioptes bovis) y soroptes (Psoroptes ovis var.bovis). La eficacia de un solo tratamiento fue mayor contra soroptes y sarcoptes que contra corioptes. Los animales tratados se curaron definitivamente, desapareciendo las costras y la alopécia. El número de casos de sarna soróptica en dos hatos grandes, en los cuales el 42.4% de 724 animales se encontraba afectado antes del tratamiento masivo, se redujo 99.3%, despues de una dosis sencilla subcutánea de invermectina. Se encontró solamente un animal afectado despues del tratamiento, el cual se crée no fue tratado. Se discute la prevalencia de sarna en sur Africa y Namibia y el posible control y erradicacion de la enfermedad.

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Soll, M.D., Carmichael, I.H., Swan, G.E. et al. Control of cattle mange in southern africa using ivermectin. Trop Anim Health Prod 19, 93–102 (1987). https://doi.org/10.1007/BF02297327

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  • DOI: https://doi.org/10.1007/BF02297327

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