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Control of ovine brucellosis in najdi sheep in saudi Arabia

Lutte Conter La Brucellose Ovine Chez Des Moutons Najdi En Arabie Saoudite

Control De Brucelosis Ovina En Ovejas Najdi En Arabia Saudita

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Summary

A practical programme for control of ovine brucellosis in a Najdi sheep flock at Haradh and protection of sheep handlers from infection was implemented. Haradh sheep were serologically tested three times at six-month intervals. Of 2,721 sheep subjected to the first test, 387 (14.2%) were positive reactors. At the second test 2,072 sheep were tested and 31 (1.5%) were positive. The third test was performed on 2,963 sheep and only nine (0.3%) positive reactors were found. Of eight sheep handlers six had Malta fever. Positive reactor sheep were slaughtered and buried after each test. Following the third test all negative sheep were vaccinated with inactivatedBrucella melitensis vaccine. Infected sheep handlers were treated at the Haradh clinic. One year after completion of the programme abortions and infertility problems had disappeared and the lambing percentage had increased from 0.8 to 1.3 lambs per ewe. In addition all young lambs born to vaccinated ewes were found to be serologically negative. We suggest expansion of the present programme into a national brucellosis control campaign in the kingdom.

Résumé

Un programme pratique de lutte contre la brucellose ovine dans un troupeau de moutons Najdi à Haradh et de protection des éleveurs contre l'infection a été mis en oeuvre. Les moutons de Haradh ont été testés sérologiquement trois fois à six mois d'intervalle. Sur 2 721 moutons soumis au premier test, 387 (14,2 p. 100) ont réagi positivement; sur 2 072 moutons, au second test, 31 (1,5 p. 100); et sur 2 963 moutons, au troisième test, seulement 0,3 p. 100. Sur huit éleveurs de moutons, six étaient atteints de fièvre de Malte. Les moutons ayant réagi positivement ont été abattus et enterrés après chaque test. Après le troisième test, tous les animaux négatifs ont été vaccinés avec un vaccin àBrucella melitensis inactivé. Les éleveurs ont été soignés la clinique de Haradh. Un an après la fin du programme, les avortements et les problèmes d'infertilité avaient disparu et le pourcentage d'agnelages avait augmenté de 0,8 à 1,3 agneau par brebis. De plus, tous les jeunes agneaux nés de mères vaccinées étaient sérologiquement négatifs. L'extension de ce programme en une campagne de lutte nationale est préconisée.

Resumen

Se implementó un programa práctico, para el control de brucelosis ovina en ovejas Najdi en Haradh, y para proteger a los pastores. Las ovejas se analizaron serológicamente tres veces con intervalos de seis meses. De 2.721 ovejas analizadas la primera vez, 387 (14.2%) dieron resultados positivos. La segunda vez, se analizaron los sueros de 2.072 ovejas, de las cuales 31 (1.5%) fueron positivas. El tercer analisis se realizo en 2.963 ovejas de la cuales solo nueve (0.3%) se detectaron como reactores positivos. De ocho pastores, seis tenían fiebre de Malta. Las ovejas positivas fueron eliminadas después de cada prueba serológica. Seguidamente, después de la tercera prueba, todas las ovejas negativas se vacunaron con la vacuna inactivada deBrucella melitensis. Los pastores enfermos, fueron hospitalizados. Un año después de la campaña, los problemas de aborto e infertilidad habían desaparecido, y el porcentaje de nacimientos se incrementó de 0.8 a 1.3 corderos por oveja. Más aún, todos los corderos nacidos de madres vacunadas fueron negativos serológicamente. Nosotros sugerimos la expansión del presente programa de control de brucelosis, a todo el Reino.

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Radwan, A.I., Bekairi, S.I., Al-Mukayel, A.A. et al. Control of ovine brucellosis in najdi sheep in saudi Arabia. Trop Anim Health Prod 16, 213–218 (1984). https://doi.org/10.1007/BF02265324

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  • DOI: https://doi.org/10.1007/BF02265324

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