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Research Journal of Veterinary Sciences

Year: 2009 | Volume: 2 | Issue: 1 | Page No.: 10-13
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Authors

O.M. Mahmoud

E.M. Haroun

O.H. Omer

Keywords

Research Article

The Effect of Zinc Injection on the Duration of Protection Against Abscess Diseases in Vaccinated Ewes

O.M. Mahmoud, E.M. Haroun and O.H. Omer
The effect of zinc injection on the duration of protection against abscess disease was studied on ewes vaccinated against the disease. Thirty two Najdi ewes, 1 to 2 years of age, were divided into 4 groups of 8 animals each. Group 1 ewes were injected subcutaneously with zinc, as zinc oxide suspended in olive oil, at a dose rate of 5 mg kg-1 body weight. Group 2 ewes were concurrently injected with 5 mg kg-1 zinc and vaccinated against abscess disease. Group 3 ewes were injected with the vaccine only. Group 4 ewes were left as untreated controls. A booster dose of the zinc and/or vaccine was given to ewes of groups 1, 2 and 3 fifteen days after the initial dose. Eight rams infected with abscess disease were used as a source of natural infection and were mixed with the experimental animals in one pen after the injection of the booster dose. Loss of protection of zinc and/or vaccine against the disease is considered when an abscess appeared in one animal of the group. Abscesses appeared in the 16th week post introduction of infected rams in group 1 ewes. Group 2 ewes developed abscesses in the 37th week after introduction of infected rams. The abscesses developed in this group were of smaller size compared to those seen in the other groups. Group 3 ewes developed abscesses in the 19th week after subjection to the natural infection. Group 4 ewes developed abscesses in the 4th week after introduction of infected rams. Concurrent injection of zinc and vaccination gave the longest protection against abscess disease.
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How to cite this article

O.M. Mahmoud, E.M. Haroun and O.H. Omer, 2009. The Effect of Zinc Injection on the Duration of Protection Against Abscess Diseases in Vaccinated Ewes. Research Journal of Veterinary Sciences, 2: 10-13.

URL: https://scialert.net/abstract/?doi=rjvs.2009.10.13

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