A field trial to evaluate a whole cell vaccine for ...

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Title A field trial to evaluate a whole cell vaccine for the prevention of caseous lymphadenitis in sheep and goat flocks
Author(s) P. I. Menzies, C. A. Muckle, K. A. Brogden, L. Robinson
Journal Canadian Journal of Veterinary Research = Revue Canadienne de Recherche Veterinaire
Date 1991
Volume 55
Issue 4
Start page 362
Abstract A field trial to evaluate a whole cell vaccine for the prevention of caseous lymphadenitis (CLA) in sheep and goats was performed in one goat herd and one sheep flock over a period of three years. In goats, there was a nonstatistically significant trend for fewer cases of CLA in the vaccinated animals compared to the controls. In sheep, from six months to 36 months postinitial vaccination, the proportion of vaccinated sheep that developed CLA was significantly less (p less than 0.05) than in the control sheep. The antibody titers to Corynebacterium pseudotuberculosis as detected by microagglutination assay were significantly different (p less than 0.0001) at all times except at the initial vaccination. Swellings occurred at the vaccination site at an incidence level of 29.6% in goats and 34.1% in sheep. The vaccine appeared to be efficacious in reducing the proportion of sheep that developed CLA when challenged naturally in a field situation.
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