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The efficacy of Salenvac, a Salmonella enterica subsp. Enterica serotype Enteritidis iron-restricted bacterin vaccine, in laying chickens

Woodward, M.J. and Gettinby, G. and Breslin, M.F. and Corkish, J.D. and Houghton, S. (2002) The efficacy of Salenvac, a Salmonella enterica subsp. Enterica serotype Enteritidis iron-restricted bacterin vaccine, in laying chickens. Avian Pathology, 31 (4). pp. 383-392. ISSN 0307-9457

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Abstract

The protective effect of two vaccination regimes using Salenvac, a commercially available iron-restricted Salmonella enterica subsp. Enterica serotype Enteritidis PT4 bacterin vaccine, was verified in laying birds. Immunization was intramuscular at 1 day old and again at 4 weeks of age (V2), or at 1 day and 4 weeks with a third dose at 18 weeks of age (V3). Challenge S . Enteritidis (5 to 7.5) 10 7 colony forming units) was given intravenously at 8, 17, 23, 30 and 59 weeks of age. For all age groups, both vaccination regimes reduced significantly the number of tissues and faecal samples that were culture positive for the challenge strain. For laying birds, fewer eggs ( P < 0.001) were culture positive for S . Enteritidis after challenge from vaccinated laying birds (56/439 batches of eggs) than unvaccinated birds (99/252 batches). The data give compelling evidence that the vaccine is efficacious and may contribute to the reduction of layer infection and egg contamination.

Item type: Article
ID code: 17399
Keywords: oil emulsion bacterin, adjuvant vaccine, typhimurium, infection, hens, eggs, salmonella, chickens, Zoology, Statistics, Animal Science and Zoology, Immunology and Microbiology(all), Food Animals
Subjects: Science > Zoology
Social Sciences > Statistics
Department: Faculty of Science > Mathematics and Statistics
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    Depositing user: Strathprints Administrator
    Date Deposited: 29 Apr 2010 19:15
    Last modified: 05 Sep 2014 01:17
    URI: http://strathprints.strath.ac.uk/id/eprint/17399

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