Control of Salmonella typhimurium Colonization in Broiler Chicks with a Continuous-Flow Characterized Mixed Culture of Cecal Bacteria
Autor: | Donald E. Corrier, Charles M. Scanlan, A. G. Hollister, J. R. Deloach, D. J. Nisbet |
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Rok vydání: | 1995 |
Předmět: |
Male
Salmonella typhimurium Salmonella animal structures medicine.disease_cause digestive system Microbiology Bacteria Anaerobic Animal science Mixed culture medicine Animals Colonization Cecum Poultry Diseases chemistry.chemical_classification Salmonella Infections Animal biology Continuous flow Broiler Fatty acid General Medicine biology.organism_classification chemistry embryonic structures Animal Science and Zoology Chickens Bacteria After treatment |
Zdroj: | Poultry Science. 74:916-924 |
ISSN: | 0032-5791 |
DOI: | 10.3382/ps.0740916 |
Popis: | A continuous-flow culture system was used to isolate and maintain a mixed culture of cecal bacteria from adult broilers composed of 29 bacterial strains representing 10 genera. Broiler chicks were treated with the mixed culture in the drinking water on the day of hatch and challenged orally with 10(4) Salmonella typhimurium 2 d after treatment. The experiment was repeated in four separate trials using newly hatched chicks. The concentration of propionic acid and total volatile fatty acid (VFA) in the cecal contents was determined 2 d after treatment and at 10 d of age. Compared with controls, the number of treated chicks that were cecal culture-positive for Salmonella decreased (P < .01) in each of the trials. Additionally, the number of Salmonella in the cecal contents of the treated chicks at 10 d of age was decreased (P < .005) compared with controls in each trial. The decreased number of Salmonella in the cecal contents of the 10-d-old treated chicks was correlated with elevated concentrations of propionic acid (P < .05) and total VFA (P < .1) in the cecal contents of the treated chicks 2 d after treatment. The results indicated that VFA-producing bacteria present in the mixed culture became rapidly established in the ceca of the treated chicks and effectively increased resistance to S. typhimurium challenge. |
Databáze: | OpenAIRE |
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