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Title: Effects of novel probiotic on growth performance and microbial composition of broiler chickens with 'Salmonella sofia' challenge
Contributor(s): Olnood, Chen G (author); Choct, Mingan (author)orcid ; Mikkelsen, Lene Lind (author); Iji, Paul (author)
Publication Date: 2009
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Abstract: The effects of 'L. johnsonii' on gut microflora and bird performance were assessed using 288 day-old Cobb broilers challenged with 'Salmonella sofia' ('S. sofia'). A 3 x 2 factorial design which consisted of three treatments, i.e., a negative control (NC) containing no additives, a positive control (PC) containing antimicrobials (Zinc-bacitracin, 50 ppm; monensin 100ppm) and a probiotic group (Pro) receiving a probiotic via oral gavage; and two factors, i.e., with or without 'S. sofia' challenge. 'L. johnsonii' (10⁹ cfu/chick) was gavaged on days 1, 3, 7 and 12. Chicks were gavaged with 'S. sofia' (10⁷ cfu/chick) on days 2, 8 and 13. Results showed that the challenge itself markedly reduced (P<0.05) bird performance and feed intake, and transient clinical symptoms of the infection with 'S. sofia' were observed from the second time they were challenged with 'S. sofia' in the negative challenge groups. The novel probiotic candidate 'L. johnsonii' reduced the number of 'S. sofia' and 'C. perfringens' in the gut environment, and improved the birds' resistance to 'S. sofia'.
Publication Type: Conference Publication
Conference Name: 20th Annual Australian Poultry Science Symposium, Sydney, Australia, 9th - 11th February, 2009
Conference Details: 20th Annual Australian Poultry Science Symposium, Sydney, Australia, 9th - 11th February, 2009
Source of Publication: Proceedings of the 20th Annual Australian Poultry Science Symposium: Poultry Production in a time of Global Uncertainty, v.20, p. 85-89
Publisher: Poultry Research Foundation, University of Sydney
Place of Publication: Sydney, Australia
ISSN: 1034-6260
Field of Research (FOR): 070204 Animal Nutrition
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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School of Environmental and Rural Science

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