Evaluation of selected direct-fed microbial candidates on live performance and Salmonella reduction in commercial turkey brooding houses.

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Wolfenden RE, Pumford NR, Morgan MJ, Shivaramaiah S, Wolfenden AD, Pixley CM, Green J, Tellez G, Hargis BM

Evaluation of selected direct-fed microbial candidates on live performance and Salmonella reduction in commercial turkey brooding houses.

Poult Sci. 2011 Nov;90(11):2627-31. doi: 10.3382/ps.2011-01360.

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22010250 [ View in PubMed
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Abstract

As effective probiotic Bacillus isolates that can increase BW gain (BWG) are identified, they may offer advantages in terms of stability, cost, and feed application over probiotics limited to drinking water application. Additionally, an effective direct-fed microbial (DFM) may offer an effective alternative to antibiotic growth promoters. Previously, 4 Bacillus isolates were identified and evaluated in our laboratory as potential DFM candidates. These isolates were shown to significantly increase BWG as well as reduce recovery of Salmonella after experimental infection. In the first experiment, isolates PHL-MM65 (a Bacillus laterosporus) and PHL-NP122 (a Bacillus subtilis) were evaluated using poults raised under commercial conditions. After 7 d of conventional brooding, poults were tagged, weighed, and placed in 1 of 4 replicate pens for each treatment group [negative control, 0.019% nitarsone, PHL-MM65 (10(6) spores/g of feed), or PHL-NP122 (10(6) spores/g of feed)] within the commercial turkey barn. At 23 d, poults were weighed and BW was calculated. Treatment with PHL-NP122 (853 g) or nitarsone (852 g) increased BW (P

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