Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/43226

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Title
Selection of a novel direct-fed microbial to enhance weight gain in intensively reared calves
Author/Creator
Adams, M. C.;  Luo, J.;  Rayward, D.;  King, S.;  Gibson, R.;  Moghaddam, G. H.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Environmental and Life Sciences
Description
A novel bacterial strain isolated in Australia, Propionibacterium jensenii 702 (PJ702), was examined for its potential as a direct-fed microbial to improve weight gain in calves. Holstein bull calves, 24, were randomly allocated into a Treatment or Control group and held under simulated commercial calf rearing conditions. Both groups were treated identically, with the exception that the Treatment calves were given between 1.1×10⁸ and 1.2×10⁹ cfu/(kg day) of PJ702. Faecal recovery of PJ702 from the Treatment calves from week 2 indicated successful gastrointestinal transit of the bacterium, and blood haematology and biochemistry indicated no adverse effects following PJ702 administration. There were improvements in weight gains with the Treatment group during both the pre-weaning (P=0.001) and the weaning period (P=0.04). Eighteen weeks after cessation of treatment, and removal to an extensive farming operation, Treatment calves remained heavier to the Control calves (P=0.03), with a final weight difference between the groups of 21.3 kg.
Relation
Animal Feed Science and Technology Vol. 145, Issue 1-4, p. 41-52
Publisher Link
http://dx.doi.org/10.1016/j.anifeedsci.2007.05.035
Date
2008
Publisher
Elsevier
Keyword(s)
direct-fed microbial;  weight gain;  calves;  Propionibacterium
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/43226
Identifier
ISSN:0377-8401
Reviewed
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Subject
"Animal Feed Science and Technology"
 
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