Document Detail

Effects of feeding polyclonal antibody preparations on ruminal bacterial populations and ruminal pH of steers fed high-grain diets.
MedLine Citation:
PMID:  16864880     Owner:  NLM     Status:  MEDLINE    
Three experiments with factorial arrangements of treatments were designed to test the efficacy of avian-derived polyclonal antibody preparations (PAP) against Streptococcus bovis (PAP-Sb) or Fusobacterium necrophorum (PAP-Fn) in reducing ruminal counts of target bacteria in beef steers supplemented or not with feed additives (300 mg of monensin/d and 90 mg of tylosin/d; MT). Feeding increasing doses of PAP-Sb in Exp. 1 or a single dose in Exp. 2 reduced S. bovis counts in a cubic fashion (P = 0.014). In Exp. 1 and 2, inclusion of MT in the diet had no effect (P > 0.05) on ruminal S. bovis counts. In Exp. 2, ruminal pH was increased (P < 0.05) by feeding PAP-Sb, MT, and PAP-Sb plus MT. Ruminal F. necrophorum counts were reduced by feeding PAP-Fn (P = 0.002) and MT (P < 0.001). Reduction in ruminal F. necrophorum counts was greater (P = 0.008) when feeding MT alone than when feeding PAP-Fn and MT together. In Exp. 3, ruminal S. bovis counts were not affected (P = 0.64) by PAP-Fn. Ruminal pH was not affected (P = 0.61) by feeding PAP-Fn, and the total anaerobic bacterial count was not affected (P > 0.05) by either PAP-Sb or PAP-Fn in Exp. 1 or Exp. 3. In conclusion, PAP of avian origin and against S. bovis or F. necrophorum were effective in reducing target ruminal bacterial populations. These PAP could be effective in preventing the deleterious effects associated with these bacteria, and possibly in enhancing animal performance.
N DiLorenzo; F Diez-Gonzalez; A DiCostanzo
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Journal of animal science     Volume:  84     ISSN:  1525-3163     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-07-25     Completed Date:  2006-10-19     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2178-85     Citation Subset:  IM    
Department of Animal Science, University of Minnesota, St. Paul 55108, USA.
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MeSH Terms
Animal Feed
Animal Nutritional Physiological Phenomena
Anti-Bacterial Agents / pharmacology
Antibodies, Bacterial / administration & dosage*,  immunology*
Cattle / immunology*,  microbiology*
Diet / veterinary*
Fusobacterium necrophorum / drug effects,  immunology
Hydrogen-Ion Concentration
Ionophores / pharmacology
Monensin / pharmacology
Rumen / drug effects*,  immunology,  microbiology*
Streptococcus bovis / drug effects,  immunology
Tylosin / pharmacology
Reg. No./Substance:
0/Anti-Bacterial Agents; 0/Antibodies, Bacterial; 0/Ionophores; 1401-69-0/Tylosin; 17090-79-8/Monensin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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