Document Detail


Influence of housing system, grain type, and particle size on Salmonella colonization and shedding of broilers fed triticale or corn-soybean meal diets.
MedLine Citation:
PMID:  18281566     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Salmonella colonization in poultry may be influenced by grain type and particle size. Broilers reared either in nonlitter cage-based housing or in a conventionally floored litter house from 0 to 42 d were assigned to 1 of 4 dietary treatments: 1) ground corn-soybean meal (C, 560 microm), 2) coarsely ground corn-soybean meal (CC, >1,700 microm), 3) ground triticale-soybean meal (T, 560 microm), or 4) whole triticale-soybean meal (WT). A 4-strain cocktail of Salmonella enterica was orally gavaged into each chick at placement. Growth performance, cecal and fecal Salmonella populations, gizzard and proventriculus pH, intestinal size, jejunum histomorphometry, and carcass yields were measured. Broilers responded differently to the dietary treatments according to the housing system used. At 42 d, birds reared on litter and fed ground grain had greater BW than those fed coarse grain (2.87 vs. 2.71 kg), whereas cage-reared broilers fed ground triticale were heavier than those fed corn (2.75 vs. 2.64 kg). Broilers raised on litter had a better feed conversion ratio than those raised in cages (1.71 vs. 1.81 g/g). Independent of the housing system, relative eviscerated carcass weights of birds fed T and C were heavier than those of CC- and WT-fed broilers (762 vs. 752 g/kg). Generally, the jejunum villus area and mucosal depth were larger, whereas the small intestine was lighter and shorter in broilers raised on litter. Relative gizzard weights of broilers raised on litter and fed the coarser diets were heavier than those of broilers reared in cages and fed finely ground diets. Feeding whole or coarsely ground grains decreased cecal Salmonella populations in 42-d-old broilers (3.8, 3.9, 4.4, and 4.4 log most probable number/g for CC, WT, C, and T, respectively). Additionally, 42-d-old broilers reared on litter had lower cecal Salmonella populations than those in cages (3.8 vs. 4.4 log most probable number/g). In conclusion, as a feed ingredient, triticale is a good alternative to corn, resulting in improved BW and reduced Salmonella colonization. Broilers raised on litter may have achieved lower cecal Salmonella populations than caged birds because access to litter may have modulated the intestinal microflora by increasing competitive exclusion microorganisms, which discouraged Salmonella colonization.
Authors:
F B O Santos; B W Sheldon; A A Santos; P R Ferket
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Poultry science     Volume:  87     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-02-18     Completed Date:  2008-04-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  405-20     Citation Subset:  IM    
Affiliation:
Department of Poultry Science, North Carolina State University, Raleigh 27695-7608, USA.
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MeSH Terms
Descriptor/Qualifier:
Animal Feed / analysis*,  standards
Animal Nutritional Physiological Phenomena / physiology
Animals
Cereals
Chickens / growth & development*
Colony Count, Microbial / veterinary
Eating / physiology
Gastrointestinal Tract / microbiology
Gizzard / microbiology
Housing, Animal*
Hydrogen-Ion Concentration
Organ Size
Particle Size
Poultry Diseases / epidemiology,  microbiology*
Random Allocation
Salmonella Infections, Animal / epidemiology,  microbiology*
Salmonella enterica / growth & development*
Soybeans
Weight Gain
Zea mays

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


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