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Effects of coccidial vaccination and dietary antimicrobial alternatives on the growth performance, internal organ development, and intestinal morphology of Eimeria-challenged male broilers.
- Source :
-
Poultry science [Poult Sci] 2019 May 01; Vol. 98 (5), pp. 2054-2065. - Publication Year :
- 2019
-
Abstract
- Effects of the coccidial vaccination and dietary antimicrobial alternatives on growth performance, internal organ development, and intestinal morphology of male broilers subjected to an Eimeria challenge were determined. A total of 1,120 one d-old Ross × Ross 708 male broilers were randomly distributed to 80 floor pens (10 treatments, 8 replication pens/treatment, and 14 chicks/pen). A 2 × 5 factorial arrangement of treatments was used to determine the main and interaction effects of the coccidial vaccination (vaccinated or non-vaccinated) and the dietary additive [1) corn and soybean-meal basal diet, 2) basal diet + antimicrobials (bacitracin and salinomycin), 3) basal diet + probiotics (3 Bacillus subtilis strains), 4) basal diet + prebiotics (mannan-oligosaccharides and β-glucans), and 5) basal diet + probiotics + prebiotics]. To mimic the Eimeria challenge, all chicks were gavaged with a 20x dose of a different coccidial vaccine (live Eimeria oocysts) at Day 14. The coccidial vaccination decreased Day 0-14 and 29-42 BW gain (BWG) and subsequently decreased Day 0-56 BWG. Broilers fed diets with antimicrobials exhibited the lowest feed conversion ratio (FCR) during the periods of Day 0-14 and 15-28, the shallowest ileal crypt depth on Day 28, and the lowest relative duodenum weight on Day 28 and 42. The Pre+Pro diets helped the broilers to reach a lower overall FCR than did the Pro alone diets and helped the broilers reach a FCR similar to that of the Anti diets. However, broilers fed diets supplemented with prebiotics and probiotics exhibited the deepest intestinal crypt depth on Day 28. There was no interaction between coccidial vaccination and dietary additive on growth performance or any carcass yield. In conclusion, antimicrobial additives might reduce the intestinal size of broilers; whereas prebiotic and B. subtilis-based probiotic additives might promote the growth of several digestive organs. Prebiotics can be safely used with B. subtilis-probiotics in broiler feed without compromising feed conversion ability.<br /> (© 2018 Poultry Science Association Inc.)
- Subjects :
- Animal Feed analysis
Animals
Anti-Infective Agents administration & dosage
Bacillus subtilis chemistry
Coccidiosis parasitology
Coccidiosis prevention & control
Diet veterinary
Intestines drug effects
Male
Poultry Diseases parasitology
Prebiotics administration & dosage
Prebiotics analysis
Probiotics administration & dosage
Probiotics analysis
Probiotics pharmacology
Random Allocation
Vaccination methods
Anti-Infective Agents pharmacology
Chickens growth & development
Chickens physiology
Coccidiosis veterinary
Dietary Supplements analysis
Intestines physiology
Poultry Diseases prevention & control
Vaccination veterinary
Subjects
Details
- Language :
- English
- ISSN :
- 1525-3171
- Volume :
- 98
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Poultry science
- Publication Type :
- Academic Journal
- Accession number :
- 30590754
- Full Text :
- https://doi.org/10.3382/ps/pey552