Effect of antibiotics and low-crude protein diets on growth performance, health, immune response, and fecal microbiota of growing pigs

Abstract This study aimed to investigate the effects of diets with and without antibiotics supplementation and diets with 18.5% and 13.0% crude protein (CP) on growth performance, carcass characteristics, disease incidence, fecal microbiota, immune response, and antioxidant capacity of growing pigs....

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Bibliographic Details
Published in:Journal of animal science 2023-01, Vol.101
Main Authors: Gomes, Maykelly da S, Duarte, Marcos E, Saraiva, Alysson, de Oliveira, Leandro L, Teixeira, Lucas M, Rocha, Gabriel C
Format: Article
Language:English
Subjects:
Abundance
Animal Feed - analysis
Animals
Anti-Bacterial Agents - pharmacology
Antibiotics
Carbonyl compounds
Carbonyls
Carcasses
Defence mechanisms
Diarrhea
Diarrhea - prevention & control
Diarrhea - veterinary
Diet
Diet - veterinary
Diet, Protein-Restricted - veterinary
Dietary Supplements
Fecal microflora
Feces
Growth
Hogs
IgG antibody
Immune response
Immune response (humoral)
Immune system
Immunity
Immunoglobulin G
Low protein diet
Microbiota
Microorganisms
Nutrient deficiency
Oxytetracycline
Proteins
Relative abundance
Residual effects
Swine
Tiamulin
Weight Gain
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Summary:Abstract This study aimed to investigate the effects of diets with and without antibiotics supplementation and diets with 18.5% and 13.0% crude protein (CP) on growth performance, carcass characteristics, disease incidence, fecal microbiota, immune response, and antioxidant capacity of growing pigs. One hundred and eighty pigs (59-day-old; 18.5 ± 2.5 kg) were distributed in a randomized complete block design in a 2 × 2 factorial arrangement, nine replicates, and five pigs per pen. The factors were CP (18.5% or 13.0%) and antibiotics (none or 100 mg/kg tiamulin + 506 mg/kg oxytetracycline). Medicated diets were fed from days 59 to 73. After that, all pigs were fed their respective CP diets from 73 to 87 days. Data were analyzed using the Mixed procedure in SAS version 9.4. From days 59 to 73, pigs fed antibiotics diets had higher (P 
ISSN:0021-8812
1525-3163
DOI:10.1093/jas/skad357