<b>Immune response, blood parameters and growth performance in broiler fed reduced protein diet supplemented with β-hydroxy-β-methyl butyrate and conjugated linoleic acid

This study was undertaken to investigate the growth performance and immune responses of broiler chicks fed diets supplemented with conjugated linoleic acid (CLA). Two hundred and forty day-old Arbor Acre male broiler chicks were randomly allotted into four dietary treatments with different inclusion levels of CLA (0, 2·5, 5·0 or 10·0g pure CLA/kg) for 6 weeks. Growth performance, lysozyme activity, peripheral blood mononuclear cell (PBMC) proliferation, prostaglandin E2 (PGE2) synthesis and antibody production were investigated. There were no significant differences in growth performance among treatments (P>0·05). Chicks fed 10·0g CLA/kg diet produced 40% and 49% more lysozyme activity in serum and spleen than the control group at 21d of age (P<0·05). Dietary CLA enhanced the PBMC proliferation in response to concanavalin A at the age of 21 and 42d (P<0·05). Systemic and peripheral blood lymphocytic synthesis of PGE2 in chicks fed 10·0g CLA/kg diet was significantly decreased by 57% and 42% compared to chicks fed control diet (P<0·05). Antibody production to sheep red blood cell and bovine serum albumin were elevated in either 2·5 or 10·0g CLA/kg dietary treatments (P<0·05). The results indicated dietary CLA could enhance the immune response in broiler chicks, but did not alter the growth performance.

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Probiotic level effects on growth performance, carcass traits, blood parameters, cecal microbiota, and immune response of broilers

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201620150071 ◽

2016 ◽

Vol 88 (2) ◽

pp. 1011-1021 ◽

Cited By ~ 18

Author(s):

MOHAMMADREZA POURAKBARI ◽

ALIREZA SEIDAVI ◽

LEILA ASADPOUR ◽

ANDRÉS MARTÍNEZ

Keyword(s):

Immune Response ◽

Growth Performance ◽

Body Weight Gain ◽

Control Diet ◽

Carcass Traits ◽

Blood Parameters ◽

Feed Conversion ◽

Probiotic Supplementation ◽

Cecal Microbiota ◽

Feed Conversion Rate

Probiotic effects on growth performance, carcass traits, blood parameters, cecal microbiota, and immune response of broilers were studied. Two hundred one-day-old male chickens were allocated to one of five treatments (four replicates of 10 birds per treatment): control, and the same control diet supplemented with 0.005%, 0.01%, 0.015% and 0.02% probiotics. Probiotics in feed at 0.01% or higher levels of supplementation improved body weight gain (+12%) and feed conversion rate (-5%) compared with the control. There were no effects on carcass traits, but the relative weights of drumsticks and wings showed increasing and decreasing linear responses, respectively, to probiotic supplementation level. Blood plasma glucose and albumin contents linearly increased (from 167.1 to 200.5 mg dl-1, and from 1.70 to 3.25 g dl-1) with increasing probiotic supplementation. Triglycerides and cholesterol contents were lower in probiotic supplemented treatments (average contents 71.3 and 125.3 mg dl-1 vs. 92.6 and 149.9 mg dl-1 in the control). Probiotics decreased cecal Escherichia coli counts, but had no effects on immunity related organs or immune response. The linear trends, either positive or negative, observed in many of the parameters studied, suggest that more studies are needed to establish the optimal concentration of probiotics in broiler feed.

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Effect of a Large-sized Cage with a Low Metabolizable Energy and Low Crude Protein Diet on Growth Performance, Feed Cost, and Blood Parameters of Growing Layers

The Journal of Poultry Science ◽

10.2141/jpsa.0190145 ◽

2020 ◽

Author(s):

Yi Wan ◽

Ruiyu Ma ◽

Yan Li ◽

Wei Liu ◽

Junying Li ◽

...

Keyword(s):

Growth Performance ◽

Crude Protein ◽

Blood Parameters ◽

Metabolizable Energy ◽

Protein Diet ◽

Feed Cost

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Polygonatum sibiricum polysaccharide affects growth performance and immune response in cyclophosphamide-induced immunosuppressed chickens

10.21203/rs.2.14956/v1 ◽

2019 ◽

Author(s):

Dan Xu ◽

Jin Zhao ◽

Chonglin Ran ◽

Lu Xu ◽

Shaojun Ren ◽

...

Keyword(s):

Immune Response ◽

Growth Performance ◽

Relative Weight ◽

Blood Parameters ◽

Immunoglobulin M ◽

Antioxidant Ability ◽

Feed Conversion ◽

Immunological Stress ◽

Total Antioxidant ◽

Antibody Titers

Abstract Background: This study aims to identify the effects of dietary Polygonatum sibiricum polysaccharide (PP) on growth performance and blood parameters in immunosuppressed chickens induced by cyclophosphamide (CY). Results: The results showed that PP enhanced the growth performance and immune response in chickens treated with cyclophosphamide characterized by increasing relative weight of thymus, total antioxidant capacity (T-AOC), superoxidase dismutase (SOD), albumin (ALB), immunoglobulin M (IgM), and antibody titers of Newcastle disease (ND) and avian influenza (H9), and decreasing feed conversion ratio (FCR) and malondialdehyde (MDA) level. Conclusions: PP enhanced chickens’ growth performance via improving antioxidant ability and alleviating CY-induced immunological stress.

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