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Martins PC, Santos JS, Rezende PM, Royer AFB, Montel LM, Carvalho FB, Andrade MA, Araújo ICS, Stringhini JH. Cellular and humoral immunity of broilers subjected to posthatch fasting and a prestarter diet containing conjugated linoleic acid. Poult Sci 2023; 102:103167. [PMID: 37926012 PMCID: PMC10632964 DOI: 10.1016/j.psj.2023.103167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 11/07/2023] Open
Abstract
This study aimed to evaluate the immunity of chickens up to 35 d subjected to posthatch fasting and supplementation with conjugated linoleic acid (CLA). A total of 320 chicks were housed in a completely randomized design with a 2 × 2 factorial arrangement (0 or 12 h of fasting × 0.000 or 0.025% CLA in a prestarter diet), totaling 4 treatments (No-F-12 h; F-12 h; No-CLA; CLA) with 8 replicates of 10 birds each. The relative weights (% body weight) of the spleen and bursa were determined 12 h posthatch (Post-12 h) and then weekly. Immunoglobulin Y (IgY) titers against Newcastle disease virus (NDV) were measured by ELISA in the yolk sac contents Post-12 h and in the serum weekly. Hypersensitivity to phytohemagglutinin (PHA) inoculation was evaluated by toe-web swelling response on d 13 and 34, 4 times a day (after 3 h, 6 h, 12 h, and 24 h inoculation, respectively, PHA-3 h, PHA-6 h, PHA-12 h, and PHA-24 h). The data were subjected to analysis of variance (P < 0.05). F-12h reduced the Post-12 h relative weight of the spleen, and CLA reduced the relative weight of the bursa at this stage and at 28 d. At 13 d, F-12 h reduced PHA-3 h, whereas PHA-12 h was increased by CLA. At 34 d, CLA reduced PHA-3 h. A greater reaction was observed in the No-F-12 h-CLA chicks, for the PHA-24 h. In the Post-12 h evaluation, F-12h reduced, whereas CLA increased NDV-specific IgY titers in the yolk sac. No-F-12 h-No-CLA chicks had the lowest serum titers. At 21 d, F-12 h-CLA chicks exhibited the highest serum titers. Titers were higher in the F-12 h-No-CLA chicks, when compared to other treatments. At 28 d, fasting reduced the titers. In conclusion, F-12 h and CLA accelerated the transfer of immunoglobulins from the yolk sac to the serum. F-12 h impairs cellular immunity, whereas CLA favors it.
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Affiliation(s)
- Poliana C Martins
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Januária S Santos
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Pedro M Rezende
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Ana F B Royer
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Lais M Montel
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Fabyola B Carvalho
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Maria A Andrade
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Itallo C S Araújo
- Department of Animal Science, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - José H Stringhini
- Department of Animal Science, Veterinary School, Federal University of Goiás, Goiânia, Goiás, Brazil.
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Abstract
Soybean is one of the main sources of foreign exchange credits for Brazil in the agricultural sector. There is increasing interest in growing this leguminous crop, especially in the southern region of Minas Gerais, due to its importance as an alternative for crop rotation with maize. In this respect, the study of the adaptability of new cultivars to the region is indispensable so as to obtain high yields. Thus, the aim of this study was to evaluate the performance of 38 soybean cultivars for growing in the summer season in the municipality of Lavras, MG, Brazil, in the 2010/2011 and 2011/2012 crop years. The experiments were conducted in a randomized block design with 3 replications and the treatments consisted of 38 cultivars. At the time of harvest, the following assessments were made: grain yield (kg/ha), height of the lowest pod (cm), plant height (cm), and lodging. The data were subjected to individual and combined analysis of variance. The phenotypic mean values were clustered, adopting the Scott and Knott test. For simultaneous selection of multiple traits, the sum of rank index of Mulamba and Mock was adopted. The cultivar TMG 801 RR had the best yield performance; the cultivars Monsoy 8001, MGBR-46 (Conquista), and BRSMG 68 (Vencedora) also stood out. Considering simultaneous selection for grain yield, plant height, height of the lowest pod, and lodging, the cultivar TMG 801 RR is recommended for growing in the summer season in the southern region of Minas Gerais.
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Affiliation(s)
- I O Soares
- Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
| | - P M Rezende
- Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
| | - A T Bruzi
- Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
| | - E V Zambiazzi
- Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
| | - A M Zuffo
- Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
| | - K B Silva
- Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
| | - R Gwinner
- Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
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Arantes UM, Stringhini JH, Oliveira MC, Martins PC, Rezende PM, Andrade MA, Leandro NSM, Café MB. Effect of different electrolyte balances in broiler diets. Rev Bras Cienc Avic 2013. [DOI: 10.1590/s1516-635x2013000300010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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