Histomorfometria De Orgãos Linfoides E Desenvolvimento Intestinal De Pintos De Corte Originados De Matrizes Com Diferentes Idades E Submetidos Ao Estresse Por Calor Na Incubação

Leandro, Nadja Susana Mogyca; Gomes, Natali Almeida; Café, Marcos Barcellos; Carvalho, Fabyola Barros de; Stringhini, José Henrique; Laboissière, Michele

doi:10.1590/1089-6891v18e-34828

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…Moreover, studies showed that EST can also affect development of primary immune organs. For instance, histology of the bursa, gastrointestinal tract, spleen, and thymus at hatch were affected by high (38.1°C–39.0°C) incubator temperatures ( Oznurlu et al., 2010 ; Liu et al., 2013 ; Leandro et al., 2017 ). Therefore, adjustments in EST patterns can potentially improve embryo immune organ development.…”

Section: Introductionmentioning

confidence: 99%

Effects of eggshell temperature pattern during incubation on primary immune organ development and broiler immune response in later life

et al. 2020

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Eggshell temperature ( EST ) during incubation greatly affects embryo development, chick quality at hatch, and subsequently various broiler physiological systems. Until now, a constant EST of 37.8°C seems optimal. Data on effects of EST patterns on immune organ development and subsequent broiler immune response are, however, scarce. A higher EST of 38.9°C in week 2 and/or a lower EST of 36.7°C in week 3 of incubation potentially positively affect embryo immune organ development and broiler immune response post hatch. Broiler eggs (n = 468) were incubated at 4 different EST patterns (n = 117 eggs/treatment) from week 2 of incubation onward. Week 1 (embryonic age ( E )0 < E7) EST was 37.8°C for all eggs. Week 2 (E7 < E14) EST was either 37.8°C ( Control ) or 38.9°C ( Higher ), and week 3 (E14 - /hatch) EST was either Control or 36.7°C ( Lower ). At hatch, histology of bursal follicles and jejunum villi and crypts were determined as well as heterophil to lymphocyte ratio ( H:L) (n = 49). Posthatch, both sexes were grown in 8 pens/treatment for 6 wk (n = 320). Natural antibodies ( NAb ) were determined at day 14, 22, and slaughter (day 41 or 42) as an indicator of immunocompetence and response to a Newcastle disease ( NCD ) vaccination was determined by antibody levels at day 22 and slaughter (n = 128). Results showed no interaction EST week 2 × EST week 3, except for jejunum histology. Higher EST in week 2 resulted in lower cell density within bursal follicles ( P = 0.02) and a tendency for lower H:L ( P = 0.07) at hatch, and higher NCD titers at slaughter ( P = 0.02) than Control EST. Lower EST in week 3 resulted at hatch in higher cell density within bursal follicles, higher H:L (both P < 0.05), and a tendency for a higher posthatch mortality rate than control EST ( P = 0.10). In conclusion, higher EST in week 2 during incubation may benefit embryonic immune organ development and posthatch broiler immunocompetence, while lower EST in week 3 showed opposite indications.

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Section: Introductionmentioning

confidence: 99%

Effects of eggshell temperature pattern during incubation on primary immune organ development and broiler immune response in later life

et al. 2020

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“…Broilers born to older breeders showed a higher lymphocyte count in the bursa at 21 days of age. Leandro et al (2017) reported that chicks from older breeders exhibited greater immune response than chicks from young breeders, whereas birds from older breeders showed a larger follicular area in the bursa. At seven days of age, valine supplementation above 11.2 and 10.2 g/kg increased the lymphocyte count in the spleen and bursa, respectively, whereas the lymphocyte count in the thymus was not influenced by valine supplementation above 10.2 g/kg in the thymus of older breeders (Table 8).…”

Section: Discussionmentioning

confidence: 99%

Performance and immune response of broilers born to breeders of different ages and fed different valine levels

Silva¹,

Gomides²,

Mello³

et al. 2021

Revista Brasileira De Zootecnia

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“…O processo de depleção linfocitária é mediado por intensificação da morte celular programada, também conhecida como apoptose, principalmente na bolsa cloacal, tanto que este órgão é frequentemente adotado para avaliar a resposta em casos de estresse (Revidatti et al, 2002;Leandro et al, 2017;Sobhi et al, 2020;Wang et al, 2023).…”

Section: Variáveisunclassified

Vitamina C na ração de frangos de corte em estresse por calor cíclico

Teixeira,

Abreu,

Almendra

et al. 2023

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O experimento foi conduzido com o objetivo de avaliar o efeito da suplementação de vitamina C, sobre o desempenho, biometria do coração, dos órgãos digestivos e linfoides, histomoformetria da bolsa cloacal e rendimento de carcaça e cortes nobres de frangos de corte de 1 a 45 dias de idade, naturalmente submetidos a estresse por calor cíclico. Foram utilizados 400 frangos de corte da linhagem Cobb, em um delineamento experimental inteiramente casualizado, com cinco tratamentos: 0; 100; 200; 300; 400 ppm de vitamina C na ração. No período de 1 a 21 dias de idade os tratamentos influenciaram o ganho de peso, entretanto, não se observou efeito dos tratamentos sobre o consumo de ração e a conversão alimentar das aves. Na fase de 1 a 45 dias de idade, verificou-se que os tratamentos influenciaram de forma quadrática a conversão alimentar, que melhorou até o nível estimado de 206,19 ppm de vitamina C na ração. Os níveis de vitamina C suplementados influenciaram os rendimentos de carcaça e sobrecoxa. Porém, não se observou efeito dos tratamentos sobre os biometria dos órgãos digestivos e linfoides, além de não ter sido verificado influência sobre os parâmetros histomorfometria da bolsa cloacal de frangos de corte estressados por calor. A suplementação das rações com vitamina C melhora o desempenho zootécnico e o rendimento de carcaça em frangos de corte estressados por calor.

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Histomorfometria De Orgãos Linfoides E Desenvolvimento Intestinal De Pintos De Corte Originados De Matrizes Com Diferentes Idades E Submetidos Ao Estresse Por Calor Na Incubação

Cited by 4 publications

References 18 publications

Effects of eggshell temperature pattern during incubation on primary immune organ development and broiler immune response in later life

Effects of eggshell temperature pattern during incubation on primary immune organ development and broiler immune response in later life

Performance and immune response of broilers born to breeders of different ages and fed different valine levels

Vitamina C na ração de frangos de corte em estresse por calor cíclico

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