Heat stress impairs egg production in commercial laying hens infected by fowl typhoid

Rubio, Marcela da Silva; Alves, Lucas Bocchini Rodrigues; Viana, Guilherme de Brito; Benevides, Valdinete Pereira; Lima, Túlio Spina de; Ferreira, Taísa Santiago; Almeida, A. Bugalho de; Barrow, Paul; Berchieri, Ângelo

doi:10.1080/03079457.2020.1845302

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…In our study, heat treatment (32 °C) led to negative effects, including a decrease in egg production (25%), egg weight (4.9 g), and egg mass (18.43 g/day), in hens reared under heat stress. Our current results showing decreased laying rates are consistent with previous findings [ 6 , 29 ], which reported that heat stress reduced egg production in heat-stressed laying hens. Other researchers have also shown that exposure to either cyclic or constant heat stress for 1 week could decrease the EW [ 7 , 8 ].…”

Section: Discussionsupporting

confidence: 93%

Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Yan

et al. 2022

Animals

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This study was conducted to elucidate the molecular mechanisms underlying heat stress (HS)-induced abnormal egg-laying in laying hens. Hy-Line brown laying hens were exposed to HS at 32 °C or maintained at 22 °C (control) for 14 days. In addition, granulosa cells (GCs) from preovulatory follicles were subjected to normal (37 °C) or high (41 °C or 43 °C) temperatures in vitro. Proliferation, apoptosis, and steroidogenesis were investigated, and the expression of estrogen and progesterone synthesis-related genes was detected. The results confirmed that laying hens reared under HS had impaired laying performance. HS inhibited proliferation, increased apoptosis, and altered the GC ultrastructure. HS also elevated progesterone secretion by increasing the expression of steroidogenic acute regulatory protein (StAR), cytochrome P450 family 11 subfamily A member 1 (CYP11A1), and 3b-hydroxysteroid dehydrogenase (3β-HSD). In addition, HS inhibited estrogen synthesis in GCs by decreasing the expression of the follicle-stimulating hormone receptor (FSHR) and cytochrome P450 family 19 subfamily A member 1 (CYP19A1). The upregulation of heat shock 70 kDa protein (HSP70) under HS was also observed. Collectively, laying hens exposed to high temperatures experienced damage to follicular GCs and steroidogenesis dysfunction, which reduced their laying performance. This study provides a molecular mechanism for the abnormal laying performance of hens subjected to HS.

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Section: Discussionsupporting

confidence: 93%

Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Yan

et al. 2022

Animals

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“…Heat-exposed ducks showed lower egg production and reduced oviduct weight and length, and the number of matured ovarian follicles ( Ma et al, 2014 ; Oluwagbenga et al, 2022 ). Other studies on laying hens showed similar results, egg production and quality were significantly depressed in heat-stressed hens ( Mashaly et al, 2004 ; Rubio et al, 2021 ). When hens are subjected to HS, their feed intake decreases, which affects the availability of nutrients and leads to the lower egg production and quality ( Mashaly et al, 2004 ; Mazzoni et al, 2022 ).…”

Section: Introductionsupporting

confidence: 70%

Heat stress and poultry production: a comprehensive review

Oluwagbenga,

Fraley

2023

Poultry Science

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“…Increasing summer temperatures under the influence of the global greenhouse effect have been an important factor interfering with the production of traditional farming industries (Zaboli et al, 2019;Rubio et al, 2021). The avian egg industry was being severely affected because of birds' unique physiological structure.…”

Section: Introductionmentioning

confidence: 99%

Effects of Bamboo Vinegar on Production Performance, Egg Quality, Antioxidant Status, and Serum Biochemistry of Laying Hens in Summer

Wang

Yan

et al. 2023

Braz. J. Poult. Sci.

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This study investigated the effects of bamboo vinegar (BV) on production performance, egg quality, antioxidant status, and serum biochemical parameters of laying hens during summer. One hundred twenty 36-week-old Hy-Line Brown laying hens were randomly assigned to 4 groups, with 30 hens per group. The control group was fed a basal diet and 1 mL/kg, 5 mL/kg, and 10 mL/kg BV were added to the basal diet of the 0.1% BV, 0.5% BV and 1.0% BV groups, respectively. The experiment lasted 30 days and showed that the production performance was not significantly affected by the addition of BV (p>0.05). Egg shape index and glutathione peroxidase activity in serum in BV-supplemented groups were significantly increased (p<0.05). The total protein and the albumin content in the 0.1% BV, 0.5% BV, and 1.0% BV groups were significantly increased compared to the control group (p<0.05). These results suggested that dietary BV could improve the antioxidant capacity and the egg shape index of laying hens in summer.

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Heat stress impairs egg production in commercial laying hens infected by fowl typhoid

Cited by 6 publications

References 30 publications

Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Heat stress and poultry production: a comprehensive review

Effects of Bamboo Vinegar on Production Performance, Egg Quality, Antioxidant Status, and Serum Biochemistry of Laying Hens in Summer

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