Hepatic heat shock proteins, antioxidant-related genes, and immunocompetence of heat-stressed broilers in response to short periods of incubation during egg storage and thermal conditioning

Hemida, Mona A.; Abdel-Fattah, S. A.; Madkour, Mahmoud; Aboelenin, Mohamad M.; Ahmed, Sarah Y.A.; Shourrap, Mohamed

doi:10.1016/j.jtherbio.2023.103640

Cited by 6 publications

(6 citation statements)

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“…This thermal conditioning was maintained consistently for 6 h per day, from 10:00 a.m. to 4:00 p.m., over a period of five consecutive embryonic days (E14–E18). As a result, four experimental sub-groups were formed, namely S0TC0, S1TC0, S0TC1, and S1TC1 as reported by 8 .…”

Section: Methodsmentioning

confidence: 99%

“…The first group, S0 (control), was kept under specific conditions at a temperature of 15.8°C ± 0.4 and relative humidity (RH) of 75% for a period of up to 20 days. The second group, labeled as S1, experienced the SPIDES method on days 5, 10, and 15 following egg collection, as described by 8 , 16 . After the 20-day storage period, all eggs were transferred to an automatic setter provided by a local manufacturer, where they were subjected to an incubation protocol consisting of 37.6 ± 0.02 °C and 60.5% of RH.…”

Section: Methodsmentioning

confidence: 99%

“…The average body weight gain (BWG), feed consumption (FC), and feed conversion ratio (FCR) were calculated, FCR was calculated as per gram feed consumed per gram weight produced (g feed/g weight gain).. The environmental temperature, relative humidity, and THI throughout the entire experimental duration as reported in the first part of this study in 8 . THI in the present study ranged from 29.5 to 33.5.…”

Section: Methodsmentioning

confidence: 99%

“…This suggests that the broilers were raised in conditions characterized by significant heat stress. The weekly calculated values of THI have been mentioned 8 (it will useful to show data in a table to see this conditions of stress after 24 days of raising, period when 33.5 THI should be stressing to the chicken broilers).…”

Section: Methodsmentioning

confidence: 99%

“…Recently, the application of SPIDES has been shown to modify the conventional technique used in hatcheries 6 , 7 . This modification aims to improve egg quality following extended periods of storage, leading to enhanced chick quality and improved performance in the future 8 .…”

Section: Introductionmentioning

confidence: 99%

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Growth performance, histological and physiological responses of heat-stressed broilers in response to short periods of incubation during egg storage and thermal conditioning

Abdel-Fattah,

Madkour,

Hemida

et al. 2024

Sci Rep

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The short periods of incubation during egg storage (SPIDES) method enhances the quality of chicks and improves hatching rates. Additionally, embryonic thermal conditioning (TC) is a technique used to enhance thermotolerance in birds. Previous studies have evaluated the effects of SPIDES and embryonic TC separately. Yet, our hypothesis postulated that a synergistic effect could be achieved by integrating TC and SPIDES, thereby enhancing the broilers' resilience to thermal stress. We conducted an experiment involving 800 Ross broiler eggs, divided into two groups. The first group, referred to as S0, was maintained under standard storage room conditions and acted as our control group. The second group, known as S1, underwent a process called SPIDES for 5 h at a temperature of 37.8 ± 0.1 °C, on three occasions: days 5, 10, and 15 following egg collection. Upon reaching the 14th day of incubation (DOI), each of these primary groups was randomly subdivided into two equal subgroups. The control subgroup, designated as TC0, remained in the usual incubation conditions. Meanwhile, the other subgroup, TC1, was subjected to prenatal heat conditioning at a temperature of 39.5 ± 0.1 °C for 6 h per day, commencing on the 14th embryonic day (E) and extending until the 18th embryonic day (E). This experimental setup resulted in four distinct experimental subgroups: S0TC0, S1TC0, S0TC1, and S1TC1. The findings indicated that the combined application of SPIDES and TC had a significant positive effect on chick performance after hatching. Specifically, the (S1TC1) group exhibited the heaviest live body weight (LBW) and body weight gain (BWG) at the marketing age in comparison to the other groups. Furthermore, both SPIDES and TC had a positive influence on the relative weights of breast muscles and their histological measurements. The (S1TC1) group displayed significantly higher values in terms of the relative weight of breast muscles and the number of myocytes. In conclusion, SPIDES and TC have beneficial effects on pre- and post-hatch characteristics of broiler chicks up until the marketing age. Additionally, TC techniques improve chick performance, particularly under conditions of heat stress, and enhance the yield of breast muscle in later stages of life.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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