2022
DOI: 10.3389/fphys.2022.809648
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Meta-Analysis and Systematic Review of the Thermal Stress Response: Gallus gallus domesticus Show Low Immune Responses During Heat Stress

Abstract: Heat stress, which affects broiler growth performance and immunity, is a major concern in the poultry industry. This meta-analysis aimed to demonstrate the significant effect of heat stress on broiler mass gain and immunoglobulin levels, which regulates the mortality rate of broilers. A total of 2,585 studies were downloaded from PubMed, Web of Science, and Google Scholar from January 1, 2015, to September 1, 2021. Eventually, 28 studies were selected based on specific criteria. The results for body mass gain,… Show more

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Cited by 12 publications
(10 citation statements)
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“…While the gastrointestinal ecosystem is relatively well-regulated and is not expected to exhibit prominent alterations in response to moderate fluctuations in ambient conditions in endothermic animals, young nestlings of altricial passerines cannot regulate their body temperatures 25 . Therefore, even moderate fluctuations in microclimatic conditions can trigger physiologic stress in nestlings and consequently, influence the immune system 26 . Although we still know very little about how these alterations translate into gut microbiota 27 , some studies revealed an increased microbial diversity with elevated temperatures 28 , probably due to suppression of immune response.…”
Section: Discussionmentioning
confidence: 99%
“…While the gastrointestinal ecosystem is relatively well-regulated and is not expected to exhibit prominent alterations in response to moderate fluctuations in ambient conditions in endothermic animals, young nestlings of altricial passerines cannot regulate their body temperatures 25 . Therefore, even moderate fluctuations in microclimatic conditions can trigger physiologic stress in nestlings and consequently, influence the immune system 26 . Although we still know very little about how these alterations translate into gut microbiota 27 , some studies revealed an increased microbial diversity with elevated temperatures 28 , probably due to suppression of immune response.…”
Section: Discussionmentioning
confidence: 99%
“…As expected, we observed that the prevalence of different diseases and broiler growth performance were altered by different environmental conditions. It has been reported that the high temperature is responsible for the lower immunity level in broilers (Siddiqui et al 2022). As a consequence, this increases the disease susceptibility of broilers (Monson et al 2018), which leads to a high mortality rate (Brossi et al 2018).…”
Section: Discussionmentioning
confidence: 99%
“…To build a valid search query that will retrieve as many relevant documents as possible, specific keywords were used. Several “systematic reviews” and “bibliometric analyses” articles were reviewed to build a search query for heat stress and poultry production ( Liu et al, 2020 ; Leishman et al, 2021 ; Siddiqui et al, 2022 ).…”
Section: Methodsmentioning
confidence: 99%