scholarly journals Effects of a Direct Fed Microbial (DFM) on Broiler Chickens Exposed to Acute and Chronic Cyclic Heat Stress in Two Consecutive Experiments

2022 ◽  
pp. 101705
Author(s):  
A.H. Sarsour ◽  
D.A. Koltes ◽  
E.J. Kim ◽  
M.E. Persia
Keyword(s):  
Heat Stress ◽  
Broiler Chickens ◽  
Cyclic Heat

scholarly journals Evaluation of Three Formulations of Essential Oils in Broiler Chickens under Cyclic Heat Stress

Animals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1084
Author(s):  
Jared Ruff ◽  
Guillermo Tellez ◽  
Aaron J. Forga ◽  
Roberto Señas-Cuesta ◽  
Christine N. Vuong ◽  
...  
Keyword(s):  
Heat Stress ◽  
Essential Oils ◽  
Broiler Chickens ◽  
Bone Mineralization ◽  
Body Core Temperature ◽  
Control Group ◽  
Group 4 ◽  
Body Core ◽  
Cyclic Heat ◽  
Group 2

The objective of the present research was to assess the dietary supplementation of three formulations of essential oils (EO) in chickens under heat stress (HS). Day-of-hatch Cobb 500 chicks (n = 500) were randomly distributed into four groups: 1. HS control + control diets; 2. HS + control diets supplemented with 37 ppm EO of Lippia origanoides (LO); 3. HS + control diets supplemented with 45 ppm LO + 45 ppm EO of Rosmarinus officinalis (RO) + 300 ppm red beetroot; 4. HS + 45 ppm LO + 45 ppm RO + 300 ppm natural betaine. Chickens that received the EO showed significant (p < 0.05) improvement on BW, BWG, FI, and FCR compared to control HS chickens. Average body core temperature in group 3 and group 4 was significantly (p < 0.05) reduced compared with the HS control group and group 2. Experimental groups showed a significant reduction in FITC-d at 42 days, a significant increase in SOD at both days but a significant reduction of IFN-γ and IgA compared with HS control (p < 0.05). Bone mineralization was significantly improved by EO treatments (p < 0.05). Together these data suggest that supplemental dietary EO may reduce the harmful effects of HS.

scholarly journals Effects of Nano Emulsified Vegetable Oil and Betaine on Growth Traits and Meat Characteristics of Broiler Chickens Reared under Cyclic Heat Stress

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1911
Author(s):  
Alaeldein M. Abudabos ◽  
Gamaleldin M. Suliman ◽  
Abdullah N. Al-Owaimer ◽  
Ali R. Al Sulaiman ◽  
Abdulrahman S. Alharthi
Keyword(s):  
Heat Stress ◽  
Vegetable Oil ◽  
Broiler Chickens ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Feed Conversion ◽  
Cyclic Heat ◽  
And Performance ◽  
Dietary Treatments ◽  
Environmental Temperatures

The effects of nano-emulsified vegetable oil (NEVO) and betaine (BET) supplements on growth performance and meat qualities of broilers reared under cyclic heat stress (HS) were investigated. Two hundred and eighty-eight mixed-sex broilers at 21 d were randomly distributed to a 2 × 3 factorial arrangement of treatments formed by two environmental temperatures (thermoneutral (TN; 24 ± 1 °C) and cyclic high-temperature (HT; 35 ± 1 °C)) and three dietary treatments (control (CON), NEVO, and BET). The cumulative performance (21–35 d) revealed a reduction in average daily gain (ADG) (p < 0.05) in the CON compared to NEVO. NEVO and BET groups had a better feed conversion ratio (FCR) and performance efficiency factor (PEF) compared with the CON (p < 0.001, p < 0.01, respectively). The environmental temperature affected daily feed intake (DFI), ADG, FCR, and PEF. The addition of BET improved breast fillets yield, temperature, pH15min, and pH24hr (p < 0.05) in comparison with the CON. Moreover, the TN group had lower fillet temperature and higher pH15min compared to the HT. Moreover, HT increased shear force (SF), hardness, springiness, cohesiveness, and chewiness of the fillets compared to TN. In conclusion, dietary supplementation with BET and NEVO could effectively improve performance parameters and meat characteristics under HS conditions.

Body Weight, Intestinal Morphometry and Cell Proliferation of Broiler Chickens Submitted to Cyclic Heat Stress

2011 ◽  
Vol 10 (6) ◽  
pp. 455-460 ◽  
Author(s):  
C.F.P. Marchini ◽  
P.L. Silva ◽  
M.R.B.M. Nascimento ◽  
M.E. Beletti ◽  
N.M. Silva ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Body Weight ◽  
Heat Stress ◽  
Broiler Chickens ◽  
Cyclic Heat ◽  
Intestinal Morphometry

scholarly journals Bacillus subtilis-Based Probiotic Improves Skeletal Health and Immunity in Broiler Chickens Exposed to Heat Stress

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1494
Author(s):  
Sha Jiang ◽  
Fei-Fei Yan ◽  
Jia-Ying Hu ◽  
Ahmed Mohammed ◽  
Heng-Wei Cheng
Keyword(s):  
Bacillus Subtilis ◽  
Heat Stress ◽  
Broiler Chickens ◽  
Heat Waves ◽  
Stress Sensitivity ◽  
Current Data ◽  
Negative Effects ◽  
Skeletal Health ◽  
Welfare Issue ◽  
And Performance

The elevation of ambient temperature beyond the thermoneutral zone leads to heat stress, which is a growing health and welfare issue for homeothermic animals aiming to maintain relatively constant reproducibility and survivability. Particularly, global warming over the past decades has resulted in more hot days with more intense, frequent, and long-lasting heat waves, resulting in a global surge in animals suffering from heat stress. Heat stress causes pathophysiological changes in animals, increasing stress sensitivity and immunosuppression, consequently leading to increased intestinal permeability (leaky gut) and related neuroinflammation. Probiotics, as well as prebiotics and synbiotics, have been used to prevent or reduce stress-induced negative effects on physiological and behavioral homeostasis in humans and various animals. The current data indicate dietary supplementation with a Bacillus subtilis-based probiotic has similar functions in poultry. This review highlights the recent findings on the effects of the probiotic Bacillus subtilis on skeletal health of broiler chickens exposed to heat stress. It provides insights to aid in the development of practical strategies for improving health and performance in poultry.

scholarly journals Dietary Grape (Vitis vinifera) Seed Powder and Zn–Gly Chelate Complex for Mitigating Heat Stress in Broiler Chickens: Growth Parameters, Malondialdehyde, Paraoxonase-1, and Antibody Titer

Agriculture ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1087
Author(s):  
Muhammad Israr ◽  
Naila Chand ◽  
Rifat Ullah Khan ◽  
Ibrahim A. Alhidary ◽  
Mutassim M. Abdelrahman ◽  
...  
Keyword(s):  
Heat Stress ◽  
Antibody Titer ◽  
Broiler Chickens ◽  
Growth Traits ◽  
Growth Parameters ◽  
Control Diet ◽  
Paraoxonase 1 ◽  
Control Treatment ◽  
Broiler Chicks ◽  
Feed Conversion

A total of 300 day old broiler chicks (Hubbard) were assigned to 30 floor pens (10 birds per pen) under cyclic heat stress. Three diets including a control, as well as two levels of grape seed powder (GSP) and zinc (OZ) at the rates of 2.5 g/kg GSP + 50 mg/kg OZ and 5 g/kg GSP + 50 mg/kg OZ, were supplied to the broilers for 35 days. According to the results, broiler feed intake improved (p < 0.05) in GSP + OZ groups from 3–5 weeks and on an overall basis compared to the control diet. Body weight increased (p < 0.05) in GSP-5 + OZ-50 during weeks 2–5 and on an overall basis. The findings indicated that feed conversion ratio (FCR) decreased (p < 0.05) during week 5 in broilers supplemented with GSP-5 + OZ-50. The antibody titer (HI) against Newcastle disease (ND) was higher (p < 0.05) in GSP + OZ groups compared to control treatment. The value of malondialdehyde (MDA) decreased (p < 0.05) under GSP + OZ diets compared to control. Moreover, paraoxonase (PON1) was higher (p < 0.05) in GSP + OZ groups compared to untreated broilers. In conclusion, GSP + OZ positively supported growth traits, reduced MDA, and augmented PON1 and HI titer against ND in broilers exposed to heat stress.

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