Effects of heat stress on some blood parameters and egg production of Shika Brown layer chickens transported by road

Ajakaiye, J. J.; Ayo, Joseph Olusegun; Ojo, S. A.

doi:10.4067/s0716-97602010000200006

Cited by 42 publications

(30 citation statements)

References 35 publications

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“…Both the vitamin E-and TQ-treated groups revealed significant increases in the WBC count during heat stress. Our results agree with the results of Ajakaiye et al (2010), who attributed the increase in the WBC count to antioxidant activity of vitamin E; similarly, TQ could increase the WBC count, depending on the role of TQ in free radical scavenging (Hadjzadeh et al, 2008). In this study, ALT was significantly decreased in the HS-treated group, but AST levels showed a decrease during the heat stress period that was not significant.…”

Section: Discussionsupporting

confidence: 83%

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Effects of vitamin E and thymoquinone on physiological and histological characteristics of heat-stressed male mice

Alzahrani¹

2011

Afr. J. Pharm. Pharmacol.

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Previous studies have shown that heat stress can lead to tissue damage and multiple organ dysfunctions. The present study elucidates the negative effects of heat stress and the possible protective effects of vitamin E or thymoquinone against the physiological and histological consequences of heat stress. Forty male mice were distributed into four groups as follows: group I was a control group that was orally supplemented with distilled water; group II was subjected to heat stress (HS) (at a humidity of 50 to 55% and a temperature of 42°C) for 75 days; group III was subjected to heat stress and was orally supplemented with vitamin E (20 IU/kg body weight/day for 75 days); and group IV was subjected to heat stress and was orally supplemented with thymoquinone (TQ) (5 mg/kg body weight/day for 75 days). We found that the leucocyte count, Hb, and alanine aminotransferase (ALT) were significantly decreased in the HS-treated group. In contrast, the free radical (FR) levels were significantly elevated. Moreover, histopathological and ultrastructural studies of the HS-treated group revealed dilatation of the hepatic sinusoids, interstitial hemorrhage, hepatocytes that were infiltrated with fat droplets in the liver, hemorrhage enlargement of the mitochondria and dilatation of the renal tubules. Notably, supplementation with either TQ or vitamin E completely reversed the biochemical, histopathological and ultrastructural changes that were induced by heat stress yielding levels that were similar to the control values. Taken together, our data revealed the benefits of vitamin E or TQ supplementation as a means to ameliorate the negative effects of heat stress.

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Section: Discussionsupporting

confidence: 83%

“…Previous studies have indicated that vitamin E as an additive in feed can reduce the complications of heat stress (Ajakaiye et al, 2010). Moreover, supplementation with various levels of vitamin E has been shown to improve growth performance and the immune responses of broilers under heat stress (Niu et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of vitamin E and thymoquinone on physiological and histological characteristics of heat-stressed male mice

Alzahrani¹

2011

Afr. J. Pharm. Pharmacol.

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“…Besides modulating the immune response to pathogenic infections by producing proinflammatory cytokines, another important function of monocytes is their ability to give rise to tissue macrophages (Auffray et al 2009). Heat stress (Altan et al 2000) or transport (Ajakaiye et al 2010) reduced monocyte.…”

Section: Resultsmentioning

confidence: 99%

Adaptation to organic rearing system of eight different chicken genotypes: behaviour, welfare and performance

Castellini

Mugnai

Moscati

et al. 2016

Italian Journal of Animal Science

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The aim of the study was to define poultry adaptability to organic system, through the assessment of several endpoints. Eight hundred male birds of slow-growing birds (Ancona: A, Leghorn: L, crossbreed Cornish Â Leghorn: CL), medium-growing (Gaina: G, Robusta Maculata: RM, Kabir: K, Naked Neck: NN) and fast-growing strains (Ross: R) were organically reared. A and L genotypes displayed a quicker reaction time when submitted to tonic immobility test, and a great variety of behaviour and exploiting all the pasture area. Concerning feather conditions L, A, CL G and RM showed the best values for all considered body regions, as well as the absolute absence of foot pad and breast blister lesions. Static behaviour of R and G chickens did not produce a significant oxidative burst whereas, the active behaviour of A, slow-growing birds, increased the oxygen demand. Plasma a-tocopherol followed the trend of kinetic and foraging activity being higher in slow-, intermediate in medium-and lower in fast-growing birds. The adaptability index showed the best result of slow-growing strains with intermediate results in medium-growing and the worst in fast-growing ones. There is a negative linear correlation between adaptation and daily weight gain. However, within the same sub-group (slow, medium and fast), there is no correlation between daily weight gain and adaptation to an organic system. Even if R chickens had the highest productive performance, they appeared no adapted to the organic system. Daily weight gain (<50 g/d) is a prerequisite for chicken adaptation, but even birds with similar weight gains showed wide variations in the adaptation. ARTICLE HISTORY

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“…Results obtained by Ajakaiye et al (2010) indicate that stress factors can affect the morphology of blood. A decrease in the total number of leukocytes, as well as lymphopaenia and granulocytosis, is most often observed.…”

Section: A Bmentioning

confidence: 98%

The effect of aloe preparation and 5-oxo-1,2,4-triazine on immunological and haematological indices of blood of turkey hens subjected to stress

2015

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The aim of this study was to determine the effect of aloe extract or 5-oxo-1,2,4-triazine on immunological and haematological indices during artificially induced stress in turkey hens. The experiment was carried out on 360 turkey hens (6 groups). The groups C and C+stress were the control groups and did not receive any additive. Birds from the groups A and A+stress were administered aloe extract at the amount of 0.70 ml/kg body weight (bw)/day. The turkey hens from the groups T and T+stress received 5-oxo-1,2,4-triazine at the amount of 30 μg/kg bw/day. The additives were administered in the birds' drinking water twice for 28 days (days 36-63 and 78-105) of the birds' life. On days 61-63 and 103-105 a stress factor (simultaneous crowding and a change in temperature and lighting) was introduced in the groups C+stress, A+stress and T+stress for 1 hour a day. The results showed that the applied stress factors caused a significant (P ≤ 0.05) decrease in the lysozyme level and % phagocytic cells, as well as a non-significant reduction in the metabolic activity of heterophils. Under the influence of stress an increase (P ≤ 0.05) in the percentage of monocytes and basophils was observed. The use of aloe preparation improved some indicators of immunity (increased, P ≤ 0.05, lysozyme and % phagocytic cells) in the turkey hens. To alleviate the negative effect of stress on immune reactions, supplementation of diets with aloe extract supplemented with resveratrol and vitamin C may be considered.

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Effects of heat stress on some blood parameters and egg production of Shika Brown layer chickens transported by road

Cited by 42 publications

References 35 publications

Effects of vitamin E and thymoquinone on physiological and histological characteristics of heat-stressed male mice

Effects of vitamin E and thymoquinone on physiological and histological characteristics of heat-stressed male mice

Adaptation to organic rearing system of eight different chicken genotypes: behaviour, welfare and performance

The effect of aloe preparation and 5-oxo-1,2,4-triazine on immunological and haematological indices of blood of turkey hens subjected to stress

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