Abstract
BACKGROUND: The range of thermoneutral zone of chickens is narrow, and they become easily susceptible to environmental stress, a common and major concern for poultry causing a production loss. OBJECTIVE: The present study was designed to comparatively evaluate anti-stress activity of Phytocee™ and Vitamin C in chickens reared under heat stress. MATERIALS AND METHODS: A total of 600-day-old chicks of Cobb 400 were randomly assigned to 4 groups with 6 replicates comprising 25 birds each (n = 150). G1 served as a normal control (NC) and supplemented with Vitamin C at 100 g/ton of feed. G2 served as a heat stress control (HSC), subjected to heat stress (34°C-36°C) without Vitamin C supplementation. G3 and G4 served as positive control and treatment group (TC), subjected to heat stress and supplemented with Vitamin C and Phytocee™ at 100 g/ton of feed, respectively. The impact on zootechnical parameters and cloacal temperature was assessed at regular intervals, and blood was collected at the end of the experiment for evaluation of stress parameters, namely heterophil lymphocyte ratio (H:L ratio) and serum corticosterone. RESULTS: Exposure of chickens to heat stress caused a significant decrease in body weight, worsening of feed conversion ratio, higher mortality, and poor production efficiency. Moreover, serum corticosterone level, H:L ratio, and cloacal temperature were significantly increased in HSC as compared to NC. However, supplementation of Phytocee™ in feed significantly ameliorated the negative impact of heat stress in broiler birds. CONCLUSION: The supplementation of Phytocee™ demonstrated an anti-stress effect in chickens through restoration of serum corticosterone level, H:L ratio, and thermoregulatory mechanism. SUMMARY: Combating heat stress remains a challenge for the broiler industry in the tropics and subtropics, which is even aggravated by the changing climatic conditionsThe present study was designed to evaluate the anti-stressor activity of Phytocee™, a polyherbal formulation containing Emblica officinalis, Ocimum sanctum, and Withania somnifera in broiler using heat stress model in comparison with Vitamin CPhytocee™ demonstrated an anti-stress effect in the current study by ameliorating the negative effects of heat stress on zootechnical parameters, serum corticosterone, heterophil lymphocyte ratio, and cloacal temperature of broilers through modulating the hypothalamic-pituitary-adrenal axis and thermoregulatory mechanismHence, Phytocee™ could be recommended in broilers and livestock animals for modulating and combating adverse effects of heat stress and thereby reducing the economic losses incurred by farmers. Abbreviations Used: HPA axis: Hypothalamic pituitary adrenal axis.