Hegab, I., Eman, A., Rania, A., El-Azzazi, F. (2019). EFFECT OF PROBIOTICS ON PRODUCTIVE, PHYSIOLOGICAL AND MICROBIOLOGICAL PARAMETERS OF NEW ZEALAND WHITE RABBITS REARED UNDER HOT SUMMER CONDITIONS. Egyptian Poultry Science Journal, 39(3), 599-614. doi: 10.21608/epsj.2019.46933
I. M. Hegab; A. Attia Eman; A. Hassan Rania; Fakhri E El-Azzazi. "EFFECT OF PROBIOTICS ON PRODUCTIVE, PHYSIOLOGICAL AND MICROBIOLOGICAL PARAMETERS OF NEW ZEALAND WHITE RABBITS REARED UNDER HOT SUMMER CONDITIONS". Egyptian Poultry Science Journal, 39, 3, 2019, 599-614. doi: 10.21608/epsj.2019.46933
Hegab, I., Eman, A., Rania, A., El-Azzazi, F. (2019). 'EFFECT OF PROBIOTICS ON PRODUCTIVE, PHYSIOLOGICAL AND MICROBIOLOGICAL PARAMETERS OF NEW ZEALAND WHITE RABBITS REARED UNDER HOT SUMMER CONDITIONS', Egyptian Poultry Science Journal, 39(3), pp. 599-614. doi: 10.21608/epsj.2019.46933
Hegab, I., Eman, A., Rania, A., El-Azzazi, F. EFFECT OF PROBIOTICS ON PRODUCTIVE, PHYSIOLOGICAL AND MICROBIOLOGICAL PARAMETERS OF NEW ZEALAND WHITE RABBITS REARED UNDER HOT SUMMER CONDITIONS. Egyptian Poultry Science Journal, 2019; 39(3): 599-614. doi: 10.21608/epsj.2019.46933
EFFECT OF PROBIOTICS ON PRODUCTIVE, PHYSIOLOGICAL AND MICROBIOLOGICAL PARAMETERS OF NEW ZEALAND WHITE RABBITS REARED UNDER HOT SUMMER CONDITIONS
11 Dept. of Hygiene, Zoonosis and Anim. Behaviour and Management, Fac. of Vet. Medicine, Suez Canal Univ., Ismailia, Egypt.
22 Dept. of Botany. (Med. Mycol.), Fac. of Sci., Suez Canal Univ., Ismailia, Egypt.
3Dept. of Anim. Wealth Develop., Fac. of Vet. Medicine, Suez Canal Univ., Ismailia, Egypt.
4Department of Animal Production, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt.
Abstract
The effect of two kinds of probiotics different in their mode of actions was tested on rabbits’ performance grew under hot summer conditions. Fifty-six New Zealand White rabbits (5-weeks-old) were fed on growing diet and orally supplemented with Saccharomyces cerevisiae (S. cerevisiae)0.5, 1 and 1.5 g., Lactobacillusacidophilus (L. acidophilus) 1, 2 and 3×109 CFU/kg body weightor distilled water as a control. Calculated temperature humidity index was classified as severe heat stress. Significant improvements in productive parameters, (average daily gain and feed conversion ratio) were detected in the high-dose group (3×109 CFU/kg) of L. acidophilus. Similarly, the haemoglobin concentration, red blood cell count and fT3 serum levels were considerably higher in the L. acidophilus groups, with significantly lower cortisol levels. The mean duration of anxiety-related behavioural responses in the open field test showed significant improvements in treated groups. Also, microbiological investigation showed an absence of some pathogenic bacterial species (Salmonella spp, Clostridium spp and Enterobacteria spp)in treated groups and the presence of beneficial yeast species (Yarrowia lipolytica) in the L. acidophilus-supplemented groups. Conclusively, administration of S. cerevisiae and L. acidophilus for consecutive 8 weeks may counteract the consequences of chronic heat stress in growing rabbits.
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