الفهرس 
Title : Evaluating the role of some types of probiotic on the performance of rabbits in Egypt and South Africa
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Abstract
The experiment aimed to study the effect of dietary supplementation probiotics
(Saccharomyces boulardii and Bio-Plus) and organic selenium on hematological
parameters, immune responses, meat quality, caecum content and productive
performance of V-Line growing rabbits. A total number of 54 weaned V-Line rabbits
were randomly divided into 6 equal treatments (9 rabbits / treatment). The 1st
treatment (T1) served as control. The 2nd treatment (T2) rabbits received 0.6 g
Saccharomyces boulardii (S.b.) / kg diet. The 3rd treatment (T3) rabbits received 0.4 g
Bacillus subtilis and Bacillus iicheniformis (Bio-Plus) / kg diet. The 4th treatment (T4)
rabbits received 0.6 g S.b. + 0.4 g Bio-Plus / kg diet. The 5th treatment (T5) rabbits
received 0.3 mg organic selenium / kg diet. The 6th treatment (T6) rabbits received 0.6
g S.b. + 0.4 g Bio-Plus + 0.3 mg organic selenium / kg diet. The results showed that,
supplementation of rabbit’s diets with different types of probiotics and/or organic
selenium led to significantly improvement in growth performance (body weight, body
weight gain and feed conversion) of V-Line rabbits as compared to control group.
Selenium % of rabbit’s meat was increased (P<0.05) in the rabbits of T5 and T6 as
compared to other treatments. Thiobarbituric acid reactive substance was decreased
(P<0.05) in the meat rabbits of T5 and T6 as compared to other treatments. IgG, IgM
and IgA were significantly increased in the rabbits of T6 compared to rabbits in
control group. Hb concentration, Ht %, glucose, total lipids, total protein and globulin
were increased (P<0.05) in the rabbits of T6 as compared to control group. Volatile
fatty acids (VFA) levels were significantly increased in the rabbits of T2, T3, T4, T5
and T6 compared to control group. Ammonia level was decreased (P<0.05) in the
rabbits of T3, T5 and T6 compared to rabbits on control group. Bacteria count was
decreased (P<0.05) in the rabbits of T3, T4, T5 and T6 compared to rabbits in control
group. Supplementation different types of probiotics and organic selenium improved
economic indicator of treated groups compared to the control group. In conclusion,
supplementation of different types of probiotics and organic selenium (0.6 g S.b. + 0.4
g Bio-Plus + 0.3 mg organic selenium / kg diet) had a beneficial effect on growth
performance, immunological parameters and good health status of rabbit.
Nevertheless, further studies are required to assess the efficacy of dietary probiotics
on rabbits reared under hot environmental conditions.