In view of the growing concern with about sub-therapeutic uses of AGP in animal; feed and greater appreciation of the role of the microbial ecology of the gastro-intestinal tract (GIT) in determining animal productivity, increasing numbers of probiotic products are being developed and used in animal nutrition and feeding Bacillus species are superior probiotic feed-additives for poultry and pigs due to their big genomes with relevant/desirable features. B. subtilis is certified as "generally recognized as safe" by Food and Drug Administration and features in the last of European Food Safety...