Probiotic Supplementation in the Diet of Rabbits-A Review
Livestock Research International
Probiotic are advocated as an alternative to antibiotic for growth promotion. They are live culture of non pathogenic organisms which are administered orally and are defined as live microbial feed supplements, which beneficially affect the host by improving its intestinal balance. Probiotic products are available in the form of oral paste, water feed additives and include microbial cell, microbial culture and microbial metabolites. Most probiotic get destroyed by up to 80 percent in the
... cent in the presence of antibiotics or when mixed with antimycoplasma drug in the feed. The term "pronutrient" is used in place of probiotic. The US food and drug administration used the term Direct Feed Microbiotics' (DFM) instead of probiotics and the manufactures were directed to write DFM on their products. Microorganisms used in animal feeds are mainly bacterial strains belonging to different genera and microscopic fungi. A dose of 10 6 to 10 7 CFU/gm of feed administered continuously is necessary to obtain a balance between probiotic microorganisms and bacteria of resident micro-flora in the gut. The microbial species used in the probiotic preparation include Lactobacillus acidophilus, L. bifidus, L. bulgarians, L. casie, L. lactis, Streptococcus faecium, Bifidobacterium bifidum, Aspergillus oryzae and L. ruminis. Probiotic strains had positive effect on animals and result as bio-regulators of the intestinal micro-flora and reinforcing the host's natural defences. Probiotic represents addition of live microorganisms in feed showing positive effects by maintaining eubiosis. Normal gut micro-flora provides normal mucosal function, increase digestibility and stimulates motility and immunity. The use of probiotics had many potential benefits and included: modified host metabolism, immune-stimulation, anti-inflammatory reactions, exclusion and killing of pathogens in the intestinal tract, reduced bacterial contamination on processed broiler carcasses, enhanced nutrient absorption and performance and ultimately decreased human health risk.