DIRECT FED MICROBIAL AND FUNGAL ADDITIVES IN RUMINANTS
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Date
2015
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Abstract
Before birth, developing animals are sterile in the womb of their mothers. Upon birth, the
digestive tracts of all animals are naturally colonized by a variety of microorganisms. Under
healthy and non-stressful conditions, “beneficial” microflora colonizes the rumen and lower
gut in a symbiotic relationship with the host. Beneficial rumen and gut microorganisms
supply nutrients to the host, aid in digestion of dietary nutrients, and compete with potential
pathogens. There is good evidence that the bacterial and fungal probiotics are effective in the
manipulation of rumen development and function. More recently, growing concern over the
use of antibiotics and other growth stimulants in animal feeds, the potential risk of antibiotic
residues appearing in meat and milk, and the need for a food supply that is perceived as safe
by consumers, has prompted many livestock producers to explore alternative strategies to
enhance the overall health and performance of their herd or flock. Direct-fed microbials
(DFM), or probiotics as they traditionally have been called, is one such naturally occurring
product that has been incorporated into livestock diets in an attempt to accomplish this
objective. DFM, particularly yeast cultures, stimulate growth of rumen bacteria in contrast to
ionophores and antibiotics, which are toxic to selective bacteria.
Description
TNV_IJSET_2015_4(3)716-720
Keywords
Veterinary Science