The definition of DFM is extensive and contains a variety of organisms such as viruses, yeast, bacteria, and cell fragments. The DFM increase in the rumen has a favorable impact on the microbial ecosystem.
DFM is used from the ruminants around the world that may be categorized into three big categories: fungal, bacterial, or a mix of both. For more information about direct fed microbials you can visit https://www.feedworks.com.au/direct-fed-microbials-for-poultry-5-key-attributes/.
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The most common one of them is the bacterial DFM which may further be categorized as lactic acid-producing bacteria (LAB), next is lactic acid using bacteria (LUB) and other germs.
The most frequent genus used in DFM is lactobacillus, propionibacterium, bacillus, and a few other crucial germs like prevotella bryantii and megasphaera elsdenii.
Using those bacteria allow the manufacturers to decrease the period in adaptation to high concentrate diet and reduce the incidence of acidosis in lactating animals
Lactic acid-producing bacteria:
Lactic acid-producing bacteria are more effective because they are environment friendly and may change the environment using numerous mechanics. The lactic acid made by LAB is one of the critical substances that could alter the pH of these competitor germs.
Other bacteria: Some other kinds of germs like bifidobacterium spp. and bacillus spp. have been successfully utilized as DFM.
The endospores made by bacillus spp. are environmentally secure and thermo-tolerant that make these germs competitively superior in making sure their survival through storage or pelleting.