Where to buy Lactobacillus fermentum?

Lactobacillus fermentum is a Gram-positive species of bacterium in the genus Lactobacillus. It is associated with active dental caries lesions. It is also commonly found in fermenting animal and plant material. It has been found in sourdough. A few strains are considered probiotic or "friendly" bacteria in animals and at least one strain has been applied to treat urogenital infections in women. Some strains of lactobacilli formerly classified as Lactobacillus fermentum (such as RC-14) have since been reclassified as Lactobacillus reuteri.
Lactobacillus fermentum belongs to the genus Lactobacillus. Species in this genus are used for a wide variety of applications. These applications include food and feed fermentation. It has been found that some strains for Lactobacillus fermentum have natural resistances to certain antibiotics and chemotherapeutics. They are considered potential vectors of antibiotic resistance genes from the environment to humans or animals to humans.
Lactobacillus fermentum can also be a normal inhabitant of the human intestinal tract and some strains have been associated with cholesterol metabolism.
Transferable Resistance Genes
One important consideration to determine the safety of Lactobacillus fermentum is transferable resistant genes. In order for L. fermentum to be considered as a potential probiotic, it must not contain any transferable resistant genes. If a resistance gene is transferable, it could lessen the effect of the use of antibiotics. Out of ten common antibiotic genes that were tested (gatamicin, cefazolin, penicillin, trimethoprim/sulfmethoxazole, ampicillin, carbenicillin, erythromycin, amikacin, chloramphenicol, and norfloxacin), Lactobacillus fermentum was found to only be resistant to amikacin and norfloxacin. Others studies have reported that most LABs are also resistant to these antibiotics, which led to the conclusion that it was a common characteristic of LABs. The resistance to these antibiotics can be considered natural or intrinsic. So far no observed Lactobacillus fermentum strains have been observed to have transferable resistance or acquired resistance genes.
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