Limosilactobacillus fermentum is a Gram-positive species in the heterofermentative genus Limosilactobacillus. It is associated with active dental caries lesions.[2] It is also commonly found in fermenting animal and plant material[3] including sourdough[4][5] and cocoa fermentation.[6] A few strains are considered probiotic or "friendly" bacteria in animals [7] and at least one strain has been applied to treat urogenital infections in women.[8] Some strains of lactobacilli formerly mistakenly classified as L. fermentum (such as RC-14) have since been reclassified as Limosilactobacillus reuteri.[9] Commercialized strains of L. fermentum used as probiotics include PCC,[10] ME-3[11] and CECT5716
^Kandler, Otto; Stetter, Karl-Otto; Köhl, Ruth (September 1980). "Lactobacillus reuteri sp. nov., a New Species of Heterofermentative Lactobacilli". Zentralblatt für Bakteriologie: I. Abt. Originale C: Allgemeine, angewandte und ökologische Mikrobiologie. 1 (3): 264–269. doi:10.1016/S0172-5564(80)80007-8.