Lactobacillus rhamnosus (Lacticaseibacillus rhamnosus)

This species of Lactobacillus was originally considered to be a subspecies of Lactobacillus casei; however, further genetic research determined that Lactobacillus rhamnosus was a separate species. The bacteria from this species are often found in chains, and are gram positive, anaerobic, and rod shaped.

As of April 2020 L. rhamnosus has been officially reclassified to Lacticaseibacillus rhamnosus (Zheng J et al., 2020).

Lactobacillus rhamnosus bacteria typically exist in the human digestive system, but this species is also considered to be particularly important for female intimate health as certain Lactobacillus rhamnosus strains are also known to colonise in the vaginal environment. Other strains from the species are found in fermented foods such as yogurt and other dairy products, especially semi-hard cheeses.

As some properties & benefits of probiotics may be strain-specific, this database provides even more detailed information at strain level. Read more about the strains that we have included from this genus below.

Lactobacillus acidophilus strains: Lactobacillus acidophilus LA-05, Lactobacillus acidophilus NCFM®Lactobacillus acidophilus Rosell-52.

Lactobacillus casei strains: Lactobacillus casei ShirotaLactobacillus casei DN-114001.

Lactobacillus plantarum strains: Lactobacillus plantarum LP299v.

Lactobacillus reuteri strains: Lactobacillus reuteri Protectis and Lactobacillus reuteri RC-14®.

Lactobacillus rhamnosus strains: Lactobacillus rhamnosus LGG®, Lactobacillus rhamnosus HN001Lactobacillus rhamnosus GR-1® and Lactobacillus rhamnosus Rosell-11.

Lactobacillus paracasei strains: Lactobacillus paracasei CASEI 431®.

For more insights and professional updates on probiotics, please visit the Probiotic Professionals pages.


Lactobacillus rhamnosus GG (ATCC 53103) and its Probiotic Use. MicrobeWiki [ONLINE] Available at: [Accessed 8 June 2017].
Lee Y. and Salminen S., (2009), Handbook of Probiotic and Prebiotics. 2nd edition, Hoboken: John Wiley & Sons.
Reid G., (1999), ‘The scientific basis for probiotic strains of Lactobacillus’. Applied and Environmental Microbiology, 65(9):3763-3766.

Zheng J, Wittouck S. et al., (2020) 'A taxonmonic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae'. Int.J.Syst.Evol.Microbiol, 70(4): 2782-2858. DOI: 10.1099/ijsem.0.004107

Information on this species was gathered by Joanna Scott-Lutyens BA (hons), DipION, Nutritional Therapist; and Kerry Beeson, BSc (Nut.Med) Nutritional Therapist.