Lactobacillus 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.

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 the properties & benefits of probiotics are strain-specific, this database provides even more detailed information at the level of the strain.

Read more about the strains we have included from this species: Lactobacillus rhamnosus LGG®, Lactobacillus rhamnosus GR-1® and Lactobacillus rhamnosus Rosell-11.


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.

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