DEFINITION

Lacticaseibacillus rhamnosus (formerly known as Lactobacillus rhamnosus) is a Gram-positive, rod-shaped, heterofermentative non-spore-forming bacterium. Cells are nonmotile rods often with square ends, occurring singly or in chains. Arginine is not hydrolyzed. Suitable cryoprotectants may be added to the concentrated bacteria following fermentation, after which the product is frozen and then freeze-dried. The formulated product may be blended with suitable diluents and/or bulking agents. It contains NLT 100% of the labeled viable cell count of the appropriate strain of Lacticaseibacillus rhamnosus.

• Strain HN001: Lacticaseibacillus rhamnosus HN001 (ATCC 5675) is a pure, specific strain of L. rhamnosus. It is a non-d-lactate producer strain. It contains plasmids.

• Strain GG: Lacticaseibacillus rhamnosus GG (ATCC 7017) is a pure, specific strain of L. rhamnosus. It is a non-d-lactate producer strain. It contains no plasmid.

• Strain Lr-32: Lacticaseibacillus rhamnosus Lr-32 (ATCC 5217) is a pure, specific strain of L. rhamnosus. It is a non-d-lactate producer strain. It contains no plasmid.