Lacticaseibacillus paracasei (commonly abbreviated as Lc. paracasei) is a gram-positive, heterofermentative species of lactic acid bacteria that are commonly used in dairy product fermentation and as probiotic cultures. Lc. paracasei is a bacterium that operates by commensalism. It is commonly found in many human habitats such as human intestinal tracts and mouths as well as sewages, silages, and previously mentioned dairy products. The name includes morphology, a rod-shaped (bacillus shape) bacterium with a width of 2.0 to 4.0μm and length of 0.8 to 1.0μm.
Strains of L. paracasei have been isolated from a variety of environments including dairy products, plants or plant fermentations, and from the human and animal gastrointestinal tracts. A protracted refrigeration period before in vitro gastrointestinal transit (GIT) did not affect or influenced very weakly cell resistance.
