NCIt definition : A genus of Gram-positive facultative anaerobic or microaerophilic bacteria in the
phylum Firmicutes.;
Alternative definition : NCI-GLOSS: A type of bacterium that makes lactic acid (a substance that is made from
sugars found in milk and is also made in the body). Lactobacilli usually do not cause
disease, but may cause tooth decay. They are normally found in the mouth, gastrointestinal
tract, and vagina. They are being studied in the prevention of infections in patients
having donor stem cell transplants and in other conditions.; CDISC: Any bacteria that is not assigned to the species level but can be assigned
to the Lactobacillus genus level.;