NCIt definition : A species of Gram positive, cocci shaped, lactic acid bacteria assigned to the phylum
Firmicutes. This species is nonmotile, catalase negative, nonsporulating and produces
lactic acid from lactose fermentation. L lactis may be an opportunistic pathogen in
humans and animals. Most significantly this microorganism is used commercially in
the production of buttermilk and cheese.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Lactococcus lactis.;