Streptococcus faecalis, a group of bacteria belonging to the phylum Eubacteria, the class Ascomycetes, the order Micrococcus, the family Micrococcus and the genus Streptococcus;

Lactic acid bacteria are a kind of bacteria that can ferment sugar to produce lactic acid, but most of them can't decompose protein.

Of course, there are differences, and the scope of definition is different from the audience.

In fact, Streptococcus lactis is a common industrial bacterium among lactic acid bacteria. Used in the production of "lactase" tablets and feed health additives for livestock and poultry.