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Lactococcus lactis is used in the production of buttermilk and cheese. Lactococcus lactis is what is known as a gram positive bacteria.
Yes is negative
From what I've found... Lactococcus lactis won't grow on a 6.5% plate while enterococcus faecalis will. Hope that helps!
-VE
in the broth they will be packed close together and more spread out in the slant