Streptococcus belongs to an order of lactic acid bacteria.
Lactobacillales or lactic acid bacteria ( LAB ) are an order of Gram-positive , low-GC , acid-tolerant , generally nonsporulating , nonrespiring , either rod - or coccus-shaped bacteria that share common metabolic and physiological characteristics . Streptococcus is a genus of coccus ( spherical ) Gram-positive bacteria belonging to the phylum Firmicutes and the order Lactobacillales ( lactic acid bacteria ) .