Aromatic Mesophilic (YV32) is a freeze dried mixed strain culture containing: Lactoccus lactis subsp. cremoris, Lactoccus lactis subsp.lactis, Leuconostoc, and Lactoccus lactis subsp. diacetylactis. Aromatic Mesophillic is a gas producing culture, where little air pockets will be observed in the cheese. If gas is not desired, then use the Mesophillic Culture. Each packet contains 5 sachets; each sachet doses 4 L of milk.