Taxonomic Study of High Carbon Dioxide-Producing Lactic Acid Streptococci Isolated from Mixed-Strain Starter Cultures

A taxonomic and serological investigation was carried out on strains of high CO~producing lactic acid streptococci isolated from commercial mixed-strain starter cultures cnusing the floating curd defect in cottage cheese. Non-CO.,-producing lactic acid streptococci found in mixed-strain starter cultures also were studied. Known cultures designated as Streptococcus lactis~ Streptococeu.~ cremori.~, Strel)to(occ~s diacetiIaeti.% Leuco~tostoc citrovorum, and Leuouostoe dextranicum were ineludcd for comparative purposes.