PRESERVATION OF FOODS WITH NON-LACTOSE FERMENTING STREPTOCOCCUS LACTIS SUBSPECIES DIACETILACTIS

A method for using selected strains of Streptococcus lactis subspecies diacetilactis, which have been modified to be non-lactose fermenting, for the preservation of foods containing lactose is described. The subspecies is more generally known as Streptococcus diacetilactis. The selected Streptococcu...

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1. Verfasser:	GONZALES, CARLOS F
Format:	Patent
Sprache:	eng
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY COMPOSITIONS THEREOF CULTURE MEDIA DAIRY PRODUCTS, e.g. MILK, BUTTER, CHEESE ENZYMOLOGY FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES MAKING THEREOF METALLURGY MICROBIOLOGY MICROORGANISMS OR ENZYMES MILK OR CHEESE SUBSTITUTES MUTATION OR GENETIC ENGINEERING PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL PROCESSES USING MICROORGANISMS PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS SPIRITS THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR TREATMENT, NOT COVERED BY OTHER CLASSES VINEGAR WINE
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Zusammenfassung:	A method for using selected strains of Streptococcus lactis subspecies diacetilactis, which have been modified to be non-lactose fermenting, for the preservation of foods containing lactose is described. The subspecies is more generally known as Streptococcus diacetilactis. The selected Streptococcus diacetilactis strains have been modified by curing to remove at least one natural plasmid which controls the fermentation of lactose to lactic acid while retaining the ability of this subspecies to inhibit bacterial spoilage in foods. The plasmid removed by curing is about 41 megadaltons (Mdal) in mass. The method using the modified strains of Streptococcus diacetilactis is particularly adapted for the preservation of milk products.