The present invention relates to a lactic acid bacterium, in particular a strain of the Streptococcus genus, with reduced sensitivity to cos-type bacteriophages. The invention also relates to methods to engineer these lactic acid bacteria as well as their use to ferment milk.

Foods are described that provide controlled release of stabilized bacteria into the oral cavity on consumption, as well as their use. Such foods promote colonization of oral surface by the bacteria. Bacteria are selected to treat an oral condition, such as oral disease, halitosis, and/or stained enamel on consumption of the food.

The present invention relates to a lactic acid bacterium, in particular a strain of the Streptococcus genus, with reduced sensitivity to cos-type bacteriophages. The invention also relates to methods to engineer these lactic acid bacteria as well as their use to ferment milk.

Methods are described that provide controlled release of beneficial bacteria to the oral cavity. Such bacteria can subsequently colonize the oral cavity and displace or suppress the growth of pathogenic microorganisms. Described devices include a stabilized preparation of such beneficial bacteria and provide a consumable liquid, wet foam, or gel that includes such bacteria when used.

The present invention relates to a lactic acid bacterium, in particular a strain of the Streptococcus genus, with reduced sensitivity to cos-type bacteriophages. The invention also relates to methods to engineer these lactic acid bacteria as well as their use to ferment milk.

Devices are described that provide controlled release of beneficial bacteria to the oral cavity. Such bacteria can subsequently colonize the oral cavity and displace or suppress the growth of pathogenic microorganisms. Described devices include a stabilized preparation of such beneficial bacteria and provide a consumable liquid, wet foam, or gel that includes such bacteria when used.