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A special germ, deficient diet and predisposing conditions in the mouth combine to foster decay of teeth, according to Drs. F. E. Rodriguez and R.A. Kelser, of the Army Medical School, Washington. Dr. Rodriguez has found that an individual germ of the lactic acid family is the one responsible for the piercing of the hard enamel of the teeth and exposing the soft dentine inside to many different types of bacteria. It thrives in an acid medium, and itself produces an acid condition.
The germs a
