The desirable type of acid-forming bacteria do not form spores; hence, are easily killed by heating the milk.
The fermentation which produces acid and the diffusion of acid-forming materials from the blood are alike prevented by it.
They differ from most of the elements so far studied in that they can act either as acid-forming or base-forming elements.
In cheese a certain amount of acid can be produced by the acid-forming bacteria.
The non-metals possessed physical properties which were the reverse of those of the metals, and were acid-forming in character.
Thus, the growth of acid-forming organisms in milk becomes checked by the formation of acid from the fermentation of the sugar.
These temperatures favor especially the growth of the acid-forming bacteria.
Thus, the acid-forming bacteria may be divided into two main groups, which may be designated as desirable and undesirable.
It does not do one much good to brush the teeth if he does not remove decaying and acid-forming matter from between the teeth.
Milk that has been fermented by the desirable kinds of acid-forming bacteria is not harmful.