The influence of abnormal (‘non-acid’) milk on cheese starter cultures

Abstract
If milk containing the inhibitory substance produced by growth of ‘non-acid’ streptococci is used for the propagation of starter, it can cause delayed coagulation, simulating a starter failure caused by bacteriophage. ‘Non-acid’ milk in the starter culture milk affects cultures differently according to the particular strains of streptococci present; some strains are considerably less inhibited than others.