Penicillinase Production in Some Bacilli

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Science  07 Dec 1962:
Vol. 138, Issue 3545, pp. 1108-1109
DOI: 10.1126/science.138.3545.1108


Penicillinase production in strains of bacillus in which such production is constitutive, as well as in strains in which it is inducible, was found to be a function of the type of penicillin to which the organism was exposed. A repressive effect in two constitutive strains was noted. An increase in the level of penicillinase produced by the constitutive strains was noted for some of the penicillins.