Kvasny Prum. 1974; 20(12): 265-267 | DOI: 10.18832/kp1974033

Effects of Zn, Cd and Hg salts upon the propagation of Lactic bacteria.Peer-reviewed article

J. ŠAVEL, M. PROKOPOVÁ

The authors have carried out a series of experiments to study the effects of Zn, Cd and Hg salts upon the growth of eight strains of lactobacilli and seven strains of pediococci. Strains used in experiments have been taken partly from collections and partly isolated from beer. The inhibiting effects diminish in the following sequence: Hg >=Cd>Zn. Salts of Cd and Zn suppress the growth of pedicocci more effectively than that of lactobacilli. Minimum inhibiting concentration of cadmium chloride (CdCl₂ . 2,5 H₂O) in solid medium preparated from fermented wort and other substances is 200 - 1400 mg/l for pediococci. Salt sof Zn have simile effects, but for the same inhibiting efficiency their concentration must be substantially higher. Hg salts suppress the growth of lactobacilli with the same intensity as that of pediococci.
(In Czech, English summary only)

Keywords: lactic bacteria, propagation, Zn, Cd, Hg

Published: December 1, 1974