Oxidation-reduction potentials of haemolytic streptococci

PEROXIDE formation has a marked effect on the electrode potential behaviour of bacterial cultures and it has been shown in previous communications that the course of development of reducing and oxidising conditions in cultures of the peroxide-forming organisms haemolytic streptococci Certain of the characteristics in the behaviour of pneumococcus disappear when peroxide accumulation is prevented by addition of catalase to the cultures [1931, 1]. Nevertheless differences still remain between the reducing activities of pneumococcus cultures containing catalase on the one hand and, say, staphylococcus cultures on the other.