Abstract
ABSTRACT Staphylococcus aureus was sensitive to as little as 100 μg sodium nitrite (NaNO2)/mL under strictly anaerobic conditions at pH 7.3 and was more sensitive at pH 6.0. S. aureus was less sensitive to NaNO2 in the presence of 1.0‐1.5 μg O2/mL. NaNO2 disappeared during growth of S. aureus. Disappearance was greater in the system containing 1‐1.5 μg‐O2 than in strictly anaerobic cultures at an initial pH of 7.3 or 6.0. Nitrite reductase activity was not detected in either soluble or membrane fractions of S. aureus. Interaction of NaNO2 with secreted metabolic products, dismutation of NaNO2 by reduced pH and adsorption of NaNO2 to S. aureus cells were not involved in the disappearance of NaNO2. Nitrite, nitric oxide, nitrous oxide and ammonia were not end products of NaNO2 disappearance.
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