Abstract
Summary Strains of Staphylococcus carnosus and Staphylococcus pisciferatentans are employed in food fermentations. The organisms arc expected to perform among other desired reactions an effective reduction of nitrate and nitrite. We have investigated the potential to perform these reactions with resting cells of S. carnosus (16 strains) and S. piscifermentans (10 strains). It was observed that all strains reduced nitrite and three strains that were investigated in more detail formed ammonia as the only metabolic end product. The reduction of nitrite was inhibited in the presence of nitrate, whereas neither amino acids nor ammonia exhibited an effect on the reaction. Nitrite and nitrate are used as terminal electron acceptors and support growth under anaerobic conditions as evidenced by the increase in growth yield. These data are consistent with a dissimilatory type of nitrite reduction.
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