Abstract
The effect of sodium chloride on the chromogenesis and coagulase activity of pathogenic staphylococci isolated from surgical infections were studied, and following results were obtained.
1. 7.5% NaCl proteose lactose agar can be used for the test of chromogenesis of staphylococci, with slightly poorer result than milk agar, though better than ordinary nutrient agar.
2. Coagulase test with 7.5% NaCl proteose lactose agar culture, immediately after suspending the culuvre in broth of NaCl at low concentration, shows no enhancement of coagulation of plasma. For the enhancement of coagulase activity, incubation at 37°C after suspending in broth of NaCl at low concentration is necessary.
