TABLE 3.
Effect of bovine catalase on inhibition of N. gonorrhoeae strain FA1090 by lactobacilli or increasing concentrations of H2O2
| pH, lactobacillus, and/or H2O2 concn | Effecta of bovine catalase concnb in overlay agar on inhibition
|
||||
|---|---|---|---|---|---|
| 0 U | 0.5 U | 5 U | 50 U | 500 U | |
| Base agar pH 7.4 | |||||
| L. crispatus | + | + | − | − | − |
| L. jensenii | + | + | − | − | − |
| 18 mM H2O2 | + | − | − | − | − |
| 50 mM H2O2 | + | + | − | − | − |
| 100 mM H2O2 | + | + | − | − | − |
| Base agar pH 5.8 | |||||
| L. acidophilus | + | + | + | + | − |
| L. crispatus | + | + | + | + | − |
| L. jensenii | + | + | + | − | − |
| L. gasseri | + | + | + | − | − |
| 18 mM H2O2 | + | − | − | − | − |
| 50 mM H2O2 | + | + | − | − | − |
| 100 mM H2O2 | + | + | − | − | − |
a
Symbols: +, inhibition; −, absence of inhibition.
b
Catalase concentration is expressed in units per mg of protein (1 U decomposes 1 μmol of H2O2 per min at 25°C and pH 7.0).