3.2. Quantitative Comparison of C. concisus Growth under AnaeroH2− and AnaeroH2+ Conditions
To further compare the growth of C. concisus strains under AnaeroH2+ and AnaeroH2− conditions, the CFUs of 12 C. concisus strains grown under these two atmospheric conditions were determined. All strains had a greatly increased growth under AnaeroH2+ condition in comparison to the AnaeroH2− condition. The CFU numbers of all 12 C. concisus strains grown under AnaeroH2+ condition were significantly higher than those of the respective strains grown under AnaeroH2− condition (P < 0.05) (Table 2).