Table 2

In vitro effects of pH, lactic and acetic acids on Pseudomonas aeruginosa PAO1 growth
Acid concentrations (mM) OD595nm of P. aeruginosa at different pH and acid concentrations*
Lactic acid pH 7 pH 6 pH 5 pH 4
0 0.60 ± 0.03 0.62 ± 0.01 0.43 ± 0.02 0.01 ± 0.00
50 0.74 ± 0.06 0.81 ± 0.11 0.47 ± 0.19 0.12 ± 0.01
100 0.65 ± 0.02 0.65 ± 0.02 0.23 ± 0.07 0.12 ± 0.01
Acetic acid pH 7 pH 6 pH 5 pH 4
0 0.60 ± 0.03 0.62 ± 0.01 0.43 ± 0.02 0.01 ± 0.00
12.5 0.70 ± 0.06 0.58 ± 0.02 0.38 ± 0.27 0.12 ± 0.01
25 0.63 ± 0.06 0.65 ± 0.09 0.11 ± 0.01 0.12 ± 0.00
50 0.56 ± 0.02 0.26 ± 0.07 0.11 ± 0.01 0.12 ± 0.01
100 0.77 ± 0.14 0.10 ± 0.01 0.11 ± 0.01 0.13 ± 0.01

*Each value is the mean of triplicates ± SD (ANCOVA), P. aeruginosa was incubated in BHI medium for 22 h in presence of different acid concentrations (acetic, lactic acid or HCl).

Alexandre et al.

Alexandre et al. BMC Microbiology 2014 14:107   doi:10.1186/1471-2180-14-107

Open Data