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Updated: Aug 23, 2026

Preparation, Imaging, and Quantification of Bacterial Surface Motility Assays
Published on: April 7, 2015
[Effect of para-aminobenzonic acid (PABA) on cell-surface hydrophobicity of Streptococcus mutans]
Yan-hong Li1, Xue-dong Zhou, Xiao-rong Xiao
1Dept. of Preventive Dentistry, First Affiliated Hospital, Kunming Medical University, Kunming 650031, China.
Objective:
To study the effect of Para-aminobenzonic acid on cell-surface hydrophobicity of Streptococcus mutans.
Methods:
Microbial adhesion to hydrocarbons (MATH) was used to measure the cell-surface hydrophobicity of Streptococcus mutans which grew in modified Carlsson medium with different dilutions of PABA.
Results:
The cell-surface hydrophobicity of Streptococcus mutans increased when Carlsson medium contained low dilution of PABA. But following the increase of PABA, the cell-surface hydrophobicity decreased.
Conclusion:
Para-aminobenzonic acid could inhibit the adherence of Streptococcus mutans through changing its cell-surface hydrophobicity.
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