EETC suppresses bacterial growth. Inhibitory effect of EETC on the growth of Streptococcus mutans (S. mutans), Aggregatibacter actinomycetemcomitans (A. actinomycetemcomitans), and different types of dental plaque bacteria (DPB#1, DPB#2, and DPB#3) compared with ampicillin (Amp). The data shown are representative of three independent experiments