The antimicrobial activity of the extract of the stem bark of Anacardium occidentale L., was evaluated in three cultures of bacteria of the dental plate. The antimicrobial activity was assayed in Petri dishes using the diffusion method for determination of the minimal inhibitory concentration (MIC) and minimal inhibitory concentration of adherence (MICA). Aureolar inhibition (MIC) was observed with concentrations of 12.5 mg/mL in S. mutans and 6.25 mg/mL in S. mitis and S. sanguis. The results suggest that the extract has effect in the MICA in concentrations of 0.31 mg/mL in S. mutans and S. mitis and of 0.15 mg/mL in S. sanguis and therapeuticly can be used in the dentistry as an antibacterial agent.
Anacardium occidentale; antimicrobial activity; dental biofilm
