ABSTRACT
OBJECTIVE: To evaluate the antibacterial action of an extract of geopropolis produced by the bee Melipona compressipes fasciculata on the concentration of Streptococcus mutans colonizing the oral cavity of young patients. Forty-one young volunteers performed 21 mouth rinses divided into three rinses per day for 7 days, with no other changes in their oral hygiene and dietary habits. Saliva was collected at three time points: before the first rinse, and one hour and 7 days after the first rinse. A reduction in the concentration of S. mutans was observed in 49 percent of all samples collected after use of the extract, 26 percent showed no alterations, and an increasing in S. mutans was observed in 25 percent. Was performed with the Statistica for Windows 5.9 program using the Kruskal-Wallis test for analysis of variance and the Mann-Whitney U test, with the level of significance set at 5 percent. The propolis extract possesses in vivo antimicrobial activity against S. mutans present in the oral cavity and might be used as an alternative measure to prevent dental caries.