Resumo

CASTRO, Ricardo Dias de et al. In vitro antibacterial action of natural products on Lactobacillus casei. IJD, Int. j. dent. [online]. 2010, vol.9, n.2, pp. 74-77. ISSN 1806-146X.

It was aimed to evaluate, in vitro, the antibacterial activity of hydroalcoholics extracts obtained from the leaves of Eugenia uniflora L. (Pitangueira), the peel of the stem of Persea Americana Mill. (Abacateiro), and the peel of the fruits of Citrus limon L. (Limoeiro) and Sicana odorífera L. (Cruá) against Lactobacillus casei (ATCC 7469). The antibacterial action was determined by the Minimum Inhibitory Concentration (MIC) of bacterial growth. Hydroalcoholics extracts were tested by the diffusion method using blood agar, through wells technique. There was no formation of halos of inhibition of the bacterral growth for Citrus limon L. and Sicana odorifera hydroalcoholics extracts. However, it was verified antibacterial activity for Eugenia uniflora L., which showed a MIC of 6,25mg/mL. The Persea americana L. extract had a CIM of 25mg/mL. Among the natural products evaluated only Eugenia uniflora L and Persea americana L showed antibacterial action against Lactobacillus casei.

Palavras-chave : Medicinal plants; Oral Biofilm; Minimal Inhibition Concentration.