Avaliação preliminar da atividade antibacteriana do extrato etanólico das folhas de Lippia alba (Mill.) N.E. Br. frente as cepas Gram-positiva e Gram-negativa

TELES, Simone; FRANÇA, Suelen Oliveira; SILVA, Franceli; EVANGELISTA-BARRETO, Norma Suely; PIMENTA, Maria Gardenny Ribeiro

Preliminary evaluation of the antibacterial activity of the leaves of Lippia alba (Mill.) N.E. Br. ethanolic extract against Gram-positive and Gram-negative strains

Authors

TELES, Simone Universidade Federal do Recôncavo da Bahia (UFRB)
FRANÇA, Suelen Oliveira Universidade Federal do Recôncavo da Bahia (UFRB)
SILVA, Franceli Universidade Federal do Recôncavo da Bahia (UFRB)
EVANGELISTA-BARRETO, Norma Suely Universidade Federal do Recôncavo da Bahia (UFRB)
PIMENTA, Maria Gardenny Ribeiro Universidade Federal do Recôncavo da Bahia (UFRB)

Keywords:

Antimicrobial activity, Cidreira, Disk diffusion techique

Abstract

The aim of this study was to evaluate the antibacterial activity of the ethanolic extract of Lippia
alba leaves against Gram-positive strain (Staphylococcus aureus ATCC 6538) and Gram-negative
strain (Escherichia coli ATCC 25922). Antibacterial activity was performed by disk diffussion
method. The results showed activity of the extract against the Gram-positive strain, with
measures of 7 mm diameter of the bacterial growth inhibition area formed around the disc with
extract. For Gram-negative strain there was no antimicrobial activity. The extract tested showed
antibacterial activity against Gram-positive strain and potential to optimization the extract
extraction and solubilization method.