Antibacterial evaluation of Styrax pohlii and isolated compounds

Camila Spereta Bertanha, Susane Hellen Utrera, Valéria Maria Melleiro Gimenez, Milton Groppo, Márcio Luis Andrade e Silva, Wilson Roberto Cunha, Carlos Henrique Gomes Martins, Ana Helena Januário, Patrícia Mendonça Pauletti
2013 Brazilian Journal of Pharmaceutical Sciences  
The antibacterial activity of the compounds egonol (1) and homoegonol (2), of the crude ethanolic extract of Styrax pohlii (Styracaceae) aerial parts (EE), and of its n-hexane (HF), EtOAc (EF), n-BuOH (BF), and hydromethanolic (HMF) fractions was evaluated against the following microorganisms: Streptococcus pneumoniae (ATCC 6305), S. pyogenes (ATCC 19615), Haemophilus influenzae (ATCC 10211), Pseudomonas aeruginosa (ATCC 27853), and Klebsiella pneumoniae (ATCC 10031). The broth microdilution
more » ... th microdilution method was used for determination of the minimum inhibitory concentration (MIC) during preliminary evaluation of antibacterial activity. The EE yielded MIC values of 400 µg/mL for S. pneumoniae and P. aeruginosa and 300 µg/mL for H. influenzae. The HF and EF fractions exhibited enhanced antibacterial activity, with MIC values of 200 µg/mL against S. pneumoniae, but only EF displayed activity against H. influenzae (MIC 200 µg/mL). The best MIC value with compounds 1 and 2 (400 µg/mL) was obtained for (1) against S. pneumoniae and P. aeruginosa. Therefore, 1 exhibited weak antibacterial activity against these standard strains.
doi:10.1590/s1984-82502013000400004 fatcat:eb4kp3gh5bd3bfe5xq5jbfzrpe