Abstract

Bachir Raho ghalem* and Benali Mohamed

The essential oil from the gum of Pistacia atlantica Desf. grown in Algeria was obtained by the hydrodistillation method, and its antimicrobial activities against the growth of clinical isolates of Staphylococcus aureus, Escherichia coli and Streptococcus pyogenes were evaluated using the agar disc diffusion, the minimal inhibitory quantity (MIQ) determination method and the liquid phase by Maruzella method. The results of the study revealed that essential oil resin of P. atlantica has antimicrobial activity against Gram-positive as well as Gram negative bacteria resistant to commonly used antimicrobial agents, and they were considerably dependent upon concentration.