Abstract
Haloxylon salicornicum was carried out in this study on Gram positive and Gram negative pathogenic bacteria and some species of fungi. The results exhibited variable susceptibilities of microorganisms for different concentration of phenolic extract. The activity of this extract was associated with high concentrations. Using plate method, phenolic extract of H. salicornicum had the highest effect and wide diameter of growth inhibition zone against Candida albicans and Klebsiella pneumonia, and it has no effect on growth of Asprigillus fumigatus and A.. terreus only when very high concentrations is used.