Antibacterial effects alcholic extracts of (Astragalus hamosus) on gram positive and gram negative bacteria

The space are aware of dangerous side effects of synthetie antibiotics, the more demand will be appeared on natural alternatives of this drug. Natural materials lessen the danger of these side effects; even they would left suitable and useful side effects. Plant pterygium is the one which has most applications in traditional medicine. The aim of this study is to investigate the anti bacterial effects of plant pterygium alchol essence on pathogenic bacteria. In this experiment, pterygium plant was used with scientific name of Astragalus hamosus. After providing alcholic essence of the plant the influence of mg/m1400, mg/m1200, mg/ml100, mg/m150 densities was investigated on staphylococcus aureus, Bacillus cereus, Escherichia coli and pseudomonas aeruginosa in loop dispersion method. The least controlling density determination test of bacteria growth and minimum bacteria fatality was carried out using halo in tube method. Findings of this study indicated that Astragalus hamosus plant alcholic essence prevents staphylococcus aureus, Bacillus cereus, Escherichia coli and pseudomonas aeruginosa bacteria growth. Measuring bacteria not growing was determined in loop dispersion method. Controlling effects on bacteria growth in loop dispersion method was better and more effective than disk dispersion method in similar densities. Astragalus hamosus plant alcholic essence has considerable controlling effects on pathogenic bacteria. Clinical studies are needed to consider these essences.