Evaluation of antibacterial effects of Aqueous extracts of Achillea millefolium and Teucrium polium plants on ten human pathogenic bacteria

Infectious diseases are one of the most important agents of mortality in the world. Due to resistant of some human infectious bacteria to antibiotics, use of plant pharmaceutical herbs to control of these agents is increasing. The aim of this research was to investigate the antibacterial effect of aqueous extract of Yarrow and Salvia against ten bacterial strains of human pathogenic bacteria. Aqueous extract from Achillea millefolium and Teucrium polium species were prepared using maceration method and then were concentrated and dried using rotary apparatus.. Ten standard bacterial strains were cultured on Nutrient Broth. Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of plant extract of both extract on bacteria were determined using micro dilution method at four different concentrations (0/62-1/25-2/5-5-10mg/ml). The results showed that aqueous extract from Achillea millefolium and Teucrium polium species have an inhibition effect on all tested bacteria. Staphylococcus aureus and S. saprophyticus showed the highest and lowest sensitivity to water extract of yarrow respectively. Pseudomonas aeroginosa sereus strain showed high degree of sensitivity whereas S. aureuss and Bacillus aeroginosa strains were less sensitive to extract of salvia. According to obtained results in this work and other researches in this domain, the Aqueous extracts of Yarraw and Salvia could be introduced as a biocontrol agent against pathogenic micro-organisms. Nevertheless to use each extract of plant for clinical application, chemical analysis of extracts and clinical researches are necessary.