title: Antimicrobial studies on extracts of four species of stachys.
abstract: The antimicrobial activity of the methanol extracts of the dried flowering aerial parts of Stachys byzantina, S. inflata, S. lavandulifolia and S. laxa (Labiatae) were studied using the disc diffusion method and determination of minimum inhibitory concentration (MIC) values against Staphylococcus aureus, Streptococcus sanguis, Escherichia coli, Pseudomonas aeroginosa, Klebsiella pneumoniae, Aspergilus niger and Candida albicans. The extracts of plants exhibited concentration-dependent antibacterial activity against the bacteria tested. The extracts were more active against Gram-positive microorganisms. The extracts, however, did not show any antifungal activity.
authors.affiliation: Department of Pharmaceutics, Faculty of Pharmacy, Mazandaran University of Medical Sciences, POBox 48175-861, Sari, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Saeedi
authors.forename: K
authors.initials: K
authors.lastname: Morteza-Semnani
authors.forename: M R
authors.initials: MR
authors.lastname: Mahdavi
authors.forename: F
authors.initials: F
authors.lastname: Rahimi