Evaluating antibacterial activity from essential oil of Artemisia fragrans Willd. in North-Western of Iran

Abstract

The antibacterial effects of Artemisia fragrans essential oil were studied in this research. The composition of essential oil from aerial parts was analyzed by GC/MS and its antibacterial effects were determined by disk diffusion method. In this study the antibacterial effects of essential oil of A. fragrans on two types of Gram positive bacteria Staphylococcus aureus, Strep. Enterococcus fecalis and Gram negative bacteria; Escherichia coli, Salmonella typhi, Pseudomonas aeruginosa and Klebsiella pneumonia by disk diffusion method on Mueller Hinton agar medium, were evaluated. The oil in concentrations 0, 10, 25, 50, 75, 100 percent prepared in DMSO and then 50 mg ml -1 A. fragrans essential oil was each was added to the specified disks. The present study describes the phytochemical profile and antibacterial activity of essential oil of A. fragrans. The antibacterial test results showed that the oil had a potential antibacterial activity against Gram positive bacterial strains that were mentioned. Essential oil showed maximum zone of inhibition concentration against Escherichia coli and Klebsiella pneumonia and minimal inhibition concentration against other Gram-negative bacteria that were studied.

Screening of bioactive compounds produced by streptomyces spp. Isolated from eastern honey bee (apis cerana) and stingless bee (tetragonula laeviceps)

“…Streptomyces, the filamentous gram-positive bacteria is the largest genus of the Actinobacteria with over 500 known species (Ikeda et al, 2003). Their genome contain high G-C content around 69-78% (Dehnad, 2010). Streptomyces species are nonmotile and catalase positive; besides they are able to reduce nitrates to nitrites, and degrade adenine, casein, gelatin, hypoxanthine, starch, and L-tyrosine.…”