the essential oil of peucedanum ru t h e n i c u m fruits, obtained by hydrodistillation, was analyzed by gas chromatography and gas chromatography mass spectrometry. among the 31 identified constituents accounting for 83.9% of the total oil, the major components were 1,8-cineole (11.15%), camphor (5.86%), z-carveol (6.88%), l-carvone (5.61%), 8,9-dehydroisolongifolene (11.35%), caryophyllene o...

Outer membrane of Gram-negative bacteria is a permeability barrier to many antibacterial agents, including the glycopeptide antibiotics such as vancomycin hydrochloride and as a result these antibiotics are ineffective against Gram negative bacteria. Different strategies have been described to overcome such limitation, including application of nanoparticles, as was shown in our previous studies...

71 samples of milk and dairy products were collected from 18 cities throughout Iran. 93 strains of lactic acid bacteria (LAB) were isolated and assayed against four opportunistic patho gens including E. coli, proteus and klebsiella as gram-negative and S. aureus as a gram-positive organism. All indicators (organisms) were hospital strains. Among isolated bacteria, lactobacilli (37 isolates)...

antimicrobial resistance in pathogens not only in hospitals but also in the community has become an important public health problem. the aim of this study was to determine the antimicrobial resistance patterns of predominant pathogens from hospitalized and outpatients in a university hospital in tehran, iran. a total of 820 samples of common gram-negative and gram-positive bacteria were collect...

results out of 2229 suspected meningitis cases, 255 (11.4%) were detected as positive culture. most of the isolates were gram-positive cocci, which 116 (45.5%) were staphylococcus epidermidis, and 20 (7.8%) identified as streptococcus spp. among gram-negative isolates, escherichia coli and acinetobacter spp., each with 19 isolates (5.9%), were predominant. overall, the most effective antibiotic...