conclusions according to this study, pumice powder and slurry used in dental laboratories of hamadan are contaminated. therefore, the laboratory staff should be aware of the hazards posed by the presence of pathogens in dental laboratories. materials and methods forty specimens, including 20 pumice powders and 20 pumice slurries were collected from 10 randomly selected dental laboratories and i...

it is possible to develop new biodegradable active packaging by coating biopolymers on paper-based packaging material and also incorporating proper antimicrobial agents into coating structure. in this study bacterial contamination of two commercial cardboard were evaluated.in order to manufacture an appropriate antibacterial packaging material, coating of chitosan-poly vinyl alcohol blends with...

Six unsymmetrical diorganyltellurium(IV) dichlorides RR'TeCl2 (where R= phenacyl-, 1-naphthacyl-, and styrylacyl- and R' = p-methoxyphenyl, p-hydroxyphenyl-, and 3-methyl-4-hydoxyphenyl-) were tested for their antibacterial activity against gram-positive (Bacillus subtilis ATCC 6633 and Staphylococcus aureus ATCC 25923) and gram-negative (Escherichia coli ATCC 25922. Pseudomonas aeruginosa ATCC...

The in vitro and in vivo activities of DW286, a novel fluoronaphthyridone with potent antibacterial activity, were compared with those of ciprofloxacin, gemifloxacin, sparfloxacin, and trovafloxacin. Against gram-positive bacteria, such as Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pneumoniae, and Enterococcus faecalis, the in vitro activity of DW286 was stronger than that...

The aim of the present study was to investigate the antimicrobial activity and phytochemical screening of Carica papaya, Piper nigrum and Datura stramonium plant extracts. Ethanol and Methanol were used as the solvents for extraction. The antimicrobial activities of these plant extracts were tested against the drug resistant Gram-positive and Gram-negative bacterial strains. The bacteria used i...

Sepsis caused by gram-negative bacteria and that caused by gram-positive bacteria often manifest similar clinical features. We investigated plasma proinflammatory cytokine profiles in patients with sepsis due to gram-positive and gram-negative bacteria and studied the cytokine production and differential gene regulation of leukocytes stimulated ex vivo with Escherichia coli lipopolysaccharide o...

The hydrodistilled essential oils from Pistacia vera.L stem exudates have been tested against three bacteria (Escherichia coli, Staphylococcus aureus and Proteus spp) using three methods: agar disc diffusion, determination of MIC (minimum inhibitory concentration) and in the liquid phase by Maruzella method. The results obtained showed that essential oil resin of P. vera L. has antimicrobial ac...

The Stethoscope— A Vector of Infection? To the Editor: In the course of investigating a hospital-wide outbreak of methicillin resistant Staphylococcus aureus, 67 physicians' stethoscopes were cultured. Both the bell and the diaphragm were sampled with a sterile cotton swab, and this was immediately streaked onto Columbia Nutrient Agar (BBL), a selective medium for grampositive organisms. The ca...

Abstract Introduction: The aim of this study was to identify the antibacterial components in the ethanol extraction of Aloe vera against four clinically frequent pathogenic  bacteria. Materials and Methods: In this in-vitro study, Aloe vera extraction was prepared by dissolving 500 grams of the powder in 5L of 95% ethanol. The antibacterial activity of the extraction against Staphylococcus a...