Susceptibility of Staphylococcus aureus isolates to vancomycin at a university hospital in southern Brazil

Lutz, Larissa; Barth, Afonso Luís

doi:10.1590/s1517-83822006000300009

Cited by 8 publications

(6 citation statements)

References 13 publications

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“…It is also responsible for nosocomial infections (10). Some of the life-threatening diseases produced by S. aureus include bacteremia, pneumonia, osteomyelitis, endocarditis, empyema, sepsis, scalded-skin syndrome, and toxic shock syndrome (11).…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Silver Nanoparticles and Their Combination with Zataria multiflora Essential Oil and Methanol Extract

Sheikholeslami

Mousavi

Ashtiani

et al. 2016

Jundishapur J Microbiol

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BackgroundAgainst a variety of antimicrobial resistant pathogens, the scientists attempted substitution of antimicrobial medicine with various nanoparticles and plant-based antibacterial substances.ObjectivesThe aim of this study was to assess the antibacterial effects of silver nanoparticles solely and in combination with Zataria multiflora essential oil and methanolic extract on some photogenic bacteria.MethodsMinimum inhibitory concentrations (MICs) and fractional inhibitory concentrations (FICs) of plant essential oil, methanolic extract, and silver nanoparticles against bacteria were evaluated using the broth microdilution method and check board microtiter assays.ResultsThe results of the experiment showed that the MIC and minimal bacterial concentration (MBC) values of Ag-NPs against all strains were in the range of 15.625 - 500 µg/mL, and values for the essential oil and plant extract were in the range of 1.56 - 100 mg/mL.ConclusionsSilver nanoparticles were observed to have additive effects with essential oil against Staphylococcus epidermidis and S. aureus. The obtained results suggest the need for further investigations of the antibacterial effects of the combination of silver nanoparticles with other plant extracts and essential oils.

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Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Silver Nanoparticles and Their Combination with Zataria multiflora Essential Oil and Methanol Extract

Sheikholeslami

Mousavi

Ashtiani

et al. 2016

Jundishapur J Microbiol

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“…resistance, especially to beta-lactam drugs such as oxacillin (4,26 (10) and to trace and identify the transmission source. The RW3A primer is a repetitive sequence that permits the genetic distinction of phenotypically equivalent strains of S. aureus (35).…”

Section: S Aureus Is Highly Versatile In Acquiring Antimicrobialmentioning

confidence: 99%

Carriage frequency, phenotypic and genotypic characteristics of Staphylococcus aureus isolated from dialysis and kidney tranplant patients at a hosptial in northern Paraná

Giarola¹,

Santos²,

Tognim³

et al. 2012

Braz. J. Microbiol.

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The objective of the present study was to determine the frequency of Staphylococcus aureus nasal carriage among dialysis and kidney transplant patients, to identify the antimicrobial resistance profile of these strains and to verify their genetic profiles with the RW3A primer. The study included 159 individuals, comprising 111 dialysis and 48 kidney transplant patients. Of the 48 transplant patients, 75% were positive for S.aureus, whereas 49% of the 111 dialysis patients were carriers. Two samples yielded conflicting results for oxacillin sensitivity between the disk diffusion and minimum inhibitory concentration (MIC) assays: both were sensitive by the disk diffusion assay and resistant by MIC (4 μg/ml). In the antibiogram by disk diffusion, ten samples were resistant to cefoxitin, among which eight were also resistant to oxacillin. The resistance of the ten samples to cefoxitin by the disk diffusion assay was confirmed by MIC. Of the ten oxacillin-resistant samples, eight harbored the mecA gene. All samples were sensitive to vancomycin, and most were resistant to penicillin and demonstrated high rates of resistance to the other antimicrobials tested.The samples from dialysis patients exhibited a more homogenous genetic profile. Among the samples with a high percent similarity, no correlation with sensitivity or resistance to oxacillin was observed. According to the results of this study, the implementation of prevention and control measures, such as increased restrictions on prescriptions for antimicrobial drugs and nasal decontamination prior to high-risk procedures, is recommended.

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“…Staphylococcus aureus is a microorganism that is a common etiology of hospital infections (20,24). S. aureus primarily residues on the mucous membranes of the human nasopharynx, as well as on human and animal skin (15,29).…”

Section: Introductionmentioning

confidence: 99%

“…Multi-drug resistant strain of S. aureus example, nasoenteral feeding tubes are a primary risk factor for the spread of microorganisms that are resistant to multiple drugs, such as methicillin-or vancomycin-resistant S. aureus (13,20,22,23). Antibiotic-resistant bacteria that have adhered to these devices can be transferred to other devices, causing the infection to spread rapidly among patients (23).…”

Section: Introductionmentioning

confidence: 99%

The hydrophobicity and roughness of a nasoenteral tube surface influences the adhesion of a multi-drug resistant strain of Staphylococcus Aureus

Lima¹,

Andrade²,

Soares³

et al. 2011

Braz. J. Microbiol.

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In this study, we examined the physiochemical properties of nasoenteral feeding tubes made from two different types of polymer: silicone materials and polyurethane. The internal surfaces of the nasoenteral feeding tubes were analyzed for their hydrophobicity, roughness, microtopography, rupture-tension and ability to stretch. We also studied the adhesion of an isolated, multi-drug resistant strain of S. aureus to these polymers. The polyurethane nasoenteral tube, which was classified as hydrophilic, was more resistant to rupture-tension and stretching tests than the silicone tube, which was classified as hydrophobic.Additionally, the polyurethane tube had a rougher surface than the silicone tube. Approximately 1.0 log CFU.cm -2 of S. aureus cells adhered to the tubes and this number was not statistically different between the two types of surfaces (p > 0.05). In future studies, new polymers for nasoenteral feeding tubes should be tested for their ability to support bacterial growth. Bacterial adhesion to these polymers can easily be reduced through modification of the polymer's physicochemical surface characteristics.

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Susceptibility of Staphylococcus aureus isolates to vancomycin at a university hospital in southern Brazil

Cited by 8 publications

References 13 publications

Antibacterial Activity of Silver Nanoparticles and Their Combination with Zataria multiflora Essential Oil and Methanol Extract

Antibacterial Activity of Silver Nanoparticles and Their Combination with Zataria multiflora Essential Oil and Methanol Extract

Carriage frequency, phenotypic and genotypic characteristics of Staphylococcus aureus isolated from dialysis and kidney tranplant patients at a hosptial in northern Paraná

The hydrophobicity and roughness of a nasoenteral tube surface influences the adhesion of a multi-drug resistant strain of Staphylococcus Aureus

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