Staphylococcus aureus is a major nosocomial pathogen that causes severe morbidity and mortality in many hospitals worldwide. Besides, the incidence of S. aureus bacteremia has significantly increased over the past decades. The aims of this study were to detect the risk factors for methicillin resistance and mortality and to evaluate vancomycin susceptibility in methicillin-resistant isolates. Thus, 39 S. aureus isolates from blood cultures of hospitalized patients with bacteremia were studied in Nueva Clínica Chacabuco Tandil, Buenos Aires, Argentina during 01/2006-12/2008. The overall mortality was 51.3%, which was significantly associated with methicillin resistance (OR: 4.20, IC95%: 1.08-16.32, p: 0.05), even though it was not an independent mortality predictor as it was the mechanical ventilation (OR: 15.99, IC95%: 3.24 - 78.86). Previous surgery (OR: 17.23, IC95%: 1.80-164.60) and hospitalization in intensive care units (OR: 21.12, IC95%: 2.33-191.30) were independent predictors of meticillin-resistance. No isolates were found with reduced vancomycin susceptibility. All the studied isolates were in vitro susceptible to vancomycin with a MIC50 and MIC90 of 0.5 μg/ml.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1590/S0325-75412010000400007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Chloramphenicol glycoside derivative: A way to overcome its antimicrobial resistance and toxicity.
Carbohydr Res
January 2025
Faculty of Chemistry, University of Wrocław, Wrocław, 50-383, Poland.
Triggered by the urgent need to tackle the global crisis of multidrug-resistant bacterial infections, in this work, we present a way to overcome chloramphenicol resistance by introducing modifications based on the glycosylation of its hydroxyl groups. The synthesized derivatives demonstrate complete resistance to the action of recombinant chloramphenicol acetyltransferase (CAT) from Escherichia coli and efficacy against methicillin-resistant Staphylococcus aureus (MRSA), Escherichia coli ESBL, and Pseudomonas aeruginosa ATCC 27853. Glycosylation gives chloramphenicol an additional advantage - the stable glycosidic form is less toxic to human dermal fibroblasts and has significantly better water solubility than non-glycosylated chloramphenicol.
View Article and Find Full Text PDFAntibiotic Resistance of Strains-Searching for New Antimicrobial Agents-Review.
Pharmaceuticals (Basel)
January 2025
MML Medical Centre, Bagno 2, 00-112 Warsaw, Poland.
Inappropriate and excessive use of antibiotics is responsible for the rapid development of antimicrobial resistance, which is associated with increased patient morbidity and mortality. There is an urgent need to explore new antibiotics or alternative antimicrobial agents. a commensal microorganism but is also responsible for numerous infections.
View Article and Find Full Text PDFThe Changes in the Antibiotic Resistance of , , and in the Clinical Isolates of a Multiprofile Hospital over 6 Years (2017-2022).
J Clin Med
January 2025
Department of Medical Biology, Faculty of Nursing and Midwifery, Wroclaw Medical University, 50-368 Wroclaw, Poland.
The growing resistance of bacteria to antibiotics is a serious problem in health care. The present study aims to assess the drug resistance of , , and isolated from infections in a multispecialty hospital over a 6-year period. Identification and antimicrobial susceptibility testing were performed using the VITEK2 automated system (Biomerieux).
View Article and Find Full Text PDFDiscovery of Quinazolone Pyridiniums as Potential Broad-Spectrum Antibacterial Agents.
Molecules
January 2025
Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
The overprescription of antibiotics in medicine and agriculture has accelerated the development and spread of antibiotic resistance in bacteria, which severely limits the arsenal available to clinicians for treating bacterial infections. This work discovered a new class of heteroarylcyanovinyl quinazolones and quinazolone pyridiniums to surmount the increasingly severe bacterial resistance. Bioactive assays manifested that the highly active compound exhibited strong inhibition against MRSA and with extremely low MICs of 0.
View Article and Find Full Text PDFIn Silico Exploration of Staphylococcal Cassette Chromosome (SCC) Evolution Based on Phylogenetic Relationship of .
Microorganisms
January 2025
College of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
As the mobile cassette carrier of the methicillin resistance gene that is transported across staphylococci species, the evolution and origin of Staphylococcal Cassette Chromosome (SCC)-and in particular, the composition of and SCC-have been extensively discussed in the scientific literature; however, information regarding its dissemination across geographical limits and evolution over decades remains limited. In addition, whole-genome sequencing-based macro-analysis was unable to provide sufficiently detailed evolutionary information on SCC. Herein, the cassette chromosome recombinase genes , as essential components of SCC, were employed to explore the evolution of SCC.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!