Objectives: Recent studies have shown that methicillin-resistantStaphylococcus aureus (MRSA) bacteraemia with vancomycin minimum inhibitory concentration (MIC) >1 μg/mL is associated with a higher rate of treatment failure and a higher mortality rate. Daptomycin is an alternative to vancomycin but has not been as well studied. The aim of this literature review was to evaluate the effect of daptomycin MIC on the outcomes of S. aureus bacteraemia.
Methods: We conducted a literature search for the period January 2010 to January 2019 using the MEDLINE and Embase databases.
Results: Four studies were included in the review. The outcomes were clinical cure and 30- or 60-day mortality. In two retrospective studies, 60-70% ofS. aureus isolates had a low daptomycin MIC (≤0.5 μg/mL) and patients with MRSA bacteraemia who were treated with daptomycin had a lower mortality rate. In another study, patients with methicillin-susceptible S. aureus bacteraemia with low daptomycin MICs had a lower risk of developing septic thrombophlebitis. One study showed that patients with MRSA bacteraemia had a higher mortality rate if the daptomycin MIC was >0.5 μg/mL.
Conclusion: The included studies in this review suggest a possible association between high daptomycin MIC and unfavourable clinical outcomes ofS. aureus bacteraemia. Further prospective studies are required to evaluate the impact of the daptomycin MIC on the clinical outcomes of S. aureus bacteraemia.
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http://dx.doi.org/10.1016/j.jgar.2020.11.015 | DOI Listing |
Antimicrob Agents Chemother
January 2025
JMI Laboratories, Element Materials Technology, North Liberty, Iowa, USA.
Ceftobiprole was recently approved by the United States (US) Food and Drug Administration (FDA) for the treatment of adult patients with bacteremia, including right-side endocarditis, acute bacterial skin and skin structure infections, and community-acquired bacterial pneumonia in adults and pediatrics. Ceftobiprole is an advanced-generation cephalosporin approved in many countries for the treatment of adults with community-acquired pneumonia and hospital-acquired pneumonia, excluding ventilator-associated pneumonia. We evaluated the activities of ceftobiprole and comparators against methicillin-resistant (MRSA) and multidrug-resistant (MDR) clinical isolates.
View Article and Find Full Text PDFTher Adv Infect Dis
January 2025
Clinica di Malattie Infettive, Fondazione IRCCS Policlinico San Matteo, Pavia 27100, Italy.
Background: Daptomycin pharmacokinetics and pharmacodynamics data relative to higher doses in patients are necessary for clinical practice.
Objectives: A monocentric, prospective study that enrolled patients with a diagnosis of spp. infective endocarditis treated with daptomycin according to clinical practice, to evaluate the pharmacokinetics/pharmacodynamics of different daptomycin daily doses (group A: 8-10 and group B: 11-12 mg/kg).
J Antimicrob Chemother
December 2024
Division of Infection Disease, The Lundquist Institute at Harbor-UCLA Medical Center, Torrance, CA, USA.
Background: Methicillin-resistant Staphylococcus aureus (MRSA) are resistant to nearly all β-lactam antibiotics under standard testing conditions. However, a novel phenotype exists wherein certain MRSA strains exhibit β-lactam susceptibility in the presence of bicarbonate (termed 'NaHCO3-responsive'), an abundant ion in mammalian tissues and blood. This suggests that specific MRSA infections may be treatable by β-lactams.
View Article and Find Full Text PDFCommun Dis Intell (2018)
December 2024
School of Medical, Molecular and Forensic Sciences, Murdoch University, Murdoch, Western Australia, Australia.
From 1 January to 31 December 2023, fifty-seven institutions across Australia participated in the Australian Surveillance Outcome Program (ASSOP). The aim of ASSOP 2023 was to determine the proportion of bacteraemia (SAB) isolates in Australia that were antimicrobial resistant, with particular emphasis on methicillin resistance, and to characterise the methicillin-resistant (MRSA) molecular epidemiology. A total of 3,422 SAB episodes were reported, of which 77.
View Article and Find Full Text PDFMicrobiologyopen
December 2024
Department of Life Sciences (DLS), Aberystwyth University, Aberystwyth, UK.
Antimicrobial resistance remains a global issue, hindering the control of bacterial infections. This study examined the antimicrobial properties of 2,3-N,N-diphenyl quinoxaline derivatives against Gram-positive, Gram-negative, and Mycobacterium species. Two quinoxaline derivatives (compounds 25 and 31) exhibited significant activity against most strains of Staphylococcus aureus, Enterococcus faecium, and Enterococcus faecalis tested, with MIC values ranging from 0.
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