Publications by authors named "K C Claeys"

Background: Diagnostic stewardship is a set of clinically based changes to the ordering, processing, and reporting of diagnostic tests designed to improve patient outcomes (through decreased inappropriate testing, and reduced patient harm from wrong, delayed, or missed diagnosis). It shares a common philosophy with laboratory stewardship but has some key differences.

Content: Laboratory stewardship focuses primarily on pre- and post-analytical components of the testing process.

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  • The effectiveness of ceftriaxone in determining susceptibility to newer oral cephalosporins is uncertain.
  • In a study of 409 bloodstream isolates of Enterobacterales, ceftriaxone susceptibility correlated with high rates of susceptibility to cefuroxime (89%), cefdinir (86%), cefpodoxime (90%), and cefixime (94%).
  • When focusing only on isolates that were susceptible to ceftriaxone, the susceptibility rates for the four oral cephalosporins increased to between 92% and 99%.
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Importance: Initiating effective therapy early is associated with improved survival among patients hospitalized with gram-negative bloodstream infections; furthermore, providing early phenotype-desirable antimicrobial therapy (PDAT; defined as receipt of a β-lactam antibiotic with the narrowest spectrum of activity to effectively treat the pathogen's phenotype) is crucial for antimicrobial stewardship. However, the timing of targeted therapy among patients hospitalized with gram-negative bloodstream infections is not well understood.

Objective: To compare the clinical outcomes between patients who were hospitalized with Enterobacterales bloodstream infections receiving early vs delayed PDAT.

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Background: Ceftolozane-tazobactam and ceftazidime-avibactam are preferred treatment options for multidrug-resistant Pseudomonas aeruginosa infections; however, real-world comparative effectiveness studies are scarce. Pharmacokinetic and pharmacodynamic differences between the agents might affect clinical response rates. We aimed to compare the effectiveness of ceftolozane-tazobactam and ceftazidime-avibactam for treatment of invasive multidrug-resistant P aeruginosa infections.

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  • - The PROPEL trial studied the effects of cipaglucosidase alfa plus miglustat (cipa+mig) versus alglucosidase alfa plus placebo (alg+pbo) on adults with late-onset Pompe disease (LOPD) over 52 weeks, finding improvements in motor and respiratory function for those switching to cipa+mig.
  • - Patient-reported outcomes (PROs) evaluated included various measures of physical function, fatigue, and overall quality of life, with statistical analyses comparing responses between the two treatment groups.
  • - Results showed that cipa+mig significantly improved patient-reported impressions of change in ability to move around and generally outperformed alg+pbo in most PRO measures, indicating enhanced
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