Simon W. Lam

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With the maturation of next-generation DNA sequencing (NGS) technologies, the throughput of DNA sequencing reads has soared to over 600 gigabases from a single instrument run. General purpose computing on graphics processing units (GPGPU), extracts the computing power from hundreds of parallel stream processors within graphics processing cores and provides(More)
BACKGROUND Colistin is increasingly used for the treatment of multidrug-resistant gram-negative infections. However, colistin dosing varies greatly and the optimal regimen is unknown. The purpose of this study was to determine if colistin dosing correlates with patient outcomes. METHODS This retrospective study included patients with gram-negative(More)
Reference broth microdilution methods of Candida echinocandin susceptibility testing are limited by interlaboratory variability in caspofungin MICs. Recently revised Clinical and Laboratory Standards Institute (CLSI) breakpoint MICs for echinocandin nonsusceptibility may not be valid for commercial tests employed in hospital laboratories. Indeed, there are(More)
PURPOSE Studies showing corticosteroids decrease time to shock reversal in septic shock did not include arginine vasopressin, which also may reduce the duration of catecholamine therapy. Thus, the effect of corticosteroids on vasopressin-containing vasopressor regimens is unknown. We designed this study to evaluate the effect of corticosteroids on time to(More)
BACKGROUND The recommended treatment for severe Clostridium difficile infection (CDI) is oral vancomycin alone. Combination therapy with metronidazole is only recommended in cases complicated by shock, ileus, or toxic megacolon. However, patients with severe infection are often treated with combination therapy despite a lack of data supporting this(More)
BACKGROUND Invasive candidiasis (IC) is associated with significant morbidity and mortality in critically ill patients. This, in conjunction with difficulties in diagnosis, underscores the need for novel treatment strategies based on the identification of significant risk factors for IC. OBJECTIVE To review the evidence surrounding the use of early(More)
We performed a retrospective analysis of the time to initiation of appropriate antifungal therapy for candidemia and in-hospital mortality. The definition of appropriate antifungal therapy was based on in vitro susceptibility results, and in the case of fluconazole, pharmacodynamic parameters. Of 123 patients, the mortality rate in the <24 h, 24-48 h, and(More)
Limited data are available on intraventricular vancomycin dosing for meningitis. This study explored clinical characteristics that correlated with cerebrospinal fluid (CSF) concentrations. Over a nine-year period, 13 patients with 34 CSF vancomycin concentrations were evaluated. CSF output and time from dose correlated with CSF vancomycin concentration. No(More)
OBJECTIVES We studied whether fluconazole or echinocandin treatment of Candida glabrata fungaemia results in superior outcomes. METHODS A multicentre, retrospective study was performed with 224 adult patients who received ≥ 5 days of therapy with either fluconazole or an echinocandin as their first antifungal treatment after collection of a blood culture(More)
To examine the occurrence of feed intolerance in critically ill patients with previously diagnosed type II diabetes mellitus (DM) who received prolonged gastric feeding. Retrospective study in a level 3 mixed ICU. All mechanically ventilated, enterally fed patients (n = 649), with (n = 118) and without type II DM (n = 531) admitted between January 2003 and(More)