Christopher D. Pfeiffer

Learn More
BACKGROUND Fluconazole (FLC) resistance is common in C. glabrata and echinocandins are often used as first-line therapy. Resistance to echinocandin therapy has been associated with FKS1 and FKS2 gene alterations. METHODS We reviewed records of all patients with C. glabrata bloodstream infection at Duke Hospital over the past decade (2001-2010) and(More)
BACKGROUND A double-sandwich enzyme-linked immunosorbent galactomannan assay has been approved for surveillance for invasive aspergillosis in immunocompromised patients. We undertook a meta-analysis to assess the accuracy of a galactomannan assay for diagnosing invasive aspergillosis. METHODS Studies of the galactomannan assay that used the European(More)
BACKGROUND Invasive candidiasis (IC) is a devastating disease. While prompt antifungal therapy improves outcomes, empiric treatment based on the presence of fever has little clinical impact. Β-D-Glucan (BDG) is a fungal cell wall component detectable in the serum of patients with early invasive fungal infection (IFI). We evaluated the utility of BDG(More)
For Candida species, a bimodal wild-type MIC distribution for echinocandins exists, but resistance to echinocandins is rare. We characterized isolates from patients with invasive candidiasis (IC) breaking through >or=3 doses of micafungin therapy during the first 28 months of its use at our center: MICs were determined and hot-spot regions within FKS genes(More)
One potential limitation of DNA-based molecular diagnostic tests for Candida bloodstream infection (BSI) is organism burden, which is not sufficiently characterized. We hypothesized that the number of CFU per milliliter (CFU/ml) present in an episode of Candida BSI is too low for reliable DNA-based diagnostics. In this study, we determined Candida burden in(More)
BACKGROUND There is a paucity of clinical trials informing specific questions faced by infectious diseases (ID) specialists. The ClinicalTrials.gov registry offers an opportunity to evaluate the ID clinical trials portfolio. METHODS We examined 40,970 interventional trials registered with ClinicalTrials.gov from 2007-2010, focusing on study conditions and(More)
A rapid liquid chromatographic procedure has been validated for the determination of salicylic acid, salsalate, acetylsalicylsalicylic acid, and acetylsalicylic anhydride in aspirin. Samples are dissolved in methylene chloride and analyzed directly by adsorption chromatography in a 7-min separation using an isocratic mobile phase. Recoveries averaged 99%(More)
BACKGROUND The proportion of clinical research sponsored by industry will likely continue to expand as federal funds for academic research decreases, particularly in the fields of HIV/AIDS and hepatitis C (HCV). While HIV and HCV continue to burden the US population, insufficient data exists as to how industry sponsorship affects clinical trials involving(More)
Mycobacterium immunogenum is a relatively new species within the Mycobacterium chelonae-Mycobacterium abscessus group of rapidly growing mycobacteria (RGM). M. immunogenum was first characterized in 2001 and, similar to other RGM, is an ubiquitous environmental organism. This organism has most commonly been implicated in cutaneous infection in both healthy(More)
OBJECTIVE To characterize epidemiologic, clinical, and laboratory features of babesiosis occurring in Wisconsin residents. DESIGN Conduct a review of all cases of babesiosis reported to the Wisconsin Division of Public Health with onsets during 1996-2005. For case patients with onsets during 2004, pertinent medical records were reviewed and patient(More)