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The bioMérieux BIOFIRE Joint Infection (JI) Panel is a multiplex in vitro diagnostic test for the simultaneous and rapid (~1 h) detection of 39 potential pathogens and antimicrobial resistance (AMR) genes directly from synovial fluid (SF) samples. Thirty-one species or groups of microorganisms are included in the kit, as well as several AMR genes. This study, performed to evaluate the BIOFIRE JI Panel for regulatory clearance, provides data from a multicenter evaluation of 1,544 prospectively collected residual SF samples with performance compared to standard-of-care (SOC) culture for organisms or polymerase chain reaction (PCR) and sequencing for AMR genes. The BIOFIRE JI Panel demonstrated a sensitivity of 90.9% or greater for all but six organisms and a positive percent agreement (PPA) of 100% for all AMR genes. The BIOFIRE JI Panel demonstrated a specificity of 98.5% or greater for detection of all organisms and a negative percent agreement (NPA) of 95.7% or greater for all AMR genes. The BIOFIRE JI Panel provides an improvement over SOC culture, with a substantially shorter time to result for both organisms and AMR genes with excellent sensitivity/PPA and specificity/NPA, and is anticipated to provide timely and actionable diagnostic information for joint infections in a variety of clinical scenarios., Competing Interests: J.E. has received research funding from bioMérieux and has served as a consultant for bioMérieux. AL has received research funding from BioFire, Cepheid, and Luminex. J.M.B.L. has served as a consultant for bioMérieux and has also participated in other BioFire clinical studies. B.S. has received research funding from BioFire, Becton, Dickinson and Company, and DiaSorin.

The rapid pace of name changes of medically important fungi is creating challenges for clinical laboratories and clinicians involved in patient care. We describe two sources of name change which have different drivers, at the species versus the genus level. Some suggestions are made here to reduce the number of name changes. We urge taxonomists to provide diagnostic markers of taxonomic novelties. Given the instability of phylogenetic trees due to variable taxon sampling, we advocate to maintain genera at the largest possible size. Reporting of identified species in complexes or series should where possible comprise both the name of the overarching species and that of the molecular sibling, often cryptic species. Because the use of different names for the same species will be unavoidable for many years to come, an open access online database of the names of all medically important fungi, with proper nomenclatural designation and synonymy, is essential. We further recommend that while taxonomic discovery continues, the adaptation of new name changes by clinical laboratories and clinicians be reviewed routinely by a standing committee for validation and stability over time, with reference to an open access database, wherein reasons for changes are listed in a transparent way., Competing Interests: The authors declare no conflict of interest.

Objective: To determine the associated costs related to the diagnosis and treatment of meningitis and encephalitis (ME) in adult patients in the USA., Methods: A retrospective observational study design was used to assess the use and costs of diagnostic tests and antimicrobial treatment and the total hospitalization costs for adult patients with suspected ME, who received a lumbar puncture procedure during an emergency department visit or during the first two service days of an inpatient stay. Related costs were calculated by timing of lumbar puncture performed and infectious etiology., Results: A total 26429 adult patients with suspected ME diagnosed between 2011 and 2014 were included in the study. The mean hospitalization cost was $15 572±27168, with antimicrobial medication cost of $1144±4052 and laboratory test cost of $210±244. The total visit cost increased with delayed lumbar puncture procedure, intensive care unit stay, and if the etiology was fungi, arbovirus, or bacteria., Conclusions: Higher diagnostic and treatment costs are associated with a delayed lumbar puncture procedure, the etiological agent, and the requirement for an intensive care unit stay., (Copyright © 2018 BioMerieux, Inc. Published by Elsevier Ltd.. All rights reserved.)