scholarly journals Systematic Comparison of Four Methods for Detection of Carbapenemase-Producing Enterobacterales Directly from Blood Cultures

2019 ◽  
Vol 57 (11) ◽  
Author(s):  
Maria Meier ◽  
Axel Hamprecht
Keyword(s):  
Rapid Detection ◽  
Clinical Microbiology ◽  
Bloodstream Infections ◽  
Blood Cultures ◽  
Patient Treatment ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory ◽  
Study Protocols ◽  
Sensitivity Specificity ◽  
Good Detection

ABSTRACT Early identification of infections caused by carbapenemase-producing Enterobacterales (CPE) can help to optimize patient treatment and improve outcome. In this study, protocols for rapid detection of carbapenemase production directly from positive blood cultures were developed applying a concentration and hemolysis step before a test for carbapenemase production was performed. Four different methods (three modified colorimetric assays [β-Carba, bcCarba NP, and NeoRapid Carb] and a variation of the carbapenem inactivation method [CIM] test with blood cultures [bcCIM]) were assessed on blood cultures spiked with 185 different molecularly characterized Enterobacterales isolates. The challenge collection included 81 carbapenemase-negative isolates and 104 CPEs (OXA-48 [n = 25], NDM [n = 20], KPC [n = 18], VIM [n = 25], GIM [n = 5], OXA-48-like [n = 9], and OXA-48-like plus NDM [n = 2]). The sensitivity/specificity was 99.0%/95.1% for bcCarba NP, 99.0%/91.4% for NeoRapid Carb, 100%/95.1% for β-Carba and 100%/100% for bcCIM. Weakly hydrolyzing carbapenemases (e.g., OXA-48-like) were also well detected by the assays. The time to result was 20 to 45 min for β-Carba, 2 to 3 h for bcCarba NP, 2.5 to 2 h for NeoRapid Carb, and 18 to 24 h for bcCIM. In conclusion, all assays demonstrated good detection of CPE. The protocols can be easily implemented in any clinical microbiology laboratory and could help to optimize therapy early in bloodstream infections by CPE.

scholarly journals Diagnosis of Bloodstream Infections in Children

2016 ◽  
Vol 54 (6) ◽  
pp. 1418-1424 ◽  
Author(s):  
Jennifer Dien Bard ◽  
Erin McElvania TeKippe
Keyword(s):  
Blood Culture ◽  
Clinical Microbiology ◽  
Bloodstream Infections ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory ◽  
Diagnostic Approaches ◽  
Pediatric Populations ◽  
Culture Specimen

Identification of bloodstream infections is among the most critical tasks performed by the clinical microbiology laboratory. While the criteria for achieving an adequate blood culture specimen in adults have been well described, there is much more ambiguity in pediatric populations. This minireview focuses on the available pediatric literature pertaining to the collection of an optimal blood culture specimen, including timing, volume, and bottle selection, as well as rapid diagnostic approaches and their role in the management of pediatric bloodstream infections.

scholarly journals Prospective Assessment of Blood Cultures Which Were Sent to the Clinical Microbiology Laboratory

2020 ◽  
Vol 31 (2) ◽  
pp. 120-124
Author(s):  
Sibel Bolukcu ◽  
◽  
Seniha Basaran ◽  
Atahan Cagatay ◽  
Halit Ozsut ◽  
...  
Keyword(s):  
Clinical Microbiology ◽  
Blood Cultures ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory ◽  
Prospective Assessment

scholarly journals Decrease in Enteroviral Meningitis - An Unexpected Benefit of COVID-19 Mitigation?

2020 ◽  
Author(s):  
Kami D Kies ◽  
Amber S Thomas ◽  
Matthew J Binnicker ◽  
Kelli L Bashynski ◽  
Robin Patel
Keyword(s):  
Cerebrospinal Fluid ◽  
Laboratory Testing ◽  
Clinical Microbiology ◽  
Late Summer ◽  
Mitigation Strategies ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory ◽  
Testing Data ◽  
Early Fall ◽  
Enteroviral Meningitis

Abstract Enteroviral meningitis is seasonal, typically exhibiting a rise in prevalence in late summer/early fall. Based on clinical microbiology laboratory testing data of cerebrospinal fluid, the expected August/September/October peak in enteroviral meningitis did not occur in 2020, possibly related to COVID-19 mitigation strategies.

scholarly journals Implementation and evaluation of a novel real-time multiplex assay for SARS-CoV-2: in-field learnings from a clinical microbiology laboratory

Pathology ◽  
2020 ◽  
Vol 52 (7) ◽  
pp. 754-759 ◽  
Author(s):  
Eloise Williams ◽  
Katherine Bond ◽  
Brian Chong ◽  
Dawn Giltrap ◽  
Malcolm Eaton ◽  
...  
Keyword(s):  
Real Time ◽  
Clinical Microbiology ◽  
Multiplex Assay ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory

scholarly journals One Small Step for the Gram Stain, One Giant Leap for Clinical Microbiology

2016 ◽  
Vol 54 (6) ◽  
pp. 1416-1417 ◽  
Author(s):  
Richard B. Thomson
Keyword(s):  
Clinical Microbiology ◽  
Rapid Test ◽  
Error Rates ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory ◽  
Gram Stain ◽  
Small Step ◽  
Link Type ◽  
Giant Leap

The Gram stain is one of the most commonly performed tests in the clinical microbiology laboratory, yet it is poorly controlled and lacks standardization. It was once the best rapid test in microbiology, but it is no longer trusted by many clinicians. The publication by Samuel et al. (J. Clin. Microbiol. 54:1442–1447, 2016,http://dx.doi.org/10.1128/JCM.03066-15) is a start for those who want to evaluate and improve Gram stain performance. In an age of emerging rapid molecular results, is the Gram stain still relevant? How should clinical microbiologists respond to the call to reduce Gram stain error rates?

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