Search results for "Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry"

showing 3 items of 3 documents

Validation of a novel automatic deposition of bacteria and yeasts on MALDI target for MALDI-TOF MS-based identification using MALDI Colonyst robot

2017

Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) -based identification of bacteria and fungi significantly changed the diagnostic process in clinical microbiology. We describe here a novel technique for bacterial and yeast deposition on MALDI target using an automated workflow resulting in an increase of the microbes' score of MALDI identification. We also provide a comparison of four different sample preparation methods. In the first step of the study, 100 Gram-negative bacteria, 100 Gram-positive bacteria, 20 anaerobic bacteria and 20 yeasts were spotted on the MALDI target using manual deposition, semi-extraction, wet deposition onto 70% formic …

Atmospheric ScienceCarboxylic Acidslcsh:MedicineAnaerobic BacteriaResearch and Analysis MethodsMicrobiologyMass SpectrometryAnalytical ChemistryAutomationSpectrum Analysis TechniquesYeastsEnvironmental Chemistrylcsh:ScienceMatrix-Assisted Laser Desorption Ionization Time-of-Flight Mass SpectrometryGram Negative BacteriaBacteriaOrganic Compoundslcsh:REcology and Environmental SciencesGram Positive BacteriaFormic AcidOrganic ChemistryOrganismsFungiChemical CompoundsBiology and Life SciencesEukaryotaBacteriologyRoboticsYeastChemistryAtmospheric ChemistrySpectrometry Mass Matrix-Assisted Laser Desorption-IonizationPhysical SciencesEarth Scienceslcsh:QAcid DepositionAcidsResearch ArticlePLoS ONE
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Direct identification of microorganisms from thioglycolate broth by MALDI-TOF MS.

2017

We developed an easy MALDI-TOF MS-based assay to identify microorganisms directly from thioglycolate broth. A total of 101 positive thioglycolate broths inoculated with 15 different kinds of samples were evaluated. In 91 samples (90.1%), direct MALDI-TOF MS identifications were the same as those obtained after conventional laboratory procedures including subcultures. In 10 samples misidentified by direct processing, yeasts or mixed cultures grew in the thioglycolate subcultures, or high cellular debris hampered a correct analysis. This rapid method can provide a fast, clinically- relevant species-level identification without disturbing the daily workflow in clinical microbiology laboratorie…

0301 basic medicinePhysiologyMicroorganismlcsh:MedicinePathology and Laboratory MedicineNervous SystemMass SpectrometryAnalytical Chemistrychemistry.chemical_compoundSpectrum Analysis TechniquesMicrobial PhysiologyCandida albicansMedicine and Health SciencesMatrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometrylcsh:ScienceCerebrospinal FluidMultidisciplinaryChemistryMicrobial Growth and DevelopmentClinical Laboratory SciencesBody FluidsClinical microbiologyChemistryClinical LaboratoriesThioglycolatesPhysical SciencesAnaerobic bacteriaAnatomyCellular DebrisResearch ArticleClinical PathologyThioglycolate broth030106 microbiologyAnaerobic BacteriaResearch and Analysis MethodsMicrobiology03 medical and health sciencesSigns and SymptomsDiagnostic MedicineGram Negative BacteriaLaboratory methodsChromatographyBacteriaBacterial Growthlcsh:ROrganismsBiology and Life SciencesBacteriologyCulture MediaMatrix-assisted laser desorption/ionizationAbscessesClinical MicrobiologySpectrometry Mass Matrix-Assisted Laser Desorption-Ionizationlcsh:QLaboratoriesDevelopmental BiologyPLoS ONE
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Rapid antibiotic susceptibility testing on blood cultures using MALDI-TOF MS

2018

International audience; Antibiotic resistance is a major public health problem requiring the early optimization of antibiotic prescriptions. Matrix-Assisted Laser Desorption Ionization-Time Of Flight Mass Spectrometry (MALDI-TOF MS) has been shown to accurately identify bacteria from positive blood culture. Here, we developed a rapid detection of Escherichia coli resistance to amoxicillin (AMX) and cefotaxime (CTX) from positive blood culture based on MALDI-TOF MS. Potential sparing of broad-spectrum antibiotics was also evaluated. We tested 103 E. coli-positive blood cultures. Blood cultures were subculture 1-hour in antibiotic-free rich liquid media before further incubation with and with…

Agar Dilution Method0301 basic medicineTime FactorsCefotaximePhysiologyAntibioticslcsh:MedicineCefotaximeDrug resistancemedicine.disease_causeMass SpectrometryAnalytical ChemistrySpectrum Analysis TechniquesAntibioticsMicrobial PhysiologyMedicine and Health SciencesBlood cultureMatrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometrylcsh:ScienceMultidisciplinarymedicine.diagnostic_testbiologyAntimicrobialsChemistryMicrobial Growth and DevelopmentDrugsMatrix-Assisted Laser Desorption Ionization Mass SpectrometryBody FluidsAnti-Bacterial Agents3. Good healthChemistryBlood[SDV.MP]Life Sciences [q-bio]/Microbiology and ParasitologyPhysical SciencesAnatomyResearch Articlemedicine.drugmedicine.drug_class030106 microbiologyMicrobial Sensitivity TestsResearch and Analysis MethodsMicrobiologyAntibiotic Susceptibility TestingMicrobiology03 medical and health sciencesMicrobial ControlDrug Resistance BacterialEscherichia colimedicineHumansEscherichia coliPharmacologyBacteriological TechniquesBacterial Growthlcsh:RBiology and Life SciencesAmoxicillinAmoxicillinbiology.organism_classificationPharmacologic AnalysisBlood CultureAntibiotic ResistanceSpectrometry Mass Matrix-Assisted Laser Desorption-Ionizationlcsh:QAntimicrobial ResistanceSubculture (biology)BacteriaDevelopmental BiologyPLOS ONE
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