2014
ESBL-producing Escherichia coli and Klebsiella pneumoniae at a tertiary care hospital in Saudi Arabia.
Somily AM, Habib HA, Absar MM, Arshad MZ, Manneh K, Al Subaie SS, Al Hedaithy MA, Sayyed SB, Shakoor Z, Murray TS. ESBL-producing Escherichia coli and Klebsiella pneumoniae at a tertiary care hospital in Saudi Arabia. The Journal Of Infection In Developing Countries 2014, 8: 1129-36. PMID: 25212077, DOI: 10.3855/jidc.4292.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAged, 80 and overAnti-Bacterial AgentsBeta-LactamasesBeta-LactamsChildChild, PreschoolEscherichia coliEscherichia coli InfectionsFemaleHumansInfantKlebsiella InfectionsKlebsiella pneumoniaeMaleMicrobial Sensitivity TestsMiddle AgedProspective StudiesSaudi ArabiaTertiary Care CentersYoung AdultConceptsTertiary care hospitalK. pneumoniaeCare hospitalStudy periodClavulanic acidKing Khalid University HospitalDeep wound swabsFrequency of ESBLK. pneumoniae isolatesESBL-producing E. coliExtended-spectrum β-lactamasesSterile body fluidsAnti-microbial susceptibilityESBL-producing isolatesOverall frequency rateE. coli resistanceESBL E. coliWound swabsUniversity HospitalEtest stripsPneumoniae isolatesBlood samplesSuperficial swabsAntibiotic susceptibilityFrequency rate
2013
Rapid detection of carbapenemase activity through monitoring ertapenem hydrolysis in Enterobacteriaceae with LCMS/MS
Peaper DR, Kulkarni MV, Tichy AN, Jarvis M, Murray TS, Hodsdon ME. Rapid detection of carbapenemase activity through monitoring ertapenem hydrolysis in Enterobacteriaceae with LCMS/MS. Bioanalysis 2013, 5: 147-157. PMID: 23330558, PMCID: PMC5753620, DOI: 10.4155/bio.12.310.Peer-Reviewed Original ResearchConceptsLife-threatening infectionsIll patientsGram-negative rodsDiagnostic testsExpression of carbapenemasesAvailable diagnostic testsRapid diagnostic testsRatios of metabolitesLC-MS/MSCarbapenemase activityHodge testCarbapenem resistanceCarbapenemase productionCarbapenem antibioticsΒ-lactam antibioticsThreshold cutoffDA increaseErtapenem hydrolysisLC-MS/MS methodPatientsClinical laboratoriesAntibioticsLCMS/MSInfectionPhysiological levels
2009
Pseudomonas aeruginosa OspR is an oxidative stress sensing regulator that affects pigment production, antibiotic resistance and dissemination during infection
Lan L, Murray TS, Kazmierczak BI, He C. Pseudomonas aeruginosa OspR is an oxidative stress sensing regulator that affects pigment production, antibiotic resistance and dissemination during infection. Molecular Microbiology 2009, 75: 76-91. PMID: 19943895, PMCID: PMC2881571, DOI: 10.1111/j.1365-2958.2009.06955.x.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SubstitutionAnimalsAnti-Bacterial AgentsBeta-Lactam ResistanceBeta-LactamsFemaleGene DeletionGene Expression Regulation, BacterialGlutathione PeroxidaseHydrogen PeroxideMiceMice, Inbred C57BLModels, BiologicalMutagenesis, Site-DirectedOxidative StressPigments, BiologicalPneumoniaPseudomonas aeruginosaPseudomonas InfectionsQuorum SensingRepressor ProteinsSignal TransductionStress, PhysiologicalTyrosineVirulenceConceptsOxidative stress sensingCys-24Stress sensingPigment productionNull mutant strainOxidative stressSerine substitution mutantsGlobal regulatorPromoter DNASubstitution mutantsAdditional genesInside hostsQuorum sensingCys residuesMutant strainConstitutive expressionMultiple pathwaysRegulatory effectsBeta-lactam resistanceGenesSignificant inductionRegulatorTyrosine metabolismOSPRP. aeruginosa