2018
Changes in IgA Protease Expression Are Conferred by Changes in Genomes during Persistent Infection by Nontypeable Haemophilus influenzae in Chronic Obstructive Pulmonary Disease
Gallo MC, Kirkham C, Eng S, Bebawee RS, Kong Y, Pettigrew MM, Tettelin H, Murphy TF. Changes in IgA Protease Expression Are Conferred by Changes in Genomes during Persistent Infection by Nontypeable Haemophilus influenzae in Chronic Obstructive Pulmonary Disease. Infection And Immunity 2018, 86: 10.1128/iai.00313-18. PMID: 29760213, PMCID: PMC6056860, DOI: 10.1128/iai.00313-18.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseObstructive pulmonary diseasePersistent infectionPulmonary diseaseIgA proteaseProtease expressionNontypeable Haemophilus influenzaeAcute exacerbationLower airwaysRespiratory tractNTHi strainsHaemophilus influenzaeInfectionNTHiNatural infectionHuman pathobiontAltered expressionPatientsDiseasePersistent strainsExpressionCritical roleExacerbationAirwayInitial acquisitionHaemophilus influenzae genome evolution during persistence in the human airways in chronic obstructive pulmonary disease
Pettigrew MM, Ahearn CP, Gent JF, Kong Y, Gallo MC, Munro JB, D’Mello A, Sethi S, Tettelin H, Murphy TF. Haemophilus influenzae genome evolution during persistence in the human airways in chronic obstructive pulmonary disease. Proceedings Of The National Academy Of Sciences Of The United States Of America 2018, 115: e3256-e3265. PMID: 29555745, PMCID: PMC5889651, DOI: 10.1073/pnas.1719654115.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseObstructive pulmonary diseaseCandidate vaccine antigensHuman airwaysPulmonary diseaseVaccine antigensRespiratory tract pathogensHuman respiratory tractProspective studyTract pathogensNTHi isolatesRespiratory tractAnimal modelsVaccine developmentHuman infectionsAirwayNTHiSurface moleculesAmino acid sequence changesWhole-genome sequencingAntigenBacterial pathogensDiseaseSubset of strainsVirulence functions
2017
Immunoglobulin A Protease Variants Facilitate Intracellular Survival in Epithelial Cells By Nontypeable Haemophilus influenzae That Persist in the Human Respiratory Tract in Chronic Obstructive Pulmonary Disease
Murphy TF, Kirkham C, Gallo MC, Yang Y, Wilding GE, Pettigrew MM. Immunoglobulin A Protease Variants Facilitate Intracellular Survival in Epithelial Cells By Nontypeable Haemophilus influenzae That Persist in the Human Respiratory Tract in Chronic Obstructive Pulmonary Disease. The Journal Of Infectious Diseases 2017, 216: 1295-1303. PMID: 28968876, PMCID: PMC5853902, DOI: 10.1093/infdis/jix471.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseNontypeable Haemophilus influenzaeObstructive pulmonary diseaseExpression of IgARespiratory epithelial cellsLysosomal-associated membrane protein 1Pulmonary diseaseEpithelial cellsIntracellular survivalHaemophilus influenzaeHuman respiratory epithelial cellsPathogenesis of infectionHuman respiratory tractIgA proteasePassage of strainsMembrane protein 1Host cellsProtease expressionNTHi infectionNTHi isolatesRespiratory tractHost epithelial cellsIgAIntracellular persistenceReduced survival
2015
Expression of IgA Proteases by Haemophilus influenzae in the Respiratory Tract of Adults With Chronic Obstructive Pulmonary Disease
Murphy TF, Kirkham C, Jones MM, Sethi S, Kong Y, Pettigrew MM. Expression of IgA Proteases by Haemophilus influenzae in the Respiratory Tract of Adults With Chronic Obstructive Pulmonary Disease. The Journal Of Infectious Diseases 2015, 212: 1798-1805. PMID: 25995193, PMCID: PMC4633762, DOI: 10.1093/infdis/jiv299.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseObstructive pulmonary diseaseH. influenzaeIgA protease genePulmonary diseaseHuman airwaysHaemophilus influenzaeIgA proteaseH. influenzae infectionsHuman respiratory epithelial cellsHuman IgA1Respiratory epithelial cellsInfluenzae infectionRespiratory tractIgA protease activitySputum samplesClinical settingInfluenzaeEpithelial cellsInfectionAirwayIgA1 fragmentsDiseaseIgA1Protease gene
2012
Upper Respiratory Tract Microbial Communities, Acute Otitis Media Pathogens, and Antibiotic Use in Healthy and Sick Children
Pettigrew MM, Laufer AS, Gent JF, Kong Y, Fennie KP, Metlay JP. Upper Respiratory Tract Microbial Communities, Acute Otitis Media Pathogens, and Antibiotic Use in Healthy and Sick Children. Applied And Environmental Microbiology 2012, 78: 6262-6270. PMID: 22752171, PMCID: PMC3416608, DOI: 10.1128/aem.01051-12.Peer-Reviewed Original ResearchConceptsAcute otitis mediaAntibiotic useS. pneumoniaeHealthy childrenM. catarrhalisH. influenzaeAcute otitis media pathogensConcurrent acute otitis mediaUpper respiratory tract infectionRespiratory tract infectionsOtitis media pathogensUpper respiratory tractCross-sectional studyYears of ageAOM pathogensTract infectionsOtitis mediaMoraxella catarrhalisRespiratory tractReal-time PCRNasal swabsSick childrenPrevention strategiesHaemophilus influenzaeStreptococcus pneumoniae
2011
Microbial Communities of the Upper Respiratory Tract and Otitis Media in Children
Laufer AS, Metlay JP, Gent JF, Fennie KP, Kong Y, Pettigrew MM. Microbial Communities of the Upper Respiratory Tract and Otitis Media in Children. MBio 2011, 2: 10.1128/mbio.00245-10. PMID: 21285435, PMCID: PMC3031303, DOI: 10.1128/mbio.00245-10.Peer-Reviewed Original ResearchConceptsOtitis mediaUpper respiratory tractS. pneumoniaeRespiratory tractOtitis media treatmentRespiratory virus seasonS. pneumoniae colonizationOtitis media pathogensCross-sectional studyOtitis media susceptibilityPneumoniae colonizationDecreased riskPneumococcal colonizationNasal swabsFrequent causePrevention strategiesStreptococcus pneumoniaeDemographic dataProtective floraPneumoniaeSwabsChildrenCausal pathwaysTractRisk
2006
Variation in the Presence of Neuraminidase Genes among Streptococcus pneumoniae Isolates with Identical Sequence Types
Pettigrew MM, Fennie KP, York MP, Daniels J, Ghaffar F. Variation in the Presence of Neuraminidase Genes among Streptococcus pneumoniae Isolates with Identical Sequence Types. Infection And Immunity 2006, 74: 3360-3365. PMID: 16714565, PMCID: PMC1479257, DOI: 10.1128/iai.01442-05.Peer-Reviewed Original ResearchConceptsPneumoniae isolatesSequence typesUpper respiratory tractNeuraminidase geneS. pneumoniae isolatesVirulence determinantsStreptococcus pneumoniae isolatesIdentical sequence typesYoung childrenAdditional virulence determinantsSialic acid-containing substratesCapsule typesMultilocus sequence typesOtitis mediaInvasive diseaseRespiratory tractCarriage isolatesPneumococcal clonesSame sequence typePneumococcal strainsImportant causeStreptococcus pneumoniaeMiddle earDifferent tissue sourcesPneumococcal neuraminidase