2024
Intranasal neomycin evokes broad-spectrum antiviral immunity in the upper respiratory tract
Mao T, Kim J, Peña-Hernández M, Valle G, Moriyama M, Luyten S, Ott I, Gomez-Calvo M, Gehlhausen J, Baker E, Israelow B, Slade M, Sharma L, Liu W, Ryu C, Korde A, Lee C, Monteiro V, Lucas C, Dong H, Yang Y, Initiative Y, Gopinath S, Wilen C, Palm N, Dela Cruz C, Iwasaki A, Vogels C, Hahn A, Chen N, Breban M, Koch T, Chaguza C, Tikhonova I, Castaldi C, Mane S, De Kumar B, Ferguson D, Kerantzas N, Peaper D, Landry M, Schulz W, Grubaugh N. Intranasal neomycin evokes broad-spectrum antiviral immunity in the upper respiratory tract. Proceedings Of The National Academy Of Sciences Of The United States Of America 2024, 121: e2319566121. PMID: 38648490, PMCID: PMC11067057, DOI: 10.1073/pnas.2319566121.Peer-Reviewed Original ResearchConceptsInterferon-stimulated genesRespiratory infectionsStrains of influenza A virusTreatment of respiratory viral infectionsRespiratory virus infectionsInfluenza A virusMouse model of COVID-19Respiratory viral infectionsNeomycin treatmentExpression of interferon-stimulated genesUpper respiratory infectionInterferon-stimulated gene expressionLower respiratory infectionsBroad spectrum of diseasesAdministration of neomycinRespiratory viral diseasesDisease to patientsUpper respiratory tractIntranasal deliveryCongenic miceIntranasal applicationNasal mucosaSevere acute respiratory syndrome coronavirus 2Acute respiratory syndrome coronavirus 2A virus
2021
Pneumococcal Colonization and Virulence Factors Identified Via Experimental Evolution in Infection Models
Green AE, Howarth D, Chaguza C, Echlin H, Langendonk RF, Munro C, Barton TE, Hinton J, Bentley SD, Rosch JW, Neill DR. Pneumococcal Colonization and Virulence Factors Identified Via Experimental Evolution in Infection Models. Molecular Biology And Evolution 2021, 38: 2209-2226. PMID: 33502519, PMCID: PMC8136498, DOI: 10.1093/molbev/msab018.Peer-Reviewed Original Research
2020
Hypervirulent pneumococcal serotype 1 harbours two pneumolysin variants with differential haemolytic activity
Panagiotou S, Chaguza C, Yahya R, Audshasai T, Baltazar M, Ressel L, Khandaker S, Alsahag M, Mitchell TJ, Prudhomme M, Kadioglu A, Yang M. Hypervirulent pneumococcal serotype 1 harbours two pneumolysin variants with differential haemolytic activity. Scientific Reports 2020, 10: 17313. PMID: 33057054, PMCID: PMC7560715, DOI: 10.1038/s41598-020-73454-w.Peer-Reviewed Original ResearchConceptsPneumococcal serotype 1Invasive pneumococcal diseaseSerotype 1Haemolytic activityVivo mouse modelDetectable haemolytic activityNeutrophil-mediated phagocytosisPneumococcal diseaseCommon causeInfection doseHuman reservoirMouse modelRapid onsetStreptococcus pneumoniaeDisease symptomsLethal doseClonal typesVirulence propertiesGlobal pathogenST306IgA proteaseSymptomsSequence typesMiceDose
2017
Population genetic structure, antibiotic resistance, capsule switching and evolution of invasive pneumococci before conjugate vaccination in Malawi
Chaguza C, Cornick JE, Andam CP, Gladstone RA, Alaerts M, Musicha P, Peno C, Bar-Zeev N, Kamng'ona AW, Kiran AM, Msefula CL, McGee L, Breiman RF, Kadioglu A, French N, Heyderman RS, Hanage WP, Bentley SD, Everett DB. Population genetic structure, antibiotic resistance, capsule switching and evolution of invasive pneumococci before conjugate vaccination in Malawi. Vaccine 2017, 35: 4594-4602. PMID: 28711389, PMCID: PMC5571440, DOI: 10.1016/j.vaccine.2017.07.009.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultBacterial CapsulesChildChild, PreschoolDrug Resistance, Multiple, BacterialEvolution, MolecularFemaleGenome, BacterialHigh-Throughput Nucleotide SequencingHumansInfantInfant, NewbornMalawiMalePneumococcal InfectionsPneumococcal VaccinesPrevalenceRetrospective StudiesSerogroupSerotypingStreptococcus pneumoniaeVaccinationVaccines, ConjugateYoung AdultConceptsPneumococcal conjugate vaccineMDR ratePneumococcal isolatesHigher MDR rateImplementation of PCV13Prevalence of serotypesNon-vaccine serotypesInvasive pneumococcal isolatesGood infection preventionAntibiotic resistance ratesAntibiotic resistanceAbsence of vaccinesReplacement serotypesSerotype replacementInvasive pneumococciPneumococcal infectionConjugate vaccineSerotype 12FDisease burdenInfection preventionSerotype prevalenceHigh prevalenceInvasive isolatesContinued surveillanceResistance ratesGenomic landscape of extended-spectrum β-lactamase resistance in Escherichia coli from an urban African setting
Musicha P, Feasey NA, Cain AK, Kallonen T, Chaguza C, Peno C, Khonga M, Thompson S, Gray KJ, Mather AE, Heyderman RS, Everett DB, Thomson NR, Msefula CL. Genomic landscape of extended-spectrum β-lactamase resistance in Escherichia coli from an urban African setting. Journal Of Antimicrobial Chemotherapy 2017, 72: 1602-1609. PMID: 28333330, PMCID: PMC5437524, DOI: 10.1093/jac/dkx058.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultBeta-Lactam ResistanceBeta-LactamasesChildChild, PreschoolChloramphenicolDrug Resistance, Multiple, BacterialEscherichia coliEscherichia coli InfectionsFemaleGenes, BacterialGenetic VariationGenomicsHumansMalawiMaleMicrobial Sensitivity TestsMultilocus Sequence TypingPhylogenyUrban PopulationYoung AdultConceptsAntimicrobial resistanceExtended spectrum β-lactamase resistanceEscherichia coli infectionResource-rich settingsUrban African settingCommon ESBL geneLow-income settingsPhenotypic resistance profilesΒ-lactamase resistanceColi infectionESBL resistanceGlobal epidemiologyFluoroquinolone resistanceQueen's HospitalBla CTXESBL genesMolecular epidemiologyResistance profilesMolecular patternsAfrican settingClinical sourcesHospitalE. coliEpidemiologyST131Genomic Epidemiology of Penicillin-Nonsusceptible Pneumococci with Nonvaccine Serotypes Causing Invasive Disease in the United States
Andam CP, Mitchell PK, Callendrello A, Chang Q, Corander J, Chaguza C, McGee L, Beall BW, Hanage WP. Genomic Epidemiology of Penicillin-Nonsusceptible Pneumococci with Nonvaccine Serotypes Causing Invasive Disease in the United States. Journal Of Clinical Microbiology 2017, 55: 1104-1115. PMID: 28100596, PMCID: PMC5377837, DOI: 10.1128/jcm.02453-16.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAged, 80 and overChildChild, PreschoolEpidemiological MonitoringEvolution, MolecularFemaleGenome, BacterialGenotypeHumansInfantInfant, NewbornMaleMiddle AgedMolecular EpidemiologyPenicillin ResistancePneumococcal InfectionsSequence Analysis, DNASerogroupStreptococcus pneumoniaeUnited StatesYoung AdultConceptsActive Bacterial Core surveillancePneumococcal Molecular Epidemiology NetworkNonvaccine typesVaccine typesPenicillin-nonsusceptible pneumococciAntibiotic-resistant strainsNVT pneumococciNonvaccine serotypesSerotype 35BPneumococcal serotypesInvasive diseaseSerogroups 23Core surveillanceEpidemiology NetworkDisease controlDisease prevalencePNSPGenomic epidemiologyFuture surveillanceVaccinationSerotypesResistant clonesSerotype switchingPneumococciDisease
2015
High multiple carriage and emergence of Streptococcus pneumoniae vaccine serotype variants in Malawian children
Kamng’ona A, Hinds J, Bar-Zeev N, Gould KA, Chaguza C, Msefula C, Cornick JE, Kulohoma BW, Gray K, Bentley SD, French N, Heyderman RS, Everett DB. High multiple carriage and emergence of Streptococcus pneumoniae vaccine serotype variants in Malawian children. BMC Infectious Diseases 2015, 15: 234. PMID: 26088623, PMCID: PMC4474563, DOI: 10.1186/s12879-015-0980-2.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentBacterial CapsulesBacteriological TechniquesChildChild, PreschoolCross ProtectionDNA, BacterialFemaleGenetic VariationHIV InfectionsHumansInfantInfant, NewbornMalawiMaleNasopharynxOligonucleotide Array Sequence AnalysisPhylogenyPneumococcal InfectionsPneumococcal VaccinesSequence Analysis, DNASerogroupStreptococcus pneumoniaeConceptsPneumococcal carriageVaccine typesPneumococcal serotypesMalawian childrenMultiple carriageMultiple serotypesVaccine serotypes 6BInvasive pneumococcal diseaseMultiple pneumococcal serotypesCent of childrenYoung childrenVT serotypesPCV13 introductionPneumococcal diseaseNasopharyngeal samplesPossible genetic alterationsSerotypes 6BMethodsThe studyPneumococcal strainsVaccine escapeKaronga DistrictOlder childrenSterile swabsDistinct serotypesGenetic alterations