2023
Saliva as an alternative sample type for detection of pneumococcal carriage in young children
Wyllie A, Rots N, Wijmenga-Monsuur A, van Houten M, Sanders E, Trzciński K. Saliva as an alternative sample type for detection of pneumococcal carriage in young children. Microbiology 2023, 169: 001394. PMID: 37819029, PMCID: PMC10634364, DOI: 10.1099/mic.0.001394.Peer-Reviewed Original ResearchMeSH KeywordsAgedCarrier StateChildChild, PreschoolHumansInfantPneumococcal InfectionsSalivaSerotypingStreptococcus pneumoniaeConceptsNasopharyngeal swabsCarriage detectionPneumococcal carriageSaliva samplesSubset of serotypesOlder age groupsConventional cultureAlternative sample typePneumococcal colonizationPneumococcal detectionPolymicrobial growthAge groupsStudy participantsSaliva samplingSwabsDiagnostic culturesGold standardLongitudinal studyYoung childrenSalivaCarriageChildrenInfantsMolecular detection methodsPneumococciHigh Levels of Detection of Nonpneumococcal Species of Streptococcus in Saliva from Adults in the United States
Hislop M, Allicock O, Thammavongsa D, Mbodj S, Nelson A, Shaw A, Weinberger D, Wyllie A. High Levels of Detection of Nonpneumococcal Species of Streptococcus in Saliva from Adults in the United States. Microbiology Spectrum 2023, 11: e05207-22. PMID: 37067447, PMCID: PMC10269540, DOI: 10.1128/spectrum.05207-22.Peer-Reviewed Original ResearchMeSH KeywordsAgedHumansPneumococcal InfectionsPolymerase Chain ReactionReproducibility of ResultsSalivaStreptococcus pneumoniaeUnited StatesPersistence of Pneumococcal Carriage among Older Adults in the Community despite COVID-19 Mitigation Measures
Wyllie A, Mbodj S, Thammavongsa D, Hislop M, Yolda-Carr D, Waghela P, Nakahata M, Stahlfeld A, Vega N, York A, Allicock O, Wilkins G, Ouyang A, Siqueiros L, Strong Y, Anastasio K, Alexander-Parrish R, Arguedas A, Gessner B, Weinberger D. Persistence of Pneumococcal Carriage among Older Adults in the Community despite COVID-19 Mitigation Measures. Microbiology Spectrum 2023, 11: e04879-22. PMID: 37036377, PMCID: PMC10269788, DOI: 10.1128/spectrum.04879-22.Peer-Reviewed Original ResearchMeSH KeywordsAgedCarrier StateChildChild, PreschoolCOVID-19HumansInfantNasopharynxPandemicsPneumococcal InfectionsStreptococcus pneumoniaeConceptsInvasive pneumococcal diseasePneumococcal diseaseSchool-aged childrenOlder adultsPneumococcal carriageSaliva samplesCOVID-19 pandemicRate of carriageCOVID-19-related disruptionsUpper respiratory tractRegular contactNew Haven areaFirst yearCarriage prevalencePre-pandemic levelsMedical historyRespiratory tractHigh prevalenceStreptococcus pneumoniaeCOVID-19 mitigation measuresStudy participantsPneumococciPrevalenceDiseaseCarriageMagnetic bead-based separation of pneumococcal serotypes
York A, Huynh E, Mbodj S, Yolda-Carr D, Hislop M, Echlin H, Rosch J, Weinberger D, Wyllie A. Magnetic bead-based separation of pneumococcal serotypes. Cell Reports Methods 2023, 3: 100410. PMID: 36936076, PMCID: PMC10014298, DOI: 10.1016/j.crmeth.2023.100410.Peer-Reviewed Original Research
2022
Impact of Temporary Storage Conditions on the Viability of Streptococcus pneumoniae in Saliva
Allicock O, York A, Waghela P, Yolda-Carr D, Weinberger D, Wyllie A. Impact of Temporary Storage Conditions on the Viability of Streptococcus pneumoniae in Saliva. MSphere 2022, 7: e00331-22. PMID: 36409104, PMCID: PMC9769876, DOI: 10.1128/msphere.00331-22.Peer-Reviewed Original ResearchAssociation of Upper Respiratory Streptococcus pneumoniae Colonization With Severe Acute Respiratory Syndrome Coronavirus 2 Infection Among Adults
Parker A, Jackson N, Awasthi S, Kim H, Alwan T, Wyllie A, Baldwin A, Brennick N, Moehle E, Giannikopoulos P, Kogut K, Holland N, Mora-Wyrobek A, Eskenazi B, Riley L, Lewnard J. Association of Upper Respiratory Streptococcus pneumoniae Colonization With Severe Acute Respiratory Syndrome Coronavirus 2 Infection Among Adults. Clinical Infectious Diseases 2022, 76: 1209-1217. PMID: 36401872, DOI: 10.1093/cid/ciac907.Peer-Reviewed Original ResearchMeSH KeywordsAdultCOVID-19HumansNasopharynxPneumococcal InfectionsSARS-CoV-2Streptococcus pneumoniaeConceptsSARS-CoV-2 infectionSARS-CoV-2Upper airwayAcute respiratory syndrome coronavirus 2 infectionSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infectionSevere acute respiratory syndrome coronavirus 2Syndrome coronavirus 2 infectionAcute respiratory syndrome coronavirus 2Respiratory syndrome coronavirus 2SARS-CoV-2 molecular testingCoronavirus 2 infectionStreptococcus pneumoniae colonizationViral respiratory pathogensSyndrome coronavirus 2Conditional logistic regressionWorking-age adultsQuantitative polymerase chain reactionPneumococcal carriersPneumococcal carriagePneumoniae colonizationOutpatient clinicCoronavirus 2Polymerase chain reactionRespiratory pathogensSaliva specimensPneumococcal genetic variability in age-dependent bacterial carriage
Kremer P, Ferwerda B, Bootsma HJ, Rots NY, Wijmenga-Monsuur AJ, Sanders E, Trzciński K, Wyllie AL, Turner P, van der Ende A, Brouwer MC, Bentley SD, van de Beek D, Lees JA. Pneumococcal genetic variability in age-dependent bacterial carriage. ELife 2022, 11: e69244. PMID: 35881438, PMCID: PMC9395192, DOI: 10.7554/elife.69244.Peer-Reviewed Original ResearchMeSH KeywordsAdultCarrier StateChildGenome-Wide Association StudyHumansInfantNasopharynxPneumococcal InfectionsPneumococcal VaccinesSerogroupStreptococcus pneumoniaeConceptsSecond cohortImproved vaccine formulationsFirst cohortFuture vaccination strategiesSingle nucleotide polymorphismsHost immune factorsAge-specific differencesPneumococcal carriageImmune factorsVaccination strategiesBacterial carriageCarriage studiesVaccine formulationsCohortGenetic factorsAdult hostsSerotypesHost ageAdultsCarriageChildrenGenetic backgroundWeak evidenceInfantsPopulation
2020
Serotype Patterns of Pneumococcal Disease in Adults Are Correlated With Carriage Patterns in Older Children
Wyllie AL, Warren JL, Regev-Yochay G, Givon-Lavi N, Dagan R, Weinberger DM. Serotype Patterns of Pneumococcal Disease in Adults Are Correlated With Carriage Patterns in Older Children. Clinical Infectious Diseases 2020, 72: e768-e775. PMID: 32989457, PMCID: PMC8315131, DOI: 10.1093/cid/ciaa1480.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultCarrier StateChildHumansInfantIsraelPneumococcal InfectionsPneumococcal VaccinesSerogroupStreptococcus pneumoniaeConceptsInvasive pneumococcal diseaseSerotype-specific invasive pneumococcal diseaseDisease patternsOlder childrenPneumococcal diseasePneumococcal carriageCarriage prevalenceSerotype patternsCause of IPDIPD dataSerotype-specific carriage prevalenceAge groupingsDifferent age groupsComorbidity statusDisease burdenVaccination strategiesAge-related patternsCarriage dataCarriage patternsDifferent age categoriesAge groupsSpecific serotypesYoung adultsAdultsAge categoriesUpper respiratory tract colonization with Streptococcus pneumoniae in adults
Arguedas A, Trzciński K, O’Brien K, Ferreira DM, Wyllie AL, Weinberger D, Danon L, Pelton SI, Azzari C, Hammitt LL, Sá-Leão R, Brandileone MC, Saha S, Suaya J, Isturiz R, Jodar L, Gessner BD. Upper respiratory tract colonization with Streptococcus pneumoniae in adults. Expert Review Of Vaccines 2020, 19: 353-366. PMID: 32237926, DOI: 10.1080/14760584.2020.1750378.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnimalsCarrier StateHumansMolecular Diagnostic TechniquesNasopharynxPneumococcal InfectionsRespiratory Tract InfectionsStreptococcus pneumoniaeConceptsPediatric approachPneumococcal colonizationPneumococcal detectionRespiratory sitesUpper respiratory tract colonizationAdult respiratory tractRespiratory tract colonizationHigh disease burdenPneumococcal carriage studiesRespiratory carriageNasal washesPeer-reviewed journalsRespiratory colonizationCarriage prevalencePneumococcal transmissionTract colonizationDisease burdenRespiratory tractCarriage studiesCurrent evidenceStreptococcus pneumoniaeMolecular diagnostic methodsRoutine cultureAdultsRecent evidence
2019
Variation of growth characteristics of pneumococcus with environmental conditions
Tóthpál A, Desobry K, Joshi SS, Wyllie AL, Weinberger DM. Variation of growth characteristics of pneumococcus with environmental conditions. BMC Microbiology 2019, 19: 304. PMID: 31878880, PMCID: PMC6933730, DOI: 10.1186/s12866-019-1671-8.Peer-Reviewed Original ResearchJoint sequencing of human and pathogen genomes reveals the genetics of pneumococcal meningitis
Lees JA, Ferwerda B, Kremer PHC, Wheeler NE, Serón MV, Croucher NJ, Gladstone RA, Bootsma HJ, Rots NY, Wijmega-Monsuur AJ, Sanders EAM, Trzciński K, Wyllie AL, Zwinderman AH, van den Berg LH, van Rheenen W, Veldink JH, Harboe ZB, Lundbo LF, de Groot LCPGM, van Schoor NM, van der Velde N, Ängquist LH, Sørensen TIA, Nohr EA, Mentzer AJ, Mills TC, Knight JC, du Plessis M, Nzenze S, Weiser JN, Parkhill J, Madhi S, Benfield T, von Gottberg A, van der Ende A, Brouwer MC, Barrett JC, Bentley SD, van de Beek D. Joint sequencing of human and pathogen genomes reveals the genetics of pneumococcal meningitis. Nature Communications 2019, 10: 2176. PMID: 31092817, PMCID: PMC6520353, DOI: 10.1038/s41467-019-09976-3.Peer-Reviewed Original ResearchConceptsGenetic variationGenome-wide association studiesCommon nasopharyngeal colonizerPathogen genomesHalf of variationPneumococcal factorsPneumococcal genesAssociation studiesJoint sequencingHuman variationInvasive potentialLife-threatening invasive diseasesGenesPathogensInteraction analysisInvasivenessGenomeZmpDGeneticsSequencingColonizersHumansVariationHostSusceptibility
2017
Sequencing of the variable region of rpsB to discriminate between Streptococcus pneumoniae and other streptococcal species
Wyllie AL, Pannekoek Y, Bovenkerk S, van Engelsdorp Gastelaars J, Ferwerda B, van de Beek D, Sanders EAM, Trzciński K, van der Ende A. Sequencing of the variable region of rpsB to discriminate between Streptococcus pneumoniae and other streptococcal species. Open Biology 2017, 7: 170074. PMID: 28931649, PMCID: PMC5627049, DOI: 10.1098/rsob.170074.Peer-Reviewed Original ResearchConceptsSevere streptococcal diseaseUpper respiratory tractHuman upper respiratory tractSerotype-specific assaysMolecular assaysStreptococcal speciesNon-typeable pneumococciStreptococcal diseaseAsymptomatic individualsFalse-positive resultsRespiratory tractPneumococcal isolatesCarriage isolatesStreptococcal isolatesStreptococcus pneumoniaeLack of specificityStreptococciPositive resultsPneumococciDiseaseCarriageAssaysIsolatesVast majorityMeningitis
2016
Molecular surveillance on Streptococcus pneumoniae carriage in non-elderly adults; little evidence for pneumococcal circulation independent from the reservoir in children
Wyllie AL, Rümke LW, Arp K, Bosch AA, Bruin JP, Rots NY, Wijmenga-Monsuur AJ, Sanders EA, Trzciński K. Molecular surveillance on Streptococcus pneumoniae carriage in non-elderly adults; little evidence for pneumococcal circulation independent from the reservoir in children. Scientific Reports 2016, 6: 34888. PMID: 27713565, PMCID: PMC5054371, DOI: 10.1038/srep34888.Peer-Reviewed Original ResearchConceptsCarriage rateNasopharyngeal swabsOral samplesUpper respiratory tract samplesVaccine herd effectsStreptococcus pneumoniae carriageRespiratory tract samplesHigh carriage rateNon-elderly adultsS. pneumoniae detectionAge-associated differencesEntire adult populationChildless adultsSerotype replacementPneumoniae carriagePneumococcal carriageTract samplesCarriage frequencyStreptococcus pneumoniaeAdult populationSerotype 3Gold standard culture methodMolecular surveillanceMolecular testsGold standardMolecular surveillance of nasopharyngeal carriage of Streptococcus pneumoniae in children vaccinated with conjugated polysaccharide pneumococcal vaccines
Wyllie AL, Wijmenga-Monsuur AJ, van Houten MA, Bosch AATM, Groot JA, van Engelsdorp Gastelaars J, Bruin JP, Bogaert D, Rots NY, Sanders EAM, Trzciński K. Molecular surveillance of nasopharyngeal carriage of Streptococcus pneumoniae in children vaccinated with conjugated polysaccharide pneumococcal vaccines. Scientific Reports 2016, 6: 23809. PMID: 27046258, PMCID: PMC4820691, DOI: 10.1038/srep23809.Peer-Reviewed Original ResearchConceptsPneumococcal conjugate vaccinePolysaccharide pneumococcal vaccineVaccine-targeted serotypesStreptococcus pneumoniae carriageCross-sectional surveillanceVaccine serotypes 4Number of serotypesPneumococcal surveillancePneumococcal vaccinePneumoniae carriageUnvaccinated individualsConjugate vaccineNasopharyngeal carriagePneumococcal diseaseVaccine effectsNasopharyngeal samplesConventional diagnostic methodsSurveillance studyS. pneumoniaeStreptococcus pneumoniaeSerotype detectionMolecular surveillanceHidden circulationSerotypesDiagnostic methods
2015
Carriage of Streptococcus pneumoniae in Aged Adults with Influenza-Like-Illness
Krone CL, Wyllie AL, van Beek J, Rots NY, Oja AE, Chu ML, Bruin JP, Bogaert D, Sanders EA, Trzciński K. Carriage of Streptococcus pneumoniae in Aged Adults with Influenza-Like-Illness. PLOS ONE 2015, 10: e0119875. PMID: 25789854, PMCID: PMC4366201, DOI: 10.1371/journal.pone.0119875.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overDNA, BacterialFemaleHumansInfluenza, HumanMaleMiddle AgedPneumococcal InfectionsSalivaSerotypingStreptococcus pneumoniaeConceptsS. pneumoniaeStreptococcus pneumoniaeCarriage detectionSaliva samplesPneumococcal conjugated vaccineStudy time pointsPCV13 serotypesPneumococcal diseaseCarriage prevalenceNasopharyngeal colonisationNasopharyngeal swabsConjugated vaccineNasopharyngealAged adultsPneumococciTime pointsPneumoniaeCarriageInfantsConventional cultureIllnessSalivaInfluenzaDiseaseSerotypes
2014
Streptococcus pneumoniae in Saliva of Dutch Primary School Children
Wyllie AL, Chu ML, Schellens MH, van Engelsdorp Gastelaars J, Jansen MD, van der Ende A, Bogaert D, Sanders EA, Trzciński K. Streptococcus pneumoniae in Saliva of Dutch Primary School Children. PLOS ONE 2014, 9: e102045. PMID: 25013895, PMCID: PMC4094488, DOI: 10.1371/journal.pone.0102045.Peer-Reviewed Original ResearchConceptsPneumoniae carriagePneumococcal carriagePneumococcal strainsMultiple pneumococcal strainsStreptococcus pneumoniae carriageS. pneumoniae carriageS. pneumoniae strainsNumber of serotypesDutch primary school childrenNasopharyngeal samplingSchool-aged childrenPneumococcal detectionSurveillance studyS. pneumoniaePneumoniae strainsStreptococcus pneumoniaeSerotype composition
2013
Superiority of Trans-Oral over Trans-Nasal Sampling in Detecting Streptococcus pneumoniae Colonization in Adults
Trzciński K, Bogaert D, Wyllie A, Chu ML, van der Ende A, Bruin JP, van den Dobbelsteen G, Veenhoven RH, Sanders EA. Superiority of Trans-Oral over Trans-Nasal Sampling in Detecting Streptococcus pneumoniae Colonization in Adults. PLOS ONE 2013, 8: e60520. PMID: 23555985, PMCID: PMC3610877, DOI: 10.1371/journal.pone.0060520.Peer-Reviewed Original ResearchMeSH KeywordsAdultChild, PreschoolDNA, BacterialHumansNasopharynxParentsPneumococcal InfectionsPolymerase Chain ReactionStreptococcus pneumoniaeConceptsS. pneumoniaeLive pneumococciDiagnostic stepsTrans-nasal approachStreptococcus pneumoniae colonizationInitial diagnostic stepPneumoniae colonizationNasopharyngeal samplesPneumococcal colonizationNasopharyngeal colonizationStreptococcus pneumoniaeHuman nasopharynxPneumococciPneumoniaeCell harvestAdultsQPCRQPCR resultsMain reservoirMolecular methods