2024
A low-cost culture- and DNA extraction-free method for the molecular detection of pneumococcal carriage in saliva.
Peno C, Lin T, Hislop M, Yolda-Carr D, Farjado K, York A, Pitzer V, Weinberger D, Bei A, Allicock O, Wyllie A. A low-cost culture- and DNA extraction-free method for the molecular detection of pneumococcal carriage in saliva. Microbiology Spectrum 2024, e0059124. PMID: 39028185, DOI: 10.1128/spectrum.00591-24.Peer-Reviewed Original ResearchDetection of pneumococciDetection of pneumococcal carriagePneumococcal carriageCarriage surveillanceLow-resource settingsChildren attending childcare centersCarriage of pneumococciDNA extractionSaliva samplesMolecular methodsCultural enrichmentImprove surveillance effortsQPCR-based protocolPneumococcal vaccineExtraction-free methodMolecular detectionNucleic acid extractionVaccination strategiesPneumococciCulture-enrichment methodExtraction-free protocolPurified DNASalivaPaired samplesCarriageUpper respiratory Streptococcus pneumoniae colonization among working-age adults with prevalent exposure to overcrowding
Parker A, Jackson N, Awasthi S, Kim H, Alwan T, Wyllie A, Kogut K, Holland N, Mora A, Eskenazi B, Riley L, Lewnard J. Upper respiratory Streptococcus pneumoniae colonization among working-age adults with prevalent exposure to overcrowding. Microbiology Spectrum 2024, 12: e00879-24. PMID: 39012111, PMCID: PMC11302326, DOI: 10.1128/spectrum.00879-24.Peer-Reviewed Original ResearchPneumococcal carriageStreptococcus pneumoniae</i>Pneumococcal diseaseLt;5 yearsPredictors of carriagePrecursor to pneumococcal diseaseAssociated with increased riskRisk of carriageExposure to childrenYoung childrenExposure to young childrenCycle threshold valuesPneumococcal densityVulnerable age groupRisk factorsPneumococcal transmissionIncreased prevalenceNon-carriersPneumococciAge groupsCarriageSaliva samplesAdult populationMilitary recruitsQuantitative PCR assaySerological Profiling of Pneumococcal Proteins Reveals Unique Patterns of Acquisition, Maintenance, and Waning of Antibodies Throughout Life
He S, Voß F, Nicolaie M, Brummelman J, van de Garde M, Bijvank E, Poelen M, Wijmenga-Monsuur A, Wyllie A, Trzciński K, Van Beek J, Rots N, Hartog G, Hammerschmidt S, van C. Serological Profiling of Pneumococcal Proteins Reveals Unique Patterns of Acquisition, Maintenance, and Waning of Antibodies Throughout Life. The Journal Of Infectious Diseases 2024, jiae216. PMID: 38679601, DOI: 10.1093/infdis/jiae216.Peer-Reviewed Original ResearchIgG levelsPneumococcal proteinsAntibody responseLow IgG levelsSerum IgG levelsWaning of antibodiesIncreased IgG levelsAdults aged >Age-targeted interventionsProtein-specific antibody responsesPneumococcal carriageOlder adults aged >Streptococcus pneumoniaeSerological profileOlder infantsOlder ageOlder childrenOlder adultsAntibodiesAgeCarriageAdultsChildrenUnique pattern
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 ResearchConceptsNasopharyngeal 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 ResearchPersistence 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 ResearchConceptsInvasive 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 participantsPneumococciPrevalenceDiseaseCarriage
2022
Association 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 ResearchConceptsSARS-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 ResearchConceptsSecond cohortImproved vaccine formulationsFirst cohortFuture vaccination strategiesSingle nucleotide polymorphismsHost immune factorsAge-specific differencesPneumococcal carriageImmune factorsVaccination strategiesBacterial carriageCarriage studiesVaccine formulationsCohortGenetic factorsAdult hostsSerotypesHost ageAdultsCarriageChildrenGenetic backgroundWeak evidenceInfantsPopulation
2021
1321. Acquisition and Transmission of Streptococcus pneumoniae in Individuals Over the Age of 60 Years Residing in New Haven, CT, USA
Wyllie A, Mbodj S, Yolda-Carr D, Thammavongsa D, Waghela P, Nakahata M, Vega N, York A, Allicock O, Alexander-Parrish R, Arguedas A, Gessner B, Weinberger D, Hislop M. 1321. Acquisition and Transmission of Streptococcus pneumoniae in Individuals Over the Age of 60 Years Residing in New Haven, CT, USA. Open Forum Infectious Diseases 2021, 8: 749-749. PMCID: PMC8689704, DOI: 10.1093/ofid/ofab466.1513.Peer-Reviewed Original ResearchPneumococcal carriageSaliva samplesOlder adultsPreventative public health measuresPneumococcal conjugate vaccineNew Haven areaPublic health measuresPneumococcal acquisitionPneumococcal diseaseConjugate vaccinePneumococcal transmissionStudy enrollmentMedical historyImportant burdenDemonstrate evidenceStreptococcus pneumoniaeHealth measuresMultiple timepointsTime pointsWeeksAdultsCOVID-19 pandemicAgeHigh ratePneumococci
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 ResearchConceptsInvasive 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 categories
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 standard
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