2024
Serological 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 methodsPneumococciPersistence 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
Pneumococcal 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
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
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 ResearchConceptsS. pneumoniaeStreptococcus pneumoniaeCarriage detectionSaliva samplesPneumococcal conjugated vaccineStudy time pointsPCV13 serotypesPneumococcal diseaseCarriage prevalenceNasopharyngeal colonisationNasopharyngeal swabsConjugated vaccineNasopharyngealAged adultsPneumococciTime pointsPneumoniaeCarriageInfantsConventional cultureIllnessSalivaInfluenzaDiseaseSerotypes