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dc.contributor.authorHjálmarsdóttir, Martha Á
dc.contributor.authorGumundsdóttir, Pálína Fanney
dc.contributor.authorErlendsdóttir, Helga
dc.contributor.authorKristinsson, Karl G
dc.contributor.authorHaraldsson, Gunnsteinn
dc.date.accessioned2016-06-01T11:31:32Zen
dc.date.available2016-06-01T11:31:32Zen
dc.date.issued2016-05en
dc.date.submitted2016en
dc.identifier.citationCocolonization of Pneumococcal Serotypes in Healthy Children Attending Day Care Centers: Molecular Versus Conventional Methods. 2016, 35 (5):477-80 Pediatr. Infect. Dis. J.en
dc.identifier.issn1532-0987en
dc.identifier.pmid26808723en
dc.identifier.doi10.1097/INF.0000000000001059en
dc.identifier.urihttp://hdl.handle.net/2336/611370en
dc.descriptionTo access publisher's full text version of this article click on the hyperlink at the bottom of the pageen
dc.description.abstractPneumococci are common colonizer, especially of children, and cocolonization of different serotypes is an important factor for intraspecies genetic exchange. The aim of this study was to analyze pneumococcal carriage and serotype distribution in unvaccinated healthy children in Iceland and compare conventional culture methods and molecular methods using DNA extracted directly from the samples.
dc.description.abstractNasopharyngeal swabs were obtained from 514 children aged 2-6 year attending day care centers in Reykjavik in 2009. The swabs were selectively cultured for pneumococci and the isolates serotyped using latex agglutination. DNA was also extracted directly from the swabs and serotyped using a multiplex PCR panel designed to detect vaccine serotypes and the most commonly carried non-vaccine serotypes.
dc.description.abstractPneumococcal carriage was detected in 391 (76.1%) of the children using polymerase chain reaction (PCR) and in 371 (72.2%) using conventional methods. Cocolonization was detected in 92 (23.5%) of the carriers when PCR method was used and in 30 (8.1%) when conventional methods were used, detecting 500 and 401 strains, respectively (P < 0.0001). The most common serotypes were 23F, 19A, 6B, 6A and 19F, rates 13-8%. The number of isolates of serotypes included in the 10-valent and 13-valent vaccines and detected by PCR were 234 (58.4%) and 363 (90.5%), respectively and by conventional methods 186 (46.4%) and 293 (73.1%), respectively.
dc.description.abstractCocolonization was detected in a fourth of the children carrying pneumococci using DNA extracted directly from nasopharyngeal swabs. The rate of carriage was very high, but no serotype dominated, and the children were commonly colonized by vaccine serotypes, especially cocolonized children.
dc.description.sponsorshipLandspitali University Hospital Research Fund grant GSKen
dc.language.isoenen
dc.publisherLippincott Williams & Wilkinsen
dc.relation.urlhttp://dx.doi.org/ 10.1097/INF.0000000000001059en
dc.rightsArchived with thanks to The Pediatric infectious disease journalen
dc.subjectLungnabólgaen
dc.subjectLeikskólabörnen
dc.subjectSmitgáten
dc.subjectSmitsjúkdómaren
dc.subjectBAC12
dc.subjectNAF12
dc.subject.meshChild Day Care Centersen
dc.subject.meshChild, Preschoolen
dc.subject.meshPneumococcal Infections/epidemiologyen
dc.subject.meshNasopharynx/microbiologyen
dc.subject.meshStreptococcus pneumoniae/geneticsen
dc.titleCocolonization of Pneumococcal Serotypes in Healthy Children Attending Day Care Centers: Molecular Versus Conventional Methods.en
dc.typeArticleen
dc.contributor.department[ 1 ] Landspitali Univ Hosp, Dept Clin Microbiol, Reykjavik, Iceland   Organization-Enhanced Name(s)      Landspitali National University Hospital [ 2 ] Univ Iceland, Fac Med, Reykjavik, Iceland [ 3 ] Univ Iceland, Biomed Ctr, Reykjavik, Icelanden
dc.identifier.journalThe Pediatric infectious disease journalen
dc.rights.accessLandspitali Access - LSH-aðganguren
html.description.abstractPneumococci are common colonizer, especially of children, and cocolonization of different serotypes is an important factor for intraspecies genetic exchange. The aim of this study was to analyze pneumococcal carriage and serotype distribution in unvaccinated healthy children in Iceland and compare conventional culture methods and molecular methods using DNA extracted directly from the samples.
html.description.abstractNasopharyngeal swabs were obtained from 514 children aged 2-6 year attending day care centers in Reykjavik in 2009. The swabs were selectively cultured for pneumococci and the isolates serotyped using latex agglutination. DNA was also extracted directly from the swabs and serotyped using a multiplex PCR panel designed to detect vaccine serotypes and the most commonly carried non-vaccine serotypes.
html.description.abstractPneumococcal carriage was detected in 391 (76.1%) of the children using polymerase chain reaction (PCR) and in 371 (72.2%) using conventional methods. Cocolonization was detected in 92 (23.5%) of the carriers when PCR method was used and in 30 (8.1%) when conventional methods were used, detecting 500 and 401 strains, respectively (P < 0.0001). The most common serotypes were 23F, 19A, 6B, 6A and 19F, rates 13-8%. The number of isolates of serotypes included in the 10-valent and 13-valent vaccines and detected by PCR were 234 (58.4%) and 363 (90.5%), respectively and by conventional methods 186 (46.4%) and 293 (73.1%), respectively.
html.description.abstractCocolonization was detected in a fourth of the children carrying pneumococci using DNA extracted directly from nasopharyngeal swabs. The rate of carriage was very high, but no serotype dominated, and the children were commonly colonized by vaccine serotypes, especially cocolonized children.


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