Giuseppe
Emeritus
[Source: Journal of Infectious Diseases, full page: (LINK). Abstract, edited.]
Effect of the 13-valent Pneumococcal Conjugate Vaccine on Nasopharyngeal Colonization by Streptococcus pneumoniae ? Alaska, 2008?2012
Prabhu P. Gounder 1, Michael G. Bruce 1, Dana J. T. Bruden 1, Rosalyn J. Singleton 1,2, Karen Rudolph 1, Debby A. Hurlburt 1, Thomas W. Hennessy 1 and Jay Wenger 1
Author Affiliations: <SUP>1</SUP>Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Infectious Disease, Centers for Disease Control and Prevention (CDC), Anchorage, Alaska <SUP>2</SUP>Alaska Native Tribal Health Consortium, Anchorage, Alaska
Corresponding author: Prabhu Gounder, MD, Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Diseases, Centers for Disease Control and Prevention (CDC), 4055 Tudor Centre Drive, Anchorage, Alaska 99508 (iym4@cdc.gov)
<CITE><ABBR>J Infect Dis.</ABBR> (2013) doi: 10.1093/infdis/jit642 / </CITE>First published online: November 23, 2013
Abstract
Background.
In 2010, a 13-valent pneumococcal conjugate vaccine (PCV13) replaced a 7-valent vaccine (PCV7) that contained all PCV7 serotypes plus 6 additional serotypes (PCV6+). We conducted annual surveys from 2008?2012 to determine the effect of PCV13 on colonization by pneumococcal serotypes.
Methods.
We obtained nasopharyngeal swabs for pneumococcal identification and serotyping from residents of all ages at 8 rural villages and children age <60 months at 2 urban clinics. We conducted interviews/medical records review for all participants.
Results.
A total of 18,207 nasopharyngeal swabs (rural=16,098; urban=2,109) were collected. From 2008?2012, 84% of rural and 90% of urban children age <5 years were age-appropriately vaccinated with a PCV. Overall pneumococcal colonization prevalence remained stable among rural (66%) and urban (35%) children age <5 years, and adults age >18 years (14%). Colonization by PCV6+ serotypes declined significantly among rural children age <5 years, urban children age <5, and adults age >18 over the course of the study (25%?5%, 22%?9%, 22%?6%, respectively).
Conclusions.
PCV13 was rapidly introduced into the Alaska childhood immunization schedule and reduced colonization by PCV6+ serotypes among children. Unvaccinated adults also experienced comparable reductions in vaccine serotype colonization indicating substantial indirect protection from PCV13.
Received July 12, 2013. Revision received October 18, 2013. Accepted October 30, 2013.
Published by Oxford University Press on behalf of the Infectious Diseases Society of America 2013.
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Effect of the 13-valent Pneumococcal Conjugate Vaccine on Nasopharyngeal Colonization by Streptococcus pneumoniae ? Alaska, 2008?2012
Prabhu P. Gounder 1, Michael G. Bruce 1, Dana J. T. Bruden 1, Rosalyn J. Singleton 1,2, Karen Rudolph 1, Debby A. Hurlburt 1, Thomas W. Hennessy 1 and Jay Wenger 1
Author Affiliations: <SUP>1</SUP>Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Infectious Disease, Centers for Disease Control and Prevention (CDC), Anchorage, Alaska <SUP>2</SUP>Alaska Native Tribal Health Consortium, Anchorage, Alaska
Corresponding author: Prabhu Gounder, MD, Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Diseases, Centers for Disease Control and Prevention (CDC), 4055 Tudor Centre Drive, Anchorage, Alaska 99508 (iym4@cdc.gov)
<CITE><ABBR>J Infect Dis.</ABBR> (2013) doi: 10.1093/infdis/jit642 / </CITE>First published online: November 23, 2013
Abstract
Background.
In 2010, a 13-valent pneumococcal conjugate vaccine (PCV13) replaced a 7-valent vaccine (PCV7) that contained all PCV7 serotypes plus 6 additional serotypes (PCV6+). We conducted annual surveys from 2008?2012 to determine the effect of PCV13 on colonization by pneumococcal serotypes.
Methods.
We obtained nasopharyngeal swabs for pneumococcal identification and serotyping from residents of all ages at 8 rural villages and children age <60 months at 2 urban clinics. We conducted interviews/medical records review for all participants.
Results.
A total of 18,207 nasopharyngeal swabs (rural=16,098; urban=2,109) were collected. From 2008?2012, 84% of rural and 90% of urban children age <5 years were age-appropriately vaccinated with a PCV. Overall pneumococcal colonization prevalence remained stable among rural (66%) and urban (35%) children age <5 years, and adults age >18 years (14%). Colonization by PCV6+ serotypes declined significantly among rural children age <5 years, urban children age <5, and adults age >18 over the course of the study (25%?5%, 22%?9%, 22%?6%, respectively).
Conclusions.
PCV13 was rapidly introduced into the Alaska childhood immunization schedule and reduced colonization by PCV6+ serotypes among children. Unvaccinated adults also experienced comparable reductions in vaccine serotype colonization indicating substantial indirect protection from PCV13.
Received July 12, 2013. Revision received October 18, 2013. Accepted October 30, 2013.
Published by Oxford University Press on behalf of the Infectious Diseases Society of America 2013.
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