JCM Figure table search 04
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Beall, B.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Beall, B.

 Previous Article  |  Next Article 

Journal of Clinical Microbiology, March 2006, p. 999-1017, Vol. 44, No. 3
0095-1137/06/$08.00+0     doi:10.1128/JCM.44.3.999-1017.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Pre- and Postvaccination Clonal Compositions of Invasive Pneumococcal Serotypes for Isolates Collected in the United States in 1999, 2001, and 2002

Bernard Beall,1* M. Catherine McEllistrem,2 Robert E. Gertz Jr.,1 Stephanie Wedel,3 David J. Boxrud,3 Antonio L. Gonzalez,1 Marie-Jo Medina,1 Rekha Pai,1 Terry A. Thompson,1 Lee H. Harrison,2,4 Lesley McGee,1,5 Cynthia G. Whitney,1 and the Active Bacterial Core Surveillance Team

Respiratory Diseases Branch, Division of Bacterial and Mycotic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia,1 University of Pittsburgh Graduate School of Public Health and School of Medicine, Pittsburgh, Pennsylvania,2 Minnesota Department of Health, Minneapolis, Minnesota,3 Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland,4 Department of International Health, Rollins School of Public Health, Emory University, Atlanta, Georgia5

Received 17 October 2005/ Returned for modification 28 November 2005/ Accepted 5 December 2005

Monitoring of serotypes and their clonal associations is critical as pneumococci adapt to the selective pressures exerted by the pneumococcal seven-valent conjugate vaccine (PCV7). We genotyped 1,476 invasive isolates from the Active Bacterial Core surveillance (705 [89.8%] of the isolates were obtained from children <5 years of age, and 771 [18.4%] of the isolates were obtained from individuals >5 years of age) in 2001 and 2002 (after the introduction of PCV7). The data were compared to the results for 1,168 invasive isolates (855 [83.9%] of the isolates were from children <5 years of age) collected in 1999. Among children <5 years of age, the incidence of invasive disease due to non-PCV7 serogroups together with serogroup 19A increased (P < 0.001). Eighty-three clonal sets, representing 177 multilocus sequence types (STs), were compiled from the 3-year isolate set. Among the non-PCV7 serogroups, newly emerging clones were uncommon; and a significant expansion of already established clones occurred for serotypes 3 (ST180), 7F (ST191), 15BCF (ST199), 19A (ST199), 22F (ST433), 33F (ST662), and 38 (ST393). However, additional minor clonal types within serotypes 1, 6A, 6B, 7C, 9N, 10A, 12F, 14, 15B/C, 17F, 19A, 19F, 20, 22F, and 33F that were absent in 1999 were found during 2001 and 2002. Although 23 clonal sets exhibited multiple serotypes, for most serotypes there were either no changes or modest changes in clonal compositions since the introduction of PCV7. The only example of an identical ST shared between non-PCV7 and PCV7 or PCV7-related serotypes was ST199; however, ST199 was prevalent within serotypes 15B/C and 19A before and after PCV7 introduction. Continued genotypic surveillance is warranted, since certain clones not targeted by PCV7 are expanding, and their emergence as significant pathogens could occur with maintained vaccine pressure.

* Corresponding author. Mailing address: Centers for Disease Control and Prevention, 1600 Clifton Rd., NE, Mailstop C02, Atlanta, GA 30333. Phone: (404) 639-1237. Fax: (404) 639-4215. E-mail: BBEALL{at}CDC.GOV.

Journal of Clinical Microbiology, March 2006, p. 999-1017, Vol. 44, No. 3
0095-1137/06/$08.00+0     doi:10.1128/JCM.44.3.999-1017.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:



Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
Antimicrob. Agents Chemother. Clin. Microbiol. Rev.
Clin. Vaccine Immunol. ALL ASM JOURNALS

Copyright © 2006 by the American Society for Microbiology. All rights reserved.