TY - JOUR
T1 - Effects of pneumococcal conjugate vaccine on genotypic penicillin resistance and serotype changes, Japan, 2010–2017
AU - Invasive Pneumococcal Diseases Surveillance Study Group
AU - Ubukata, Kimiko
AU - Takata, Misako
AU - Morozumi, Miyuki
AU - Chiba, Naoko
AU - Wajima, Takeaki
AU - Hanada, Shigeo
AU - Shouji, Michi
AU - Sakuma, Megumi
AU - Iwata, Satoshi
N1 - Funding Information:
We thank Madoka Naitoh and Shinji Masuyoshi for their assistance. We are also grateful to the laboratory personnel and physicians who participated in this study. Our study was funded in part by a grant to K.U. under the category “Research on Emerging and Re-emerging Infectious Diseases” (H22-013) from the Japanese Ministry of Health, Labour and Welfare.
Funding Information:
Our study was funded in part by a grant to K.U. under the category “Research on Emerging and Re-emerging Infectious Diseases” (H22-013) from the Japanese Ministry of Health, Labour and Welfare.
Publisher Copyright:
© 2018, Centers for Disease Control and Prevention (CDC). All rights reserved.
PY - 2018/11
Y1 - 2018/11
N2 - To clarify year-to-year changes in capsular serotypes, resistance genotypes, and multilocus sequence types of Streptococcus pneumoniae, we compared isolates collected from patients with invasive pneumococcal disease before and after introductions of 7-and 13-valent pneumococcal conjugate vaccines (PCV7 and PVC13, respectively). From April 2010 through March 2017, we collected 2,856 isolates from children and adults throughout Japan. Proportions of PCV13 serotypes among children decreased from 89.0% in fiscal year 2010 to 12.1% in fiscal year 2016 and among adults from 74.1% to 36.2%. Although nonvaccine serotypes increased after introduction of PCV13, genotypic penicillin resistance decreased from 54.3% in 2010 to 11.2% in 2016 among children and from 32.4% to 15.5% among adults. However, genotypic penicillin resistance emerged in 9 nonvaccine serotypes, but not 15A and 35B. Multilocus sequence typing suggested that resistant strains among nonvaccine serotypes may have evolved from clonal complexes 156 and 81. A more broadly effective vaccine is needed.
AB - To clarify year-to-year changes in capsular serotypes, resistance genotypes, and multilocus sequence types of Streptococcus pneumoniae, we compared isolates collected from patients with invasive pneumococcal disease before and after introductions of 7-and 13-valent pneumococcal conjugate vaccines (PCV7 and PVC13, respectively). From April 2010 through March 2017, we collected 2,856 isolates from children and adults throughout Japan. Proportions of PCV13 serotypes among children decreased from 89.0% in fiscal year 2010 to 12.1% in fiscal year 2016 and among adults from 74.1% to 36.2%. Although nonvaccine serotypes increased after introduction of PCV13, genotypic penicillin resistance decreased from 54.3% in 2010 to 11.2% in 2016 among children and from 32.4% to 15.5% among adults. However, genotypic penicillin resistance emerged in 9 nonvaccine serotypes, but not 15A and 35B. Multilocus sequence typing suggested that resistant strains among nonvaccine serotypes may have evolved from clonal complexes 156 and 81. A more broadly effective vaccine is needed.
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U2 - 10.3201/eid2411.180326
DO - 10.3201/eid2411.180326
M3 - Article
C2 - 30334707
AN - SCOPUS:85055073713
VL - 24
SP - 2010
EP - 2020
JO - Emerging Infectious Diseases
JF - Emerging Infectious Diseases
SN - 1080-6040
IS - 11
ER -
