Serotype Changes and Drug Resistance in Invasive Pneumococcal Diseases in Adults after Vaccinations in Children, Japan, 2010-2013.
After 7-valent pneumococcal conjugate vaccine (PCV) for children was introduced in Japan in November 2010, we examined changes in Streptococcus pneumoniae serotypes and in genetic antimicrobial drug resistance of isolates from adults with invasive pneumococcal diseases. During April 2010-March 2013, a total of 715 isolates were collected from adults with invasive pneumococcal diseases. Seven-valent PCV serotypes in adults decreased from 43.3% to 23.8%, most noticeably for serotype 6B. Concomitantly, 23-valent pneumococcal polysaccharide vaccine (PPSV23) serotypes decreased from 82.2% to 72.2%; non-PPSV23 serotypes increased from 13.8% to 25.1%. Parallel with serotype changes, genotypic penicillin-resistant S. pneumoniae decreased from 32.4% to 21.1%, and 6 non-PPSV23 serotypes emerged (6D, 15A, 15C, 16F, 23A, and 35B). Respective vaccine coverage rates for 13-valent PCV and PPSV23 differed by disease: 73.9% and 84.3% for patients with pneumonia, 56.4% and 69.2% for patients with bacteremia and sepsis, and 45.7% and 69.3% for patients with meningitis.
Kimiko
K
Ubukata
Naoko
N
Chiba
Shigeo
S
Hanada
Miyuki
M
Morozumi
Takeaki
T
Wajima
Michi
M
Shouji
Satoshi
S
Iwata
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000276:immunology / Q000627:therapeutic use*; D004352:Drug Resistance, Microbial / Q000235:genetics / Q000276:immunology; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008875:Middle Aged; D011008:Pneumococcal Infections / Q000453:epidemiology / Q000401:mortality / Q000517:prevention & control / Q000821:virology*; D022242:Pneumococcal Vaccines / Q000276:immunology / Q000627:therapeutic use*; D065288:Serogroup
D000900:Anti-Bacterial Agents; D022242:Pneumococcal Vaccines
Japan; MLST; PCV13; PCV7; PPSV23; adult; antimicrobial resistance; bacteria; drug resistance; invasive pneumococcal diseases; respiratory infections; serotypes; streptococci; vaccines