Serotype and antimicrobial resistance patterns of Streptococcus pneumoniae isolated from Taiwanese children: comparison of nasopharyngeal and clinical isolates.
This report describes the serotypes and antimicrobial resistance patterns of 860 strains of Streptococcus pneumoniae isolated from nasopharyngeal (NP) carriers and clinical specimens collected from Taiwanese children during the years 1997 to 2003. The 6 most common serotypes/groups were 23F, 19F, 6B, 14, 6A, and 3. These accounted for 652/716 (91.1%) of the NP and 131/144 (91.0%) of the clinical isolates. Serotype 23F was the most common isolate in the NP carriers (25.7%, 184/716). Serogroup14 was most common in the clinical isolates (29.2%, 42/144) and the most frequent invasive isolate (43.4%, 33/76). It was more frequently associated with invasive infection than all other serotypes/groups (odds ratio = 7.2; 95% confidence interval, 4.16-12.46; P < .0001). Resistance to macrolides was high in all serotypes/groups, which ranged from 70% to 97%. Resistance to penicillin varied among the 6 leading serotypes/groups, ranging from 3% in serogroup 3 to 99% in serotype 19F. Serotype 23F was most likely to be multidrug resistant to penicillin, macrolides, and chloramphenicol compared with all others (107/150 [71%] versus 105/461 [23%], P < .0001). The potential coverage by the pentavalent and heptavalent vaccines was 83% for all isolates, but was significantly lower for NP than clinical isolates (81% versus 92%, P< .01). These findings provide baseline data to compare trends in the distribution of pneumococcal serotypes and antibiotic resistance patterns with the introduction of childhood pneumococcal vaccination in Taiwan and other countries.
Lauderdale
Tsai-Ling
TL
Division of Clinical Research, National Health Research Institutes, Zhunan 350, Taiwan.
Wagener
Marilyn M
MM
Lin
Hui Min
HM
Huang
I Fei
IF
Lee
Wei Yang
WY
Hseih
Kai Sheng
KS
Lai
Jui-Fen
JF
Chiou
Christine C
CC
D000293:Adolescent; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002353:Carrier State / Q000453:epidemiology / Q000382:microbiology*; D002648:Child; D002675:Child, Preschool; D002701:Chloramphenicol / Q000494:pharmacology; D003631:Day Care, Medical; D024901:Drug Resistance, Multiple, Bacterial; D006786:Hospitals, Urban; D006801:Humans; D007223:Infant; D018942:Macrolides / Q000494:pharmacology; D009302:Nasopharyngeal Diseases / Q000453:epidemiology / Q000382:microbiology*; D010406:Penicillins / Q000494:pharmacology; D011008:Pneumococcal Infections / Q000453:epidemiology / Q000382:microbiology* / Q000517:prevention & control; D022242:Pneumococcal Vaccines / Q000008:administration & dosage; D018571:Sentinel Surveillance; D012703:Serotyping; D013296:Streptococcus pneumoniae / Q000145:classification* / Q000187:drug effects*; D013624:Taiwan / Q000453:epidemiology
D000900:Anti-Bacterial Agents; D018942:Macrolides; D010406:Penicillins; D022242:Pneumococcal Vaccines; D002701:Chloramphenicol