Changing antimicrobial resistance profiles of Streptococcus pneumoniae isolated from pediatric patients in Chongqing area from 2011 to 2022
10.16718/j.1009-7708.2025.01.005
- VernacularTitle:2011-2022年重庆地区儿童患者临床分离肺炎链球菌的耐药性变迁
- Author:
Jie ZHAO
1
;
Xiaoyan YU
1
;
Chunmei JING
1
Author Information
1. 重庆医科大学附属儿童医院检验科,国家儿童健康与疾病临床医学研究中心,儿童发育疾病研究教育部重点实验室,儿童感染与免疫罕见病重庆市重点实验室,重庆 400014
- Publication Type:Journal Article
- Keywords:
Streptococcus pneumoniae;
antimicrobial resistance;
changing resistance pattern;
children
- From:
Chinese Journal of Infection and Chemotherapy
2025;25(1):24-29
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the changing antimicrobial resistance profiles of Streptococcus pneumoniae isolates from children in Chongqing area from 2011 to 2022,and to provide evidence for rational use of antibiotics and prevention of nosocomial infections.Methods The clinical data of S.pneumoniae strains isolated from pediatric patients during 2011-2022 were retrospectively analyzed.Antimicrobial susceptibility testing was performed with commercial automated systems and E-test.The results were interpreted according to the breakpoints in CLSI document(2022 edition).Results A total of 26 668 strains of S.pneumoniae were isolated during the 12-year period.The proportion of S.pneumoniae was 16.0％in the total pathogenic bacterial isolates and 46.4％in all the gram-positive bacterial pathogens.S.pneumoniae strains were mainly isolated from respiratory specimens(97.1％),followed by blood samples(1.5％).The highest proportion of S.pneumoniae isolates was in infants(38.2％),followed by toddlers(32.4％),preschool age(22.9％),school age(5.6％),adolescents(0.6％)and neonates(0.4％).All of the 38 strains of nonmeningitis SS.pneumoniae(0.1％)isolated from cerebrospinal fluid were resistant to penicillin.Overall,35.7％and 32.4％of these strains were resistant to cefotaxime and meropenem,respectively.The majority of S.pneumoniae(99.9％,26 630/26 668)were nonmeningitis isolates.The prevalence of penicillin-susceptible(PSSP),-intermediate(PISP),and-resistant(PRSP)strains was 71.9％(16 083),25.1％(5 610),and 3.0％(674),respectively.The prevalence of PRSP in infants and preschool children was higher than that in other age groups.The nonmeningitis S.pneumoniae isolates showed higher than 95％resistance rate to erythromycin,clindamycin and tetracycline,but 0.2％,0.2％and 0.1％resistance rate to levofloxacin,moxifloxacin and rifampicin,respectively.No S.pneumoniae strains were found resistant to vancomycin or linezolid.Conclusions The proportion and antimicrobial resistance profiles of S.pneumoniae strains isolated from pediatric patients varied with age group and specimen type.The decreasing prevalence of PRSP may inform empirical treatment of S.pneumoniae infections in children in Chongqing area.
