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Updated: Apr 14, 2026

Investigating the Effects of Probiotics on Pneumococcal Colonization Using an In Vitro Adherence Assay
Published on: April 28, 2014
[Control study on antimicrobial resistance of invasive and non-invasive Streptococcus pneumoniae in children]
Li-Hong Dai1, Lin Dong, Hai-Yan Li
1Department of Respiratory Medicine, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China. donglin@wzhealth.com.
Insights
Antimicrobial resistance in invasive Streptococcus pneumoniae (SP) strains in children is high, with significant resistance to common antibiotics. This study highlights the need for careful antimicrobial drug selection for treating SP infections.
Area of Science:
- Microbiology
- Pediatric Infectious Diseases
- Antimicrobial Resistance
Context:
- Streptococcus pneumoniae (SP) is a leading cause of invasive pneumococcal diseases (IPD) and lower respiratory tract infections in children.
- Understanding antimicrobial resistance patterns is crucial for effective treatment and public health strategies.
Purpose:
- To investigate the antimicrobial resistance profiles of invasive and non-invasive SP strains in pediatric populations.
- To guide the appropriate use of antimicrobial agents in managing SP infections.
Summary:
- A study of 70 children with IPD and 164 with SP-caused lower respiratory tract infections identified 82 invasive SP strains.
- Invasive SP detection rates declined from 2009-2013. Penicillin-nonsusceptible SP was found in 27% of invasive and 17% of non-invasive strains.
- Multidrug resistance rates were high (89% invasive, 93% non-invasive), with significant resistance to cephalosporins and carbapenems among penicillin-nonsusceptible strains.
Impact:
- Findings demonstrate a decreasing trend in invasive SP detection but persistent high rates of antimicrobial resistance.
- Drug susceptibility data provides critical guidance for optimizing antimicrobial therapy in pediatric pneumococcal infections.
- This research underscores the importance of ongoing surveillance and tailored treatment approaches for SP.
Objective:
To investigate the antimicrobial resistance of invasive and non-invasive Streptococcus pneumoniae (SP) strains in children and to provide a basis for proper use of antimicrobial drugs in the treatment of SP infection.
Methods:
Seventy children who were diagnosed with invasive pneumococcal diseases (IPD) between January 2009 and December 2013 were enrolled, and 164 children with lower respiratory tract infection caused by SP were randomly selected as the control group. The samples from sterile sites (blood, cerebrospinal fluid, etc) of children with IPD, as well as the sputum samples of children in the control group, were collected for bacterial culture, and the drug susceptibility tests for isolated SP strains were conducted.
Results:
A total of 82 invasive strains of SP were isolated from sterile sites of 70 children with IPD; 49 strains (60%) were isolated from blood, and 19 strains (23%) from cerebrospinal fluid. The detection rate of invasive SP strains decreased from 2009 to 2013 (P<0.01). The total detection rates of penicillin-nonsusceptible SP from the invasive and non-invasive strains were 27% and 17% respectively (P>0.05). Among invasive strains, the penicillin-nonsusceptible SP strains had significantly higher rates of insusceptibility to cefotaxime, ceftriaxone, and cefepime than the penicillin-susceptible SP (P<0.01). There were significant differences in the rates of insusceptibility to cefotaxime, ceftriaxone, and meropenem between the sensitive and non-sensitive SP strains (P<0.05). The multidrug resistance rates of the invasive and non-invasive SP strains were 89% and 93% respectively (P>0.05).
Conclusions:
Invasive SP can easily invade the blood in children, but the total detection rate has decreased year by year. The results of drug sensitivity tests have guiding significance for proper use of antimicrobial drugs for different SP infections.
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