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Updated: May 27, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Inducible clindamycin resistance among methicillin-sensitive Staphylococcus aureus infections in pediatric patients
Dror S Shouval1, Zmira Samra, Itamar Shalit
1Department of Pediatrics C, Schneider Children's Medical Center of Israel, Petah Tikva, Israel.
Background:
Staphylococcus aureus infections are a major cause of morbidity and mortality worldwide. Clindamycin is widely used in the treatment of staphylococcal infections; however, it is our impression that in the last few years, inducible clindamycin resistance (ICR) has become more prevalent.
Objective:
To assess the prevalence of ICR in methicillin-sensitive Staphylococcus aureus (MSSA) infections among pediatric patients in Israel.
Methods:
We reviewed the files of children diagnosed with MSSA infections during the period January 2006 to June 2007 forfull antibiogram (includingthe D-test for ICR), phage typing and randomly amplified polymorphic DNA.
Results:
Altogether, 240 MSSA isolates were recovered, mainly from wounds and abscesses. ICR was detected in 62 of 68 erythromycin-resistant/clindamycin-sensitive strains (91%); the ICR rate for the total number of isolates was 26% (62/240). Phage type analysis demonstrated that 38 of 61 ICR isolates (62%) were sensitive to group 2, compared to 42 of 172 isolates (24%) that did not express ICR (P < 0.01). On randomly amplified polymorphic DNA, phage type 2 isolates expressing ICR belonged to the same clone, which was different from ICR isolates sensitive to other phages and from isolates not expressing ICR.
Conclusions:
Inducible clindamycin resistance is common among methicillin-sensitive Staphylococcus aureus in Israeli children. The D-test should be performed routinely in all MSSA isolates.
Insights
Inducible clindamycin resistance is common in pediatric Staphylococcus aureus infections in Israel. Routine D-tests are recommended for methicillin-sensitive Staphylococcus aureus (MSSA) to detect this resistance.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Clinical Pediatrics
Background:
- Staphylococcus aureus infections pose a significant global health burden.
- Clindamycin is a common antibiotic for staphylococcal infections.
- Increasing prevalence of inducible clindamycin resistance (ICR) is observed.
Purpose of the Study:
- To determine the prevalence of ICR in pediatric methicillin-sensitive Staphylococcus aureus (MSSA) infections in Israel.
- To evaluate the significance of ICR in clinical settings.
Main Methods:
- Retrospective review of pediatric MSSA infection cases from January 2006 to June 2007.
- Antibiogram testing, including the D-test for ICR.
- Phage typing and randomly amplified polymorphic DNA analysis.
Main Results:
- 240 MSSA isolates were analyzed, primarily from wounds and abscesses.
- ICR was found in 26% of all MSSA isolates (62/240).
- A specific clone of phage type 2 was associated with ICR.
Conclusions:
- Inducible clindamycin resistance is prevalent in pediatric MSSA in Israel.
- Routine D-testing for ICR in MSSA is recommended for appropriate treatment.
- Understanding ICR prevalence is crucial for antibiotic stewardship.
Related Concept Videos
Clinical Significance of Antibiotic Resistance
Mechanism of Antibiotic Resistance in MRSA
Staphylococcal Skin Infections
Development of Antibiotic Resistance
