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Updated: Jun 10, 2025
Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
Predictors of Methicillin-resistant Staphylococcus aureus infection in children with acute osteomyelitis
Kang Wang1, Chen Wang2, Hua Zhu2
1Department of Orthopedics, Children's Hospital of Hebei Province, No. 133 Jianhua South Street, Shijiazhuang City, Hebei Province, China. wangkang5@126.com.
Background:
This study aims to identify risk factors associated with Methicillin-resistant Staphylococcus aureus (MRSA) infection in children diagnosed with acute osteomyelitis (AO) and to elucidate the laboratory characteristics of these MRSA-infected children to enhance early targeted therapeutic interventions.
Methods:
We conducted a retrospective analysis involving 123 children with acute osteomyelitis treated at our hospital. Upon admission, we measured white blood cell (WBC) counts, C-reactive protein (CRP) levels, erythrocyte sedimentation rates (ESR), and platelet counts. Patients were categorized into two groups: the non-MRSA group (n = 73) and the MRSA group (n = 50), with values assigned as follows (non-MRSA group = 0, MRSA group = 1).
Results:
The MRSA group had a significantly higher average age compared to the non-MRSA group (P < 0.05). Notably, the incidence of suppurative arthritis was significantly lower in the MRSA group (P < 0.05). At the time of admission, CRP levels in the MRSA group were markedly elevated compared to those in the non-MRSA group (P < 0.01). After three days of empirical therapy, both WBC and CRP levels remained significantly higher in the MRSA group compared to the non-MRSA group (P < 0.05).
Conclusions:
In children newly admitted with acute osteomyelitis, a CRP level exceeding 73.23 µg/mL may indicate a high likelihood of MRSA infection. For children with AO who have been hospitalized for three days on empirical therapy, the presence of WBC > 10.95 × 10^9/L, CRP > 49.56 µg/mL, age > 3.5 years, and the absence of suppurative arthritis suggests a heightened risk of MRSA infection.
Insights
Methicillin-resistant Staphylococcus aureus (MRSA) infection in children with acute osteomyelitis (AO) is associated with higher C-reactive protein (CRP) and white blood cell (WBC) counts. Early identification of MRSA in pediatric AO cases can be aided by specific clinical and laboratory markers.
Area of Science:
- Pediatric infectious diseases
- Clinical microbiology
- Orthopedic surgery
Background:
- Acute osteomyelitis (AO) is a bone infection that can affect children.
- Methicillin-resistant Staphylococcus aureus (MRSA) is a common cause of healthcare-associated infections.
- Early identification of MRSA in pediatric AO is crucial for effective treatment.
Purpose of the Study:
- Identify risk factors for MRSA infection in children with AO.
- Characterize laboratory findings in MRSA-infected children with AO.
- Improve early targeted therapeutic interventions for MRSA in pediatric AO.
Main Methods:
- Retrospective analysis of 123 children with AO.
- Measurement of WBC, CRP, ESR, and platelet counts upon admission.
- Categorization into non-MRSA (n=73) and MRSA (n=50) groups.
Main Results:
- MRSA group had higher average age and markedly elevated CRP levels on admission.
- Suppurative arthritis incidence was lower in the MRSA group.
- Elevated WBC and CRP levels persisted in the MRSA group after three days of empirical therapy.
Conclusions:
- A CRP level > 73.23 µg/mL upon admission may indicate MRSA infection in pediatric AO.
- Specific markers (WBC > 10.95×10^9/L, CRP > 49.56 µg/mL, age > 3.5 years, absence of suppurative arthritis) suggest heightened MRSA risk after 3 days of therapy.
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