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An etiologic shift in infantile osteomyelitis: the emergence of the group B streptococcus
Insights
Group B streptococcus caused osteomyelitis in infants with uncomplicated births and single bone issues. Other bacteria led to more severe infant osteomyelitis, often with multiple bones affected.
Area of Science:
- Pediatrics
- Infectious Diseases
- Orthopedics
Background:
- Osteomyelitis in infants is a serious condition requiring prompt diagnosis and treatment.
- Understanding the causative agents and their clinical presentations is crucial for effective management.
Purpose of the Study:
- To analyze the etiologic agents of osteomyelitis in a cohort of infants.
- To differentiate the clinical characteristics and outcomes associated with different pathogens.
Main Methods:
- Retrospective study of 21 infants diagnosed with osteomyelitis between 1965 and 1977.
- Identification of causative agents including group B streptococcus, Staphylococcus aureus, gram-negative bacilli, and Streptococcus pneumoniae.
- Clinical data review including neonatal course, bone involvement, inflammatory signs, and functional outcomes.
Main Results:
- Group B streptococcus was identified in 8 cases, often presenting with uncomplicated neonatal courses, single bone involvement (proximal humerus predilection), and minimal inflammatory signs.
- Osteomyelitis caused by other organisms (Staphylococcus aureus, gram-negative bacilli, Streptococcus pneumoniae) was frequently associated with predisposing procedures, multiple bone involvement, fever, and leukocytosis.
- Functional impairment was minimal, with only one of 17 evaluated patients showing deficits at a mean of 36 months post-diagnosis.
Conclusions:
- Group B streptococcal osteomyelitis in infants has distinct clinical features compared to infections by other pathogens.
- Early identification of causative agents can guide treatment and predict outcomes in infantile osteomyelitis.
- Infant osteomyelitis, regardless of the causative agent, appears to have a favorable long-term functional prognosis with appropriate management.
Abstract:
Twenty-one infants from six to 52 days of age (mean 23.3 days) with osteomyelitis were studied between 1965 and 1977. The etiologic agents were group B streptococcus (8), staphylococcus aureus (6), gramnegative bacilli (4), Streptococcus pneumoniae (1), and unknown (2). Patients with group B streptococcal osteomyelitis were characterized by an uncomplicated neonatal course, single bone involvement with a predilection for involvement of the proximal humerus, and lack of inflammatory signs. In contrast, patients with osteomyelitis due to other organisms frequently had had manipulative procedures predisposing to infection and were more likely to have multiple bone involvement, fever, and leukocytosis at the time of diagnosis. Functional impairment was detected in only one of 17 patients evaluated a mean of 36 months after diagnosis.