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Acquired subglottic stenosis caused by methicillin resistant Staphylococcus aureus that produce epidermal cell
1Department of Pediatrics, Kansai Medical University Otokoyama Hospital, Kyoto, Japan.
Abstract:
Local infection of the trachea in intubated neonates is one of the main risk factors for development of acquired subglottic stenosis, although its role in the pathogenesis is unclear. Methicillin resistant Staphylococcus aureus (MRSA) is often the cause of critical illness in neonatal patients. Two cases are reported of acquired subglottic stenosis following bacterial infection of the trachea, suggesting an association with the staphylococcal exotoxin, epidermal cell differentiation inhibitor (EDIN). EDIN-producing MRSA were isolated from purulent tracheal secretions from both infants. Acquired subglottic stenosis in both cases was probably caused by delayed wound healing as the result of EDIN inhibition of epithelial cell migration.
Insights
Tracheal infections in intubated neonates can lead to subglottic stenosis. Epidermal cell differentiation inhibitor (EDIN) from MRSA may impede healing, contributing to this condition.
Area of Science:
- Neonatal critical care
- Infectious diseases
- Pediatric otolaryngology
Background:
- Local tracheal infection is a risk factor for acquired subglottic stenosis in intubated neonates.
- The precise role of infection in the pathogenesis of this condition remains unclear.
- Methicillin-resistant Staphylococcus aureus (MRSA) frequently causes severe illness in neonates.
Observation:
- Two cases of acquired subglottic stenosis following bacterial tracheal infections in neonates are presented.
- Both infants had purulent tracheal secretions from which EDIN-producing MRSA were isolated.
- This suggests a potential link between staphylococcal exotoxin EDIN and the development of stenosis.
Findings:
- Epidermal cell differentiation inhibitor (EDIN) may play a role in the pathogenesis of acquired subglottic stenosis.
- EDIN is a staphylococcal exotoxin that inhibits epithelial cell migration.
- The presence of EDIN-producing MRSA in tracheal infections may delay wound healing.
Implications:
- EDIN's inhibitory effect on epithelial cell migration could be a mechanism for delayed wound healing in neonatal tracheal infections.
- This finding may help elucidate the pathogenesis of acquired subglottic stenosis in intubated neonates.
- Further research into EDIN's role could inform preventative or therapeutic strategies for neonatal subglottic stenosis.