Pneumococcal colonization among tracheostomy tube dependent children.

Area of Science:

• Microbiology
• Infectious Diseases
• Pediatrics

Background:

• Streptococcus pneumoniae colonization precedes pneumococcal disease.
• Children with tracheostomies face higher risks of pneumococcal pneumonia.
• Lower airway pneumococci in tracheostomy patients are understudied.

Purpose of the Study:

• To compare lower respiratory tract Streptococcus pneumoniae isolates from tracheostomy patients and acutely intubated individuals.
• To characterize pneumococci by penicillin susceptibility, co-colonization, genetic background, and serotype.

Main Methods:

• Collected pneumococcal isolates from the lower respiratory tract of 27 tracheostomy patients and 42 acutely intubated patients.
• Analyzed isolates for penicillin susceptibility, co-colonization rates, genetic diversity (MLST), and serotypes.

Main Results:

• Isolates from both groups exhibited high genetic diversity, with 40 MLSTs and 20 serotypes identified.
• No significant differences were observed in serotype distribution, co-colonization rates, vaccine coverage, or penicillin non-susceptibility.
• First-time identification of non-vaccine serotypes 15B/C, 23B, and 35B in tracheostomy patients' lower airways.

Conclusions:

• Lower airway pneumococcal colonization in tracheostomy patients is genetically diverse and similar to that in acutely intubated patients.
• Findings support increasing trends of non-vaccine serotype colonization and disease.
• Further research into specific serotypes and their clinical impact in vulnerable populations is warranted.