Background: The formation of granulation tissue is an important factor promoting recurrence after surgical treatment of laryngotracheal stenosis. Bacterial infection was claimed to be the cause.
Objective: The present study aimed to identify the bacteriology of granulation tissue in laryngotracheal stenosis patients.
Material and Method: Data was collected prospectively. Granulation tissue found in the site of laryngotracheal stenosis was removed and sent to the microbiologic study to identify the organisms.
Results: Twenty-four specimens from 17 patients were included in the present study. Coagulase-positive Staphylococcus (45.8%) was the most common gram-positive organism and Pseudomonas aeruginosa as well as Enterobacter species (16.7%) were the most common gram-negative bacteria. Ciprofloxacin may be the oral antibiotic that should be recommended.
Conclusion: Coagulase-positive Staphylococcus, Pseudomonas aeruginosa as well as Enterobacter species were the common organisms identified from the granulation tissue in recurrent laryngotracheal stenosis. Oral antibiotics, such as ciprofloxacin, may have benefit in reducing the formation of this granulation tissue.

Keywords: Laryngotracheal stenosis, Granulation tissue, Bacteriology