MRSA chronic bacterial laryngitis: A growing problem.

OBJECTIVES: Chronic bacterial infection of the larynx is characterized by long-standing hoarseness and exudative laryngitis. Prolonged antibiotic therapy is required to clear the infection, and methicillin-resistant staphylococcus aureus (MRSA) may be the responsible pathogen. The objective of this study was to describe the presentation, comorbidities, treatment response, and underlying etiology- including the incidence of MRSA-in our patient population with chronic bacterial laryngitis.

METHODS: A review of patients with a diagnosis of chronic bacterial laryngitis from 2012 to 2016 was performed. Diagnosis of chronic bacterial laryngitis was based on clinical history and findings on flexible laryngoscopy. In selected cases, the diagnosis of bacterial laryngitis was confirmed by operative biopsy. Information regarding clinical presentation and course was collected.

RESULTS: Twenty-eight patients were included in the study. Twenty-three were treated empirically with Amoxicillin-clavulonic acid for a minimum of 21 days. Twelve of the 23 (52%) had recurrence or nonresolution of infection. Seven of the 12 nonresponders (58%) were found to have MRSA by laryngeal tissue culture. Five patients were treated initially with Sulfamethoxazole and trimethoprim, and all resolved the infection without the need for further treatment. There was a nonstatistically significant increase in smoking and reflux in the MRSA population compared to the non-MRSA group.

CONCLUSION: MRSA infection was documented in 30% of patients overall with chronic bacterial laryngitis. Based on the results of the study, a treatment algorithm for management of this unusual patient population is suggested.

LEVEL OF EVIDENCE: 4. Laryngoscope, 128:921-925, 2018.