Staphylococcus lentus Sinusitis: A New Sinonasal Pathogen

Area of Science:

• Otolaryngology
• Infectious Diseases
• Microbiology

Background:

• Common pathogens in acute bacterial rhinosinusitis include Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis.
• Chronic rhinosinusitis is typically associated with Staphylococcus aureus and anaerobic bacteria.
• This report focuses on a novel pathogen in sinonasal infections.

Observation:

• A 62-year-old male patient presented with chronic rhinosinusitis unresponsive to medical treatment.
• Functional endoscopic sinus surgery was performed, and cultures revealed Staphylococcus lentus.
• The patient had no reported animal contact.

Findings:

• Staphylococcus lentus, an animal pathogen, was identified as the causative agent of chronic rhinosinusitis.
• This marks the first documented case of Staphylococcus lentus in the human sinonasal cavity.
• The patient showed improvement following surgery and appropriate antibiotic therapy.

Implications:

• Otolaryngologists should consider Staphylococcus lentus in refractory chronic rhinosinusitis cases.
• Routine intraoperative cultures are essential for accurate diagnosis and targeted antibiotic selection.
• This finding expands the spectrum of known sinonasal pathogens in humans.