A case of pharyngitis caused by Streptococcus pneumoniae.

Area of Science:

• Microbiology
• Infectious Diseases
• Clinical Medicine

Background:

• Pharyngitis is a common condition, often caused by viral or bacterial pathogens.
• Streptococcus pneumoniae is a leading cause of bacterial pneumonia and meningitis, but less commonly associated with pharyngitis in adults.

Observation:

• A throat culture from an adult patient with pharyngitis revealed a high count of Streptococcus pneumoniae as the sole organism.
• The isolated Streptococcus pneumoniae strain exhibited resistance to macrolide and fluoroquinolone antibiotics.
• The same resistant strain was also identified in the patient's denture washing solution.

Findings:

• The patient was treated with ceftriaxone, an antibiotic effective against Streptococcus pneumoniae.
• Clinical improvement and a reduction in bacterial count were observed concurrently with ceftriaxone therapy.
• This clinical course supported the diagnosis of pneumococcal pharyngitis.

Implications:

• This case highlights Streptococcus pneumoniae as a potential pathogen in adult pharyngitis, particularly in antibiotic-resistant strains.
• The presence of the bacteria on dentures suggests a potential reservoir for pharyngeal colonization.
• Effective treatment with ceftriaxone underscores the importance of appropriate antibiotic selection for resistant bacterial infections.