Red grain botryomycosis due to Staphylococcus aureus--a novel case report

Area of Science:

• Medical Mycology
• Bacteriology
• Dermatology

Background:

• Botryomycosis is a chronic bacterial infection.
• Typically caused by Staphylococcus aureus or other bacteria.
• Characterized by yellowish-white grains in purulent discharge.

Observation:

• A 35-year-old male presented with an eight-month history of inflammatory foot swelling, redness, and sinuses.
• Purulent discharge contained bright red, round to oval grains (0.5-1 mm).
• Gram-positive cocci were identified in granules and tissue.

Findings:

• Culture confirmed pure, heavy growth of Staphylococcus aureus.
• This is the first reported case of red grain botryomycosis caused by Staphylococcus aureus.
• The patient responded well to cefazolin treatment.

Implications:

• Challenges the established understanding of botryomycosis grain coloration.
• Highlights the potential for Staphylococcus aureus to produce red grains.
• Suggests a need for broader diagnostic considerations in botryomycosis cases.