climates, however, it is being more frequently reported among patients with
diabetes or malignancy, or those who are immunocompromised. It is predomin
antly caused by Staphylococcus aureus, and rarely by Bacteroides species. P
yomyositis due to Prevotella melaninogenica has not previously been reporte
d. We describe an elderly patient with pyomyositis of the thigh due to P. m
elaninogenica which was successfully treated by surgical incision and drain
age in combination with metronidazole therapy.