Postpartum iliopsoas pyomyositis due to community-acquired methicillin-resistant Staphylococcus aureus.
BACKGROUND
Community-acquired, methicillin-resistant Staphylococcus aureus (MRSA) infections are on the rise among patients without risk factors for resistant microorganisms. A new, serious community-acquired MRSA manifestation, postpartum iliopsoas pyomyositis is described.


METHODS
A 24-year-old Hispanic female presented with back pain 9 days after a normal vaginal delivery. Magnetic resonance imaging showed extensive ill-defined edema of the left iliopsoas. Blood cultures yielded community-acquired MRSA. The patient received intravenous vancomycin for 6 days, followed by intravenous, then oral, trimethoprim-sulfamethoxazole. She was discharged on day 8 and made a full recovery.


CONCLUSIONS
Iliopsoas pyomyositis is a new manifestation of community-acquired MRSA in the obstetric population that may masquerade as benign musculoskeletal back pain. Obstetricians must be alert to the range of presentations of this emerging pathogen.
Department of Radiation Oncology, University of California Los Angeles, CA, USA.
Karen M
KM
Sokolov
Eva
E
Kreye
Loren G
LG
Miller
Chester
C
Choi
Angela W
AW
Tang
D000328:Adult; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D017714:Community-Acquired Infections / Q000188:drug therapy / Q000382:microbiology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D016106:Methicillin Resistance; D049590:Postpartum Period; D016659:Psoas Abscess / Q000188:drug therapy* / Q000382:microbiology; D052880:Pyomyositis / Q000188:drug therapy* / Q000382:microbiology; D013203:Staphylococcal Infections / Q000188:drug therapy* / Q000382:microbiology; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000302:isolation & purification; D013420:Sulfamethoxazole / Q000627:therapeutic use; D016896:Treatment Outcome; D014295:Trimethoprim / Q000627:therapeutic use; D014640:Vancomycin / Q000627:therapeutic use
D000900:Anti-Bacterial Agents; D014640:Vancomycin; D014295:Trimethoprim; D013420:Sulfamethoxazole