-Is a surgical emergency. Call surgery ASAP.
-Broad antimicrobial therapy: Pip/Tazo (gram negatives/anaerobes) + Vancomycin (MRSA) + Clindamycin (group A strep)
Clinda reduces toxin production by Group A Strep.
Important links
Reference
https://www.cdc.gov/features/necrotizingfasciitis/index.html