Cellulitis Treatment Guidelines

Introduction to Cellulitis Treatment

The Infectious Diseases Society of America (IDSA) recommends a 5-day course of antimicrobial therapy for cellulitis, with extension if clinical improvement has not occurred within this time period 1
For cellulitis, Rocephin (ceftriaxone) should be administered at 1-2 grams IV or IM once daily for 5 days, with extension if clinical improvement has not occurred within this time period 1

For cellulitis associated with penetrating trauma, evidence of MRSA infection elsewhere, nasal colonization with MRSA, injection drug use, or systemic inflammatory response syndrome (SIRS), consider adding coverage against MRSA 1
In severely compromised patients, broader antimicrobial coverage may be warranted 1
Elevation of the affected area and treatment of predisposing factors (such as edema or underlying cutaneous disorders) are important adjuncts to antibiotic therapy 1
For patients with recurrent cellulitis, addressing predisposing factors such as edema, obesity, eczema, venous insufficiency, and toe web abnormalities is crucial 1, 2

Outpatient therapy is recommended for patients who do not have systemic inflammatory response syndrome (SIRS), altered mental status, or hemodynamic instability 1
Hospitalization should be considered if there is concern for deeper or necrotizing infection, poor adherence to therapy, severe immunocompromise, or if outpatient treatment is failing 1

For patients with non-severe cellulitis, oral antibiotics targeting streptococci may be sufficient 1
In cases where both streptococcal and staphylococcal (including MRSA) coverage is needed, alternative or additional agents may be required 3
For patients with severe non-purulent cellulitis, vancomycin plus either piperacillin-tazobactam or imipenem/meropenem is recommended as empiric therapy 1