Fast Five Quiz: Cellulitis

Mary L. Windle, PharmD


May 22, 2023

The most common bacteria causing cellulitis are Streptococcus pyogenes, other beta-hemolytic streptococci, and S aureus. Methicillin-resistant S aureus is most common in abscesses. When skin infection is present with drainage, abscess, eschar, and/or penetrating trauma, methicillin-resistant S aureus is the most likely cause. When those features are absent, S pyogenes or other beta-hemolytic streptococci are more likely the cause. P aeruginosa is most likely to cause cellulitis in immunocompromised hosts. Cellulitis from S typhimurium is rare and is often secondary to other serious issues. 

Learn more about cellulitis.


Comments on Medscape are moderated and should be professional in tone and on topic. You must declare any conflicts of interest related to your comments and responses. Please see our Commenting Guide for further information. We reserve the right to remove posts at our sole discretion.