Treatment of spreading streptococcal cellulitis is-
**Core Concept**
Spreading streptococcal cellulitis is a bacterial infection caused by Group A beta-hemolytic Streptococcus (GABHS), characterized by rapid progression of skin inflammation and potential life-threatening complications if not promptly treated. The treatment involves addressing the bacterial infection, managing symptoms, and preventing complications.
**Why the Correct Answer is Right**
The correct treatment for spreading streptococcal cellulitis involves administering antibiotics that effectively target GABHS. Penicillin G (intravenous) or ampicillin/sulbactam (intravenous) are preferred choices due to their ability to penetrate into tissues and achieve high concentrations in the bloodstream. These antibiotics inhibit cell wall synthesis by binding to penicillin-binding proteins (PBPs), ultimately leading to bacterial cell lysis and death. Additionally, patients may require hospitalization for close monitoring, wound care, and potential surgical interventions.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because erythromycin, a macrolide antibiotic, is not the first-line treatment for GABHS infections, as it may not achieve adequate tissue concentrations.
**Option B:** This option is incorrect because vancomycin, a glycopeptide antibiotic, is typically reserved for methicillin-resistant Staphylococcus aureus (MRSA) infections or in cases of penicillin allergy.
**Option C:** This option is incorrect because cephalexin, a first-generation cephalosporin, has limited activity against GABHS and may not be effective in treating spreading cellulitis.
**Clinical Pearl / High-Yield Fact**
When treating streptococcal infections, it is essential to note that patients may become carriers of the bacteria, even after apparent resolution of symptoms. To prevent transmission, it is crucial to educate patients on proper hygiene practices and consider prophylactic antibiotics for close contacts.
**Correct Answer:** D. Penicillin G (intravenous)