This patient has failed to respond to treatment with a cephalosporin. The culture shows methicillin-susceptible staphylococcus aureus. What is the appropriate next step?

#DERMATOLOGY
This patient has failed to respond to treatment with a cephalosporin. The culture shows methicillin-susceptible staphylococcus aureus. What is the appropriate next step?

A. IV Vancomycin
B. Oral doxycycline
C. Drainage of individual lesions
D. Oral sulfa drugs

 Ans: C ✔

This is methicillin-susceptible bacterial furuncle thus no indication for vancomycin. 
Bacterial furuncle represents small follicular abscesses. Appropriate treatment requires drainage. Antibiotics have little effect until appropriate drainage has been completed. Surface carriage may result in spreading of the infection to adjacent follicles and can be addressed by topical agents such as chlorhexidine.