Impact of Systemic Antibiotics on Staphylococcus aureus Colonization and Recurrent Skin Infection

Patrick G. Hogan, Marcela Rodriguez, Allison M. Spenner, Jennifer M. Brenneisen, Mary G. Boyle, Melanie L. Sullivan, Stephanie A. Fritz

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Background Staphylococcus aureus colonization poses risk for subsequent skin and soft tissue infection (SSTI). We hypothesized that including systemic antibiotics in the management of S. aureus SSTI, in conjunction with incision and drainage, would reduce S. aureus colonization and incidence of recurrent infection. Methods We prospectively evaluated 383 children with S. aureus SSTI requiring incision and drainage and S. aureus colonization in the anterior nares, axillae, or inguinal folds at baseline screening. Systemic antibiotic prescribing at the point of care was recorded. Repeat colonization sampling was performed within 3 months (median, 38 days; interquartile range, 22-50 days) in 357 participants. Incidence of recurrent infection was ascertained for up to 1 year. Results Participants prescribed guideline-recommended empiric antibiotics for purulent SSTI were less likely to remain colonized at follow-up sampling (adjusted hazard ratio [aHR], 0.49; 95% confidence interval [CI],.30-.79) and less likely to have recurrent SSTI (aHR, 0.57; 95% CI,.34-.94) than those not receiving guideline-recommended empiric antibiotics for their SSTI. Additionally, participants remaining colonized at repeat sampling were more likely to report a recurrent infection over 12 months (aHR, 2.37; 95% CI, 1.69-3.31). Clindamycin was more effective than trimethoprim-sulfamethoxazole (TMP-SMX) in eradicating S. aureus colonization (44% vs 57% remained colonized, P =.03) and preventing recurrent SSTI (31% vs 47% experienced recurrence, P =.008). Conclusions Systemic antibiotics, as part of acute SSTI management, impact S. aureus colonization, contributing to a decreased incidence of recurrent SSTI. The mechanism by which clindamycin differentially affects colonization and recurrent SSTI compared to TMP-SMX warrants further study.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalClinical Infectious Diseases
Volume66
Issue number2
DOIs
StatePublished - Jan 15 2018

Keywords

  • SSTI
  • Staphylococcus aureus
  • colonization
  • systemic antibiotics

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