• Eman Ansari, Marvin B Harper, Assaf Landscahft, Rotem Kimia, Alex Lynn, Al Ozonoff, and Amir A Kimia.
• Boston Children's Hospital, Department of Emergency Medicine, United States of America.
• Am J Emerg Med. 2021 Mar 1; 41: 193-196.

BackgroundLimited data exist regarding the presentation and bacteriology of nonneonatal pediatric breast abscess.ObjectiveTo determine the bacteriology and characteristic presentation of pediatric breast abscesses in a tertiary care center.MethodsCross-sectional study of patients age 1 month to 21 years admitted to a pediatric Emergency Department (ED) between 1996 and 2018 with a breast abscess. Patients with pre-existing conditions were excluded. Records were reviewed to determine demographics, history, physical exam findings, wound culture results, imaging and ED disposition. We used descriptive statistics to describe prevalence of different bacteria.ResultsWe identified 210 patients who met study criteria. Median age was 13.6 years [IQR 6.6, 17.4], and 91% (191/210) were females. Ninety-two patients (43.8%) were 'pre-treated' with antibiotics prior to ED visit, and 33/210 (16%) were febrile. Ultrasound was obtained in 85 patients (40.5%), 69 patients had a single abscess and 16 had multiple abscesses. Most patients were treated with antibiotics and 100 had a surgical intervention, of these 89 had I&D and 11 a needle aspiration. Admission rate was 45%. Culture results were available for 75 (75%). Thirty-three (44%) had a negative culture, or grew non-aureus staphylococci or other skin flora. Culture were positive for MSSA 21 (28%), MRSA 13 (17%), Proteus mirabilis 2 (2.6%), Serratia 1 (1.3%). Other organisms include Gram-negative bacilli, group A Streptococcus and enterococcus.ConclusionsNon-neonatal pediatric breast abscess bacteriology is no different than data published on other skin abscesses. MRSA coverage should be considered based on local prevalence in skin infections.Copyright © 2020 Elsevier Inc. All rights reserved.

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