• Choon Chiat Oh, Henry Chung Hung Ko, Haur Yueh Lee, Nasia Safdar, Dennis G Maki, and Maciej Piotr Chlebicki.
• Department of Dermatology, Singapore General Hospital, Singapore. Electronic address: oh.choon.chiat@sgh.com.sg.
• J. Infect. 2014 Jul 1;69(1):26-34.

ImportanceA significant proportion of patients who have had a first episode of erysipelas or uncomplicated cellulitis will subsequently develop a recurrence. There is disagreement about how effective antibiotic prophylaxis is for preventing recurrent cellulitis.ObjectiveTo determine if antibiotic prophylaxis is effective in preventing recurrent cellulitis compared to no prophylaxis using a systematic review and meta-analysis.Data SourcesStudies in any language identified by searching Medline, EMBASE, Cochrane Library, CINAHL, TRIP database, clinical practice guidelines websites, and ongoing trials databases up to 31st August 2012. Search terms included cellulitis, erysipelas, controlled clinical trial, randomized, placebo, clinical trials, randomly, and trial.Study SelectionOnly controlled trials comparing antibiotic prophylaxis to no antibiotic prophylaxis in patients age 16 years and above, and after 1 or more episodes of cellulitis, were included.Data Extraction And SynthesisIndependent extraction of articles was done by 2 investigators using predefined data extraction templates, including study quality indicators. PROSPERO registration number: CRD42012002528. Meta-analyses were done using random-effects models.Main Outcomes And MeasuresThe primary outcome was the number of patients with a recurrence of cellulitis. Secondary outcomes were (1) the time to next episode of recurrence, (2) quality of life measures, and (3) adverse events (e.g. allergic reactions, nausea).ResultsFive randomized controlled trials (n = 535), with 260 patients in the intervention arm and 275 in the comparator group met our inclusion criteria. 44 patients (8%) in the antibiotic prophylaxis group and 97 patients (18%) in the comparator group had an episode of cellulitis. Antibiotic prophylaxis significantly reduced the number of patients having recurrent cellulitis, with a risk ratio (RR) of 0.46 (95% CI 0.26-0.79). None of the studies reported severe adverse effects to antibiotics. There was methodological heterogeneity amongst the studies in terms of types of antibiotic used, delivery modes, number of recurrences of cellulitis at study entry, and study quality.Conclusion And RelevanceAntibiotic prophylaxis can prevent recurrent cellulitis. Future research should aim to identify the ideal type, dosage, and duration of antibiotics for prophylaxis, as well as to identify the group of patients who will benefit most from antibiotic prophylaxis.Copyright © 2014 The British Infection Association. Published by Elsevier Ltd. All rights reserved.

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