PT - JOURNAL ARTICLE AU - Leticia Vila AU - Vanesa Garcia AU - Oihana Martinez Azcona AU - Loreley Pineiro AU - Angela Meijide AU - Vanesa Balboa TI - Mild to moderate hypersensitivity reactions to beta-lactams in children: a single-centre retrospective review AID - 10.1136/bmjpo-2019-000435 DP - 2019 Apr 01 TA - BMJ Paediatrics Open PG - e000435 VI - 3 IP - 1 4099 - http://bmjpaedsopen.bmj.com/content/3/1/e000435.short 4100 - http://bmjpaedsopen.bmj.com/content/3/1/e000435.full SO - BMJ Paediatrics Open2019 Apr 01; 3 AB - Objective Beta-lactam (BL) antibiotics are the most reported drugs in hypersensitivity reactions in children. More than 90% of these children tolerate the suspected drug after diagnostic work-up. Skin tests (STs) show low sensitivity. Our aim was to assess the performance of drug provocation tests (DPTs) without previous ST in mild and moderate delayed reactions and to propose a new DPT protocol.Design of the study Charts from 213 children under 15 years of age referred for suspected BL allergy from 2011 to 1013 were reviewed. Prick, intradermal and patch tests were performed with major determinant penicilloyl-polylysine, minor determinant mixture, amoxicillin (AMX), cefuroxime, penicillin G and AMX–clavulamate. Children with negative skin tests underwent DPT. After an initial full dose of antibiotic, DPT was carried on for 3 days at home in patients reacting within the first 3 days of treatment. If the reaction took place from day 4 on of treatment, patients took the antibiotic for 5 days.Results We included 108 girls and 105 boys. Mean age at the time of reaction was 3.66±3.06 years. 195 patients (91.5%) reacted to one BL. 154 reactions (67.2%) were non-immediate. Mild to moderate skin manifestations were most frequently reported. AMX–clavulanate was the most frequently involved (63.4%). DPT confirmed the diagnosis of drug hypersensitivity in 17 (7.3%) cases. These 17 patients had negative ST.Conclusion In mild and moderate cases of BL hypersensitivity, diagnosis can be performed by DPT without previous ST