The aim of the study was to evaluate the impact of a multifaceted antimicrobial stewardship intervention on antibiotic consumption in a primary health care (PHC) area in Spain. Quasi-experimental study conducted in a PHC area with nine PHC centers, a 400-bed acute care teaching hospital, and 18 nursing homes serving a population of 260,561. The intervention was based on the 2016 CDC Core Elements of Outpatient Antibiotic Stewardship publication and targeted 130 PHC physicians, 41 PHC pediatricians, 19 emergency physicians, and 18 nursing home physicians. The components were commitment, actions for improving antibiotic prescribing, tracking and feedback, and education and experience. The primary outcome was overall antibiotic consumption. Secondary outcomes were consumption of antibiotics to treat pharyngotonsillitis, acute otitis media, acute sinusitis, acute bronchitis, and urinary tract infection (UTI), percentage of patients treated with specific antibiotics, and dispensing costs. Consumption was measured in defined daily doses per 1,000 inhabitants per day (DID) and compared pre-and postintervention (2016 vs. 2018). Overall antibiotic consumption decreased from 16.01 to 13.31 DID (−16.85%). Consumption of amoxicillin/clavulanic acid and quinolones decreased from 6.04 to 4.72 DID (−21.88%) and 1.64 to 1.23 DID (−25.06%), respectively. The percentage of patients treated with antibiotics decreased from 26.99 to 22.41%. The intervention resulted in cost savings of €72,673. Use of antibiotics to treat pharyngotonsillitis, UTI, and acute otitis media, sinusitis, and bronchitis decreased significantly. Our antimicrobial stewardship program led to a decrease in antibiotic consumption and significantly improved the use of antibiotics for the most prevalent PHC infections.

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One of the critical elements of antimicrobial stewardship programs is the ability to measure the quality of antibiotic prescriptions. The aims of the present study were to evaluate the performance properties of a set of previously developed quality indicators (QIs) and to identify the potential room for improvement in antibiotic use in our setting. A monthly cross-sectional point prevalence survey was conducted in a 400-bed acute care teaching hospital, from June to November 2015. All adult patients treated for ≥24 hours with antibiotic therapy for a suspected hospital- or community-acquired bacterial infection were included. Performance scores (adherence, room for improvement, interobserver reliability, and applicability) were calculated for 8 QIs. A total of 362 patients were evaluated. Adherence to the whole set of QIs was accomplished for 14.1% of evaluable patients. The QIs with greater room for improvement were adequate request for blood cultures (60.6%), therapeutic drug monitoring (TDM) (59.1%), sequential antibiotic therapy within 72 hours (48.2%), and empirical antibiotic therapy according to local guidelines (30.4%). The percentage of patients receiving unnecessary antibiotic treatment in the absence of clinical or microbiological evidence of infection after 5 days was 12.2%. All indicators scored kappa values of ≥0.6, suggesting good interobserver reliability. Low applicability (6.1% of reviewed patients) was found only for the TDM QI. The QIs analyzed were found to be applicable, showed good interobserver reliability, and were useful tools to identify areas with potential room for improvement in antibiotic use.

Some patients in the community receive a high burden of antibiotics. We aimed at describing the characteristics of these patients, antibiotics used, and conditions for which they received antibiotics. We carried out a cross‐sectional study. Setting: Thirty Health Primary Care Areas from 12 regions in Spain, covering 5,960,191 inhabitants. Patients having at least 30 packages of antibacterials for systemic use dispensed in 2017 were considered. Main outcome measures: Prevalence of antibiotic use, conditions for which antibiotics were prescribed, clinical characteristics of patients, comorbidities, concomitant treatments, and microbiological isolates. Patient’s average age was 70 years; 52% were men; 60% smokers/ex‐smokers; 54% obese. Overall, 93% of patients had, at least, one chronic condition, and four comorbidities on average. Most common comorbidities were cardiovascular and/or hypertension (67%), respiratory diseases (62%), neurological/mental conditions (32%), diabetes (23%), and urological diseases (21%); 29% were immunosuppressed, 10% were dead at the time of data collection. Patients received three antibiotic treatments per year, mainly fluoroquinolones (28%), macrolides (21%), penicillins (19%), or cephalosporins (12%). Most frequently treated conditions were lower respiratory tract (infections or prophylaxis) (48%), urinary (27%), and skin/soft tissue infections (11%). Thirty‐five percent have been guided by a microbiological diagnosis, being Pseudomonas aeruginosa (30%) and Escherichia coli (16%) the most frequent isolates. In conclusion, high antibiotic consumers in the community were basically elder, with multimorbidity and polymedication. They frequently received broad‐spectrum antibiotics for long periods of time. The approach to infections in high consumers should be differentiated from healthy patients receiving antibiotics occasionally.