• Fernando M de Benedictis, Ines Carloni, and Roberto Guidi.
• Salesi Children's Hospital Foundation, Ancona, Italy. Electronic address: pediatria@fmdebenedictis.it.
• Paediatr Respir Rev. 2020 Feb 1; 33: 30-34.

AbstractAcute wheezing episodes are frequent in young children and are associated with high morbidity and healthcare utilization. The role of respiratory viruses in triggering acute wheezing is well known. There is also accumulating evidence that airway bacteria, either alone or as part of bacteria-virus interaction, are important determinants of acute asthma exacerbations. Targeting airway bacteria with antibiotics to reduce the severity of acute wheezing episodes and prevent recurrent wheezing among preschool children has been recently evaluated in three randomized, double-blind, placebo-controlled trials. The results of these studies are controversial. An interventional approach with azithromycin in young children during acute wheezing episodes cannot be generically incorporated into clinical practice, due to the potential consequences of widespread use of antibiotics in such a common clinical setting. This intervention may be reserved for children with really severe, recurrent wheezing episodes. Future research should focus on risk factors that facilitate acquisition of bacterial airway infection in young children and better understanding how virus and bacteria interact with each other during wheezing attacks. Identifying objective biomarkers that may direct the treatment to specific groups of children may represent a significant step forward in the clinical approach of acute wheezing.Copyright © 2019 Elsevier Ltd. All rights reserved.

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