The main of this study is to identify and record cases of invasive and severe infections due to Streptococcus pyogenes. In order to evaluate the incidence of severe forms of disease and the possible contributing factors, and to optimize their management.~Admitted patients to intensive care or critical care units in reported via Santé Publique France may also be included in this study.~Secondly, epidemiological, clinical, bacteriological data of all severe or not cases, of group A Streptococcal infections will be compiled to describe their characteristics, and try to explain this recrudescence as well as possible.
This study is observational, retrospective and prospective study in pediatric patients hospitalized with invasive streptococcal A infection