In this randomised , controlled , non-inferiority trial , Indigenous Australian children aged @ months to @ years with purulent or crusted non-bullous impetigo were randomly assigned ( @:@:@ ) to receive benzathine benzylpenicillin ( weight-banded injection ) , twice-daily co-trimoxazole for @ days ( @ mg/kg plus @ mg/kg per dose ) , or once-daily co-trimoxazole for @ days ( @ mg/kg plus @ mg/kg per dose ) .