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Efficacies of amoxicillin (AMX) given at 200 mg/kg b.i.d., amoxicillin-clavulanate (AMX/CA) given at 200 plus 50 mg/kg, respectively, b.i.d., azithromycin (AZI) given at 20 and then 10 mg/kg o.d., and clarithromycin (CLA) given at 20 mg/kg b.i.d. against respiratory tract infection in rats caused by S. pneumoniae 1629. Each circle represents an animal. Closed circles represent animals that died before the end of the study.
