title: Septic arthritis of the knee due to Clostridium welchii. Report of two cases.
mesh_terms: D001170:Arthritis, Infectious / Q000175:diagnosis* / Q000382:microbiology / Q000628:therapy; D002648:Child; D002675:Child, Preschool; D003015:Clostridium Infections / Q000175:diagnosis* / Q000628:therapy; D003016:Clostridium perfringens; D006801:Humans; D007719:Knee Joint; D008297:Male; D010406:Penicillins / Q000627:therapeutic use
chemical_list: D010406:Penicillins