In a 17-year-old male patient with acute lymphoblastic leukaemia, who was being treated with chemotherapy, a Staphylococcus epidermidis infection with several septicaemias developed during a period of protracted neutropenia. The patient was treated with vancomycin and fusidic acid, but blood cultures remained positive. The patient also developed staphylococcal meningitis. After the antibiotic regimen was supplemented by fosfomycin, the blood cultures became sterile. Combination treatment with vancomycin and fosfomycin was continued for two months without apparent toxicity. In individual cases of infection with multiresistant S. epidermidis fosfomycin may be included in the antibiotic regimen. This is the first report of parenteral use of fosfomycin in the Netherlands.