RT Journal Article SR Electronic T1 Vancomycin-induced neutropenia JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 39 OP 40 VO 132 IS 1 A1 Mackett, R. L. A1 Guay, D. R. YR 1985 UL http://www.cmaj.ca/content/132/1/39.abstract AB Although rare, neutropenia associated with long-term vancomycin therapy may occur. A 67-year-old woman with cellulitis and sepsis caused by Staphylococcus aureus was treated initially with cefazolin. Despite in-vitro susceptibility of the organism to this drug, the patient remained febrile, and therapy was changed to vancomycin. On day 17 of therapy with this medication neutropenia was noted; it progressed over the next 3 days, and therapy with the drug was stopped. A rise in the neutrophil count occurred within 5 days of discontinuation. Periodic monitoring of the leukocyte count during longterm vancomycin therapy is recommended.