These authors detail the treatment of a rare case of drug-induced neutropenia and fever in a patient who was using vancomycin for infection following an ankle fracture. 

Drug-induced neutropenia  is a medical condition resulting in a decreased absolute neutrophil count (ANC) 1-3 A normal ANC ranges between 1,700 to 7,000/µL.^1–3 One can calculate this by multiplying the white blood cell (WBC) count (normal range between 4,500 to 10,500 cells/mm³) by the percent of neutrophils in the blood.