FCGR1A and infection: Consequently, several recent reports indicated that the neutrophil CD64 is a sensitive and specific marker of systemic infection and local infection [1, 2, 6, 8–11]: Matsui et al. [1] reported that a cutoff value for CD64 for distinguishing systemic infection was 2,000 molecules/cell, and Tanaka et al. [2] showed that CD64 levels in patients with musculoskeletal local infection were significantly higher than those in patients without infection.