blood disorders
Neutropenia
Severity of neutropenia
The typical lower limit of the neutrophil count is about 1500 cells per microliter of blood (1.5 × 109cells per liter). As the count goes below this level, the risk of infection increases. Neutropenia severity is classified as: Mild: 1000 to 1500/mcL (1 to 1.5 × 109/L) Moderate: 500 to 1000/mcL (0.5 to 1 × 109/L) Severe: below 500/mcL (0.5 × 109/L) When the neutrophil count falls below 500 cells per microliter (severe neutropenia), the risk of infection increases greatly. People may even develop infections by the bacteria that normally live harmlessly in the mouth and intestine. 