II. Pathophysiology
- Infection is most common cause of acquired Neutropenia
- Infectious Neutropenia is often via marrow injury
- Granulomatous infections infiltrate marrow
III. Causes: Severe Neutropenia
- Bacterial Sepsis (especially Gram Negative Bacteria)
- Infectious Mononucleosis
- Hepatitis B Virus
- Human Immunodeficiency Virus (HIV)