一般原因是：
A low white blood cell count usually is caused by one of the following:
- Viral infections that temporarily disrupt bone marrow function 病毒感染暂时影响骨髓造血机能
- Congenital disorders characterized by diminished bone marrow function先天性骨髓功能异常
- Cancer or other diseases that damage bone marrow 癌症或其他疾病损伤了骨髓
- Autoimmune disorders that destroy white blood cells or bone marrow cells自体免疫性疾病攻击白血球或骨髓
- Overwhelming infections that use up white blood cells faster than they can be produced大规模感染大量消耗白血球
- Drugs that destroy white blood cells or damage bone marrow药物杀伤白血球或损伤骨髓
Specific causes of low white blood cell count include:特殊原因有
- Aplastic anemia 先天再生障碍贫血
- Certain medications, such as antibiotics and diuretics 某些药物的影响，例如抗生素和利尿剂
- Chemotherapy化疗
- HIV/AIDS艾滋病毒感染
- Hypersplenism, a premature destruction of blood cells by the spleen脾功能亢进
- Infectious diseases细菌感染
- Kostmann's syndrome, a congenital disorder involving low neutrophil production先天性中性粒细胞减少症
- Leukemia白血病
- Lupus红斑狼疮
- Malnutrition营养不良
- Myelodysplastic syndromes 骨髓增生异常综合症
- Myelokathexis, a congenital disorder involving failure of neutrophils to enter the bloodstream 先天性骨髓粒细胞减少症
- Other autoimmune disorders 其他自体免疫异常
- Other congenital disorders 其他先天性疾病
- Parasitic diseases 寄生虫病
- Radiation therapy 放疗
- Vitamin deficiencies 维生素缺乏
