本文观察了吸烟对外周血中白细胞和单核细胞数的影响。以282人为调查对象,年龄20～69岁,其中吸烟组108名,不吸烟组174名。用单克隆抗体和流动细胞计数器测定白细胞总数及T淋巴细胞亚群。结果表明:1.吸烟组较不吸烟组白细胞总数明显增加(吸烟组8.50±0.15个/mm~3,不吸烟组7.33±±0.12个/mm~3,P≤0.0001)。除嗜酸细胞百分比轻度增加(吸烟组2.3%,不吸烟组1.9%,P=0.003)外,两组的白细胞百分比无明显差异。2.吸烟组CD_4阳性细胞(辅助性T淋巴细胞)轻度增加(吸烟组55.3±0.8%,不吸烟组52.2±0.6%,P=0.002)。CD_4阳性 This article examined the effects of smoking on the number of leukocytes and monocytes in peripheral blood. A total of 282 people aged 20-69 were enrolled, including 108 smokers and 174 smokers. The total number of leukocytes and T lymphocyte subsets were determined by monoclonal antibodies and flow cytometry. The results showed that: 1. The total number of leukocytes in smoking group was significantly increased (8.50 ± 0.15 / mm ~ 3 in smoking group, 7.33 ± 0.12 in non-smoking group / mm ~ 3, P≤0.0001). There was no significant difference in the percentage of leukocytes between the two groups, except for mild increases in the percentage of eosinophils (2.3% in the smoking group, 1.9% in the non-smoking group, P = 0.003). The smoking group CD_4 positive cells (helper T lymphocytes) increased slightly (smoking group 55.3 ± 0.8%, non-smoking group 52.2 ± 0.6%, P = 0.002). CD_4 positive