RESUMEN
<p><b>OBJECTIVE</b>To explore the effect of Jiawei Yupingfeng Powder (JYP) on T-lymphocyte subsets in patients with senile chronic bronchitis in acute onset stage (SCB-AOS).</p><p><b>METHODS</b>Patients were divided, according to the randomized controlled principle, into two groups, the 44 patients in the treated group and the 40 in the control group. The conventional western medicinal therapy was given to both groups, but to the treated group, JYP was administered additionally. The therapeutic course to them was 14 days. Changes of CD3, CD4, CD8 and the ratio of them were observed.</p><p><b>RESULTS</b>Increase of CD3, CD4 and CD4/CD8 (P < 0.05) and decrease of CD8 (P < 0.01) were significantly shown in the treated group after treatment, but no change in the control group. Besides, comparison of the total effective rate in the two groups also showed significant difference (P < 0.05).</p><p><b>CONCLUSION</b>Cellular immune function disturbance exists in patients with SCB-AOS, JYP could enhance the efficacy by way of modulating cellular immune function.</p>