本文报道了特美汀针剂治疗下呼吸道感染的疗效观察。结果表明，治愈１０４例，显效１８例，有效率为９３．８％，其中轻、中度感染有效率达１００％，重症感染为９０．７％。痰菌药敏试验敏感率为９１．９％，疗程结束时细菌清除率为８９．５％，未发现毒副作用。这说明特美汀具有高效、广谱、耐酶、低毒特性。 This article reports the clinical effects of Cemetinoin in the treatment of lower respiratory tract infections. The results showed that 104 cases were cured, 18 cases were markedly effective, and the effective rate was 93.8%. The effective rate of mild and moderate infection was 100% and severe infection was 90.7%. Susceptibility to sputum susceptibility test was 91.9%, bacterial clearance rate was 89.5% at the end of treatment, no side effects were found. This shows that timentin has high efficiency, broad spectrum, resistance to enzymes, low toxicity.