据美国一项调查 ,青少年及成人患百日咳的发病率比通常认为的要高得多。该调查为期 2年。研究者对 2 1 2名 1 0～4 9岁患急性阵发性痉挛性咳嗽 (咳嗽时气急、呼吸困难 )及长期咳嗽者 (大于 7～ 34d)进行了调查。实验室检查发现 ,百日咳阳性率为 1 3% ,其中约 1 /3(总 4 % )为临 According to a US survey, the incidence of whooping cough among adolescents and adults is much higher than commonly thought. The survey lasted for 2 years. The investigators investigated 214 patients with acute paroxysmal sputum cough (coughness and difficulty breathing during cough) and long-term cough (greater than 7 to 34 days) aged 10 to 49 years. Laboratory tests found that the positive rate of whooping cough was 13%, of which about 1/3 (4% of the total) was