我国医院获得性肺炎（ＨＡＰ）居院内感染的首位，内科或呼吸病区发病率为３—４％，而ＩＣＵ则高达１５％以上［２］。可见ＨＡＰ已成为临床上十分严重的问题。尽管ＨＡＰ的诊断技术近年来已取得了重大进展，但在许多情况下，及时和准确地检出致病菌仍然比较困难。当未获... In our country hospital-acquired pneumonia (HAP) in-hospital infection in the first place, medical or respiratory ward incidence of 3-4%, while the ICU is as high as 15% or more [2]. Visible HAP has become a very serious clinical problem. Although significant advances have been made in HAP diagnostic technology in recent years, in many cases it is still more difficult to detect pathogens in a timely and accurate manner. When not ...