病原体变迁和多重耐药菌株的频繁出现使肺炎病原学诊断更为重要。但由于途径

The change of pathogens and the frequent appearance of multi-drug resistant strains make the pathogenic diagnosis of pneumonia more important. However, because the sputum passing through the oropharynx is contaminated by normal flora, a single ordinary sputum culture without screening is not reliable. Sputum smear microscopy is helpful for early diagnosis of pathogens, and can be used to eliminate “unqualified” sputum specimens with serious contamination of oropharyngeal flora and select “qualified” (25 squamous epithelial cells per low-power field, or Squamous epithelial cells; white blood cells

Pathogen changes and the frequent emergence of multiple drug-resistant strains make the diagnosis of pneumonia pathogens more important. However, because the cough sputum in the mouth and pharynx of the channel is contaminated by normal bacteria, the unfiltered single common sputum culture is not reliable. Sputum smear glasses can facilitate early initial pathogen diagnosis and can be used to remove "unqualified" sputum specimens contaminated with oral pharynx bacteria and select "qualified" (25 scaly endocal cells per low field of view, or scaly endocal cells; white blood cells).

病原体变迁和多重耐药菌株的频繁出现使肺炎病原学诊断更为重要。但由于途径口咽部的咳痰受正常菌群污染，未经筛选的单次普通痰培养不可靠。痰涂片镜检有助早期初步的病原诊断，并可借此剔除口咽部菌群污染严重的“不合格”痰标本而选取“合格”(每低倍视野鳞状上皮细胞25个，或鳞状上皮细胞；白细胞<br>