且兰

早上7∶50~8∶20，楼内的空气细菌浓度最高，且革兰阳性菌比例大于革兰阴性菌；

The maximal concentration of airborne bacteria was observed at AM 7 ∶ 50-8 ∶ 20 . And the percentage of the Gram-positive bacteria was higher than the Gram-negative one .

分离出的184株致病菌中革兰阴性杆菌占60.22%，其中非发酵革兰阴性杆菌占45.53%，且非发酵革兰阴性杆菌对常用抗生素的耐药率高；

Gram negative bacilli accounted for 60.87 % among 184 strains of bacteria in which 45.53 % were non-fermentation Gram negative bacilli . Drug sensitivity test results showed that resistance to various antibiotics was highest in non-fermentation gram negative .