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To analyze the antimicrobial sensitivity against clinical isolates in the first affiliated hospital of air force medical university in the past three years.
The nonduplicate clinical isolates were collected in 2021—2023, identification and drug sensitivity test were performed by using VITEK2-compact automatic bacteria identification system. The data was analyzed using WHONET 5.6 software and interpreted according to the Clinical and Laboratory Standards Institute (CLSI) 2023 breakpoints.
A total of 20 536 clinical isolates were collected, of which 28.78% were gram-positive, 58.64% were gram-negative, 11.94% were fungi and 0.64% were anaerobe. The prevalence of methicillin-resistant strains in Staphylococcus aureus and coagulase-negative Staphylococcus were 49.11% and 73.06%, respectively. No Staphylococcus resistant to vancomycin, linezolid, or tigecycline was detected. The resistance rates of Enterococcus faecium to most antimicrobial agents were much higher than Enterococcus faecalis. 8 strains of vancomycin-resistant Enterococcus faecium were isolated, and a few linezolid-resistant strains were identiffed in both species. The prevalence of penicillin-susceptible Streptococcus pneumoniae (PSSP) was 95.85%. The resistance rate to carbapenems was 0.2% to 12.8% in Enterobacterales species, and the detection rate of carbapenem-resistant Enterobacteriaceae (CRE) was 6.6%, with Klebsiella pneumoniae accounting for 66.53%. The resistance rates of Acinetobacter spp to imipenem and meropenem were 75.3% and 76.7%, respectively. Meanwhile, the rates of Pseudomonas aeruginosa were 22.9% and 19.9% respectively.
The antimicrobial resistance of clinical isolates in our hospital is still serious. All relevant departments should strengthen the monitoring of bacterial resistance in order to curb the development and spread of bacterial resistance.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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