Analysis of pathogenic strains and distribution of blood culture microorganism in a second grade hospital
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摘要: 目的 探析血培养微生物检验的病原菌株分布情况与耐药性,为有效控制血流感染的发生与传播提供参考依据。 方法 选取玉环市人民医院2018年7月—2019年6月的4 790例住院患者,采集其血样4 790份并送检,运用法国梅里埃公司BACT/ALERT 3D型全自动血培养仪及其配套培养瓶进行血培养,阳性株及时进行涂片与转种,并应用VITEK-2COMPACT全自动微生物分析系统进行菌种鉴定及药物敏感试验,对分离出的细菌菌种与耐药性进行分析。 结果 4 790份血样中,共分离出病原菌523株(10.92%),包括革兰阴性菌283株(54.11%),革兰阳性菌230株(43.98%),真菌8株(1.53%),厌氧菌2株(0.38%)。病原菌的科室分布主要为重症监护病房(25.81%)、普外科(22.75%)、感染科(13.77%)。革兰阴性菌与革兰阳性菌的耐药性差异均较大;大肠埃希菌和肺炎克雷伯菌对氨苄西林耐药性高(>82.00%),对亚胺培南耐药性低(<5.00%),鲍曼不动杆菌对呋喃妥因、氨苄西林、氨曲南、头孢唑林的耐药性高(100.00%),对妥布霉素的耐受性低(27.27%);革兰阳性菌对红霉素及青霉素的耐药性普遍较高(>76.00%),对利奈唑胺及万古霉素无耐药(均为0.00%)。 结论 血培养微生物检验的病原菌株种类多、科室分布广,耐药情况严峻,临床医生应更加关注血培养微生物检验的病原菌株早期检测及耐药性分析结果,以改善临床诊断及抗菌药物的应用。Abstract: Objective To explore the distribution and drug resistance of pathogenic bacteria in blood culture microorganism test, so as to provide reference for effective control of the occurrence and spread of blood stream infection. Methods A total of 4 790 inpatients in Yuhuan People's Hospital from July 2018 to June 2019 were selected, 4 790 blood samples were collected and sent for examination. BacT/Alert was used 3 D type automatic blood culture instrument and its supporting culture bottle were used for blood culture, and positive strains were smeared and transferred in time. Vitek-2 compact automatic microbial analysis system was used for strain identification and drug sensitivity test, and the isolated bacterial strains and drug resistance were analyzed. Results In 4 790 blood samples, 523 pathogenic bacteria were isolated, the positive rate was 10.92%, including 283 gram-negative bacteria(54.11%), 230 gram-positive bacteria(43.98%), 8 fungi(1.53%), and 2 anaerobes(0.38%). The distribution of pathogenic bacteria was mainly in ICU(25.91%), general surgery(22.75%), and infection department(13.77%). The drug resistance of gram-negative bacteria and gram-positive bacteria were significantly different. The resistance of Escherichia coli and Klebsiella pneumoniae to ampicillin was high(>82.00%), to imipenem was low(<5.00%). The resistance of Acinetobacter baumannii to furantoin, ampicillin, aztreonam, and cefazolin were high(100.00%), and to tobramycin was low(27.27%). The resistance of gram-positive bacteria to erythromycin and penicillin were generally high(>76.00%), but not resistant to linezolid and vancomycin(all 0.00%). Conclusion There are many kinds of pathogenic strains in the blood culture microorganism test, the departments are widely distributed, and the situation of drug resistance is severe. Clinicians should pay more attention to the results of early detection and drug resistance analysis of pathogenic strains in blood culture microorganism test, so as to improve clinical diagnosis and application of antibiotics.
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Key words:
- Blood culture /
- Microbiological examination /
- Pathogenic strains /
- Distribution
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