目的 分析下肢慢性创伤性骨髓炎患者创面细菌培养分布情况，为临床用药提供依据。 方法 对2006年1月－2010年12月收治的91例慢性骨髓炎患者创面分泌物细菌培养标本结果进行回顾性调查分析。其中男78例，女13例；年龄5～78岁，平均41.3岁。病程47 d～7个月，平均68.6 d。使用抗生素总疗程均＞7 d。 结果 65例创面细菌培养阳性患者共分离出113株病原菌，其中G?菌72株，占63.71%；G+菌41株，占36.28%。药敏结果显示，G+菌对常规青霉素类基本耐药，碳青霉烯类耐药菌株少见，对万古霉素耐药菌株尚未出现。G?菌对青霉素类及头孢菌素类耐药较高，对头孢哌酮－舒巴坦无耐药。 结论 加强对慢性创伤性骨髓炎患者创面病原菌监测极为必要,对临床抗生素的合理使用具有一定的指导意义。Objective To analyze the distribution of cultured bacteria from chronic osteomyelitis patients, and provide a basis for clinical medicine. Methods We retrospectively analyzed the bacterial culture results of the secretions from 91 patients with chronic osteomyelitis treated in our hospital from January 2006 to December 2010. Among them, there were 78 males and 13 females aged from 5 to 78 years averaging at (41.3 ± 8.35) years. The duration of the disease ranged from 47 days to more than 7 months, averaging (68.6 ± 14.57) days. The total course of antibiotic-taking was longer than 7 days for all the patients. Results A total of 113 pathogen strains were isolated from 65 secretion samples, including 72 Gram-negative bacteria accounting for 63.71% and 41 gram-positive bacteria accounting for 36.28%. Drug susceptibility results showed basic resistance of Gram-positive bacteria to conventional penicillin, rare resistance to carbapenem, and no resistance to vancomycin. Gram-negative bacteria were basically resistant to penicillin and cephalosporins, but not resistant to cefoperazone-sulbactam. Conclusion Enhancing the monitoring of pathogens for patients with chronic osteomyelitis is extremely necessary for the rational clinical use of antibiotics.
【摘要】 目的 对季也蒙念珠菌感染患者的临床及微生物学特征进行分析，为临床诊治提供参考。 方法 收集2006年1月-2008年12月病原菌培养为季也蒙念珠菌的10例住院患者资料进行回顾性分析。 结果 季也蒙念珠菌感染患者存在多种基础疾病，大多数患者（8/10）有易感因素，其中7例使用广谱抗菌药物。10例中有8例为深部真菌感染。其临床表现与感染部位有关，主要累及泌尿道、呼吸道和皮肤软组织。多数深部感染患者（6/8）在感染前存在同部位细菌感染，部分患者（3/8）在相同部位还可分离出其他真菌。全部季也蒙念珠菌菌株对两性霉素B敏感，大多数菌株（9/10）对氟康唑敏感。仅1例患者因肺部感染、呼吸衰竭死亡，其余患者经氟康唑、伊曲康唑或特比萘芬等抗真菌药物治愈。 结论 季也蒙念珠菌感染多发生于有基础疾病、存在真菌易感因素者，感染部位多为原细菌感染部位，常合并其他细菌或真菌感染。部分菌株对氟康唑和伊曲康唑中敏或耐药，治疗应根据药敏进行选择。【Abstract】 Objective To analyze the clinical and microbiologic characters of candida guilliermondii to improve the clinical diagnosis and treatment. Methods The clinical data of 10 patients with candida guilliermondii infection diagnosed in our hospital from January 2006 to December 2008 were retrospectively analyzed. Results All the patients had several underlying conditions; eight patients had predisposing factors and seven patients were prescribed with broad-spectrum antibacterials. Eight patients had deep mycoses, whose clinical manifestation was associated with the infectious sites, mainly involved in urinary tract, respiratory tract and skin-soft tissues. Most deep mycoses (6/8) had prior bacterial infection at the candida guilliermondii infection site; some patients (3/8) had other fungous infection at the same time. All the strains were sensitive to amphotericin B; most fungous strains (9/10) were sensitive to fluconazole. One patient died of pulmonary infection and respiratory failure, and the others were cured by fluconazole, itraconazole or terbinafine. Conclusion Candida guilliermondii infection mainly occurs in patients with underlying conditions and predisposing factors. The infectious sites have prior bacterial infection and bacterial infection or fungous infection at the same time. Since some candida guilliermondii strains were not sensitive to fluconazole and itraconzole, drug sensitive test should be consulted.
Objective To explore the distribution of bacteria among community acquired lower respiratory tract infection (LRTI) inpatients with underlying chronic respiratory tract diseases.Methods The clinical data，sputum culture and drug susceptibility results of 212 community acquired LRTI patients who were hospitalized during the period 2001-2005 were retrospectively analyzed.All patients had various underlying chronic respiratory tract diseases.Results A total of 229 strains of pathogens were detected，with the majority being gram negative bacteria.In pathogens of acute exacerbation of chronic obstructive pulmonary disease，gram negative bacteria occupied 73.9%.And Pseudomonas aeruginosa and Klebsiella pneumoniae were the most common pathogens，with each occupying 18.2% and 13.6% respectively.Gram positive bacteria occupied 23.8%，mainly Staphylococcus aureus (10.2%) and Streptococcus pneumoniae (9.1%).In patients with bronchiectasis exacerbated by bacterial infection，86.2% were caused by gram negative bacteria，the top three being，in descending order，Pseudomonas aeruginosa (27.5%)，Haemophilus parainfluenzae (13.7%)，and Haemophilus influenzae (11.8%).Bronchiectasis was the major risk factor of getting Pseudomonas aeruginosa infection (OR=5.590，95%CI 2.792~11.192).The risk factors of getting Acinetobacter baumanii infection were antacid usage within 1 month (OR=9.652，95%CI 2.792~11.192) and hypoalbuminemia (OR=2.679，95%CI 1.108~6.476).For enterobacters infections，including Klebsiella pneumoniae，Enterobacter cloacae and Escherichia coli，the risk factors were antibiotic usage within 1 month (OR=4.236，95%CI 1.982~9.057)，having renal diseases (OR=4.305，95%CI 1.090~17.008) and diabetes mellitus (OR=2.836，95%CI 1.339~6.009).Conclusions Gram negative bacteria were the main pathogens of community acquired LRTI in hospitalized patients with underlying chronic respiratory tract diseases.The pathogens were influenced by underlying diseases，severity of diseases and drug usage history of patients.
Objective To analyze the clinical and etiological characteristics and bacterial susceptibility in patients with ventilator-associated pneumonia (VAP) in Guangzhou area.Methods A retrospective study was conducted on VAP patients in four hospital of Guangzhou from Jan 2004 to Oct 2005.Totally 157 patients were enrolled in this study，whose flora was identified and tested by Kirby Bauer disk diffusion susceptibility test.The univariate analysis method was used to analyze the prognostic parameters.Results The average onset time of VAP was 7.7 days after mechanical ventilation with a mortality rate of 38.2%.The proportion of Gram-negative bacilli，Gram-positive cocci and eumycete was 68.0%，23.4% and 8.7% respectively in 184 isolated strains.The most common pathogens were Pseudomonas aeruginosa (18.5%)，Stenotrophomonas maltophilia (14.1％)，Burkholderia cepacia (10.9%)，Staphylococcus aureus (10.3%) and Acinetobacter baumannii (8.7%).Pseudomonas aeruginosa，Stenotrophomonas maltophilia，and Acinetobacter baumannii were resistant to most common antibacterials such as cephalosporin and imipenem.18 strains oxacillin resistant Staphylococcus aureus，7 strains oxacillin resistant Staphylococcus simulans and one vancomycin resistant Staphylococcus aureus were isolated.Expect for vancomycin，teicoplanin and fusidic acid，the resistance of Gram-positive cocci were above 50% to other 9 antibacterials.Conclusions The antibiotic resistance situation of VAP in Guangzhou is very serious with high mortality.It is important to reinforce the prevention and guidance on the proper treatment of VAP.
Abstract: Objective To analyze the characteristics of pathogens isolated from patients with lung cancer after surgery, and provide instructions for the prevention and treatment of postoperative infection. Methods A retrospective investigation of the pathogenic microbiology data of 159 patients（142 males and 17 females with average age at 61.8±9.6 years) with lung cancer after surgery in West China Hospital from January 2009 to December 2011 was performed.We got the specimen from the patients by routine methods, identified the pathogens, and conducted drug susceptibility tests in vitro. Results The pathogens were mainly isolated from sputum of the patients （90.6%, 155/171）. Canidia albicans（25.7%, 44/171）, Klebsiella pneumonia（15.2%, 26/171）, Acinetobacter calcoaceticus-A. baumannii（13.4%, 23/171）and Pseudomonas aeruginosa（8.2%, 14/171） were the predominant species. Among A. calcoaceticus-A. baumannii isolates, 39.1%（9/23） of them were multidrug resistant strains. And 23.1%（6/26）of K. pneumonia isolates produced extended spectrum beta-lactamases. P. aeruginosa isolates showed high in vitro susceptibility to the antibacterial agents. Conclusion Pathogens are mainly isolated from sputum of patients after surgery for lung cancer. Canidia albicans and gram-negative bacilli are predominant isolates and should be the major targets for the prevention and treatment of postoperative infection.
Objective To study the distribution and drugresistance of pathogens isolated from patients who suffered from lower respiratory infections after thoracotomy and provide basis for rational use of antibiotics in clinical practice. Methods A total of 118 patients suffered from lower respiratory infections after thoracotomy in Beijing Lung Cancer Center and the Thoracic Surgery Department of Xuanwu Hospital between January 1,2006 and December 31, 2009. We performed a retrospective study on pathogens from their lower respiratory tract. Of these patients, 89 are male and 29 are female with a mean age of 64.6 years. Sputum specimens were obtained by sterile sputum collectors or bronchofibroscopes, and then were sent to microorganism laboratory immediately. Cytological screening was carried out before specimen inoculation. Bacterial culture, identification and drug sensitivity test were performed with routine methods. Results A total of 201 strains of pathogens from the lower respiratory tract were identified. There were 126(62.7%) strains of gramnegative bacilli, 66(32.8%) strains of grampositive cocci, and 9(4.5%) strains fungi. The four prevalent gramnegative bacilli strains with the highest isolating rate between 2006 and 2009 included 34(27.0%) strains of acinetobacters, 28(22.2%) strains of verdigris Pseudomonas, 19(15.1%) strains of Klebsiellas and 19(15.1%) strains of Escherichia coli. Verdigris Pseudomonas ranked first in isolating rate among prevalent gramnegative bacilli strains from 2006 to 2008, but it was replaced by cinetobacters (9 strains, 40.9%) in 2009. The most prevalent strains of grampositive cocci were staphylococcus aureus (35 strains, 53%) from 2006 to 2009. Gramnegative bacilli were most sensitive to imipenem and no grampositive cocci were resistant to vancomycin. Conclusion Gramnegative bacilli are the most common pathogens in lower respiratory infections after thoracotomy and show extremely high drugresistance rate. Drugresistance monitoring of pathogens should be promoted. It may contribute to rational antimicrobial therapy and effective control of infections.
Objective To study the catheter-related infection (CRI) in cancer patients treated with central venous catheterization. Methods A prospective study with 196 cancer patients was conducted to analyze the types of catheter-related infection and pathogen, as well as the relationship between CRI and the following factors: insert location, gender, age, remained time, or bone marrow suppression. Results Of the total 196 cases, 16 cases were diagnosed as CRI and the CRI rate was 8.2%. The types of CRI were five cases of pathogen colonization, four cases of insert location infection and seven cases of catheter-related bloodstream infection. Of the total 244 specimens, 20 were positive including 7 pathogenic bacteria in either Gram positive or Gram negative types, the dominating pathogens were staphylococcus aureus, staphylococcus epidermidis, acinetobacter baumannii and klebsiella pneumoniae. CRI was related to both insert location and age which were both the independent risk factors. Conclusion The concept of prevention should be set up, and the comprehensive measures should be taken to reduce CRI, such as choosing an appropriate insert location and complying with a strict catheter insert standard.
目的 对546株常见病原菌进行耐药分析，为感染性疾病的临床治疗提供依据。 方法 对2012年4月－9月从临床标本中分离的546株常见病原菌进行耐药分析，菌种鉴定及药物敏感试验结果由法国生物梅里埃公司VITEK 2 COMPACT系统完成。 结果 在546株病原菌中，G−杆菌占82.8%，其前3位分别为大肠埃希菌（占22.2%），鲍曼/溶血不动杆菌（占16.5%），肺炎克雷伯菌（占15.4%）。在G−杆菌中，除嗜麦芽窄食单孢菌外，亚胺培南、厄它培南的耐药率最低，其次为丁胺卡那霉素和哌拉西林/他唑巴坦。鲍曼/溶血不动杆菌、肺炎克雷伯菌、铜绿假单孢对氨苄青霉素的耐药率均超过95%。金黄色葡萄球菌的耐药率较凝固酶阴性葡萄球菌低，耐甲氧西林金黄色葡萄球菌占22.00%；而耐甲氧西林凝固酶阴性葡萄球菌占94.44%。此外，金黄色葡萄球菌和凝固酶阴性葡萄球菌对万古霉素、利奈唑胺、替加环素、奎奴普丁/达福普丁、呋喃妥因的耐药率为0.00%。 结论 在该院新院区临床标本分离的常见病原菌中，仍以G−杆菌占优势。在G−杆菌中，除嗜麦芽窄食单孢菌外，亚胺培南、厄它培南的耐药率最低。金黄色葡萄球菌的耐药率较凝固酶阴性葡萄球菌低，且尚未发现对万古霉素耐药的葡萄球菌。
目的 了解本院病原菌分布及其耐药性趋势，为临床合理使用抗菌药物提供依据。 方法 对2011年1月－2012年1月门诊和住院患者送检的临床标本1 643份进行细菌培养及药物敏感性检测，并对其细菌耐药性进行分析。 结果 1 643份细菌培养标本中共检出致病菌750株，检出阳性率为45.6%；病原菌中，G+球菌242株，占32.3%，以金黄色葡萄球菌、凝固酶阴性葡萄球菌、肠球菌属为主。G−杆菌382株，占50.9%，以大肠埃希菌、铜绿假单胞菌、克雷伯菌属、肠杆菌属、鲍曼不动杆菌为主。耐甲氧西林金黄色葡萄球菌占金黄色葡萄球菌的59.0%。金黄色葡萄球菌对青霉素、头孢唑啉耐药率均为100.0%。肠球菌属中分离率最高的为粪肠球菌和屎肠球菌，粪肠球菌对青霉素的耐药率为35.3%。大肠埃希菌和肺炎克雷伯菌产超广谱β-内酰胺酶检出率分别为77.6%和56.7%；非发酵菌以铜绿假单胞菌和鲍曼不动杆菌为主，耐碳青酶烯类鲍曼不动杆菌分离率占鲍曼不动杆菌37%。鲍曼不动杆菌、铜绿假单胞菌对亚胺培南的耐药率分别为46.3%、28.3%。 结论 本院细菌耐药性较高，应加强抗菌药物的合理应用，应谨慎使用第三代头孢菌素等β-内酰胺类抗菌药物，以减轻抗生素的选择性压力、防止耐药菌株在医院内播散。
目的 了解2011年1月－2012年12月临床分离病原菌的分布和耐药情况，为指导临床合理用药和医院感染的控制提供依据。 方法 采用法国梅里埃API半自动微生物鉴定分析系统进行细菌鉴定和药物敏感试验，对所得数据用WHONET 5.4软件完成统计分析。 结果 送检的3 073份临床标本中共分离出病原菌696株，阳性率22.1%。其中，G+菌占31.3%，G?菌占64.1%，主要为金黄色葡萄球菌（25.6%）、大肠埃希菌（17.8%）、肺炎克雷伯菌（16.4%）、铜绿假单胞菌（11.5%）。在葡萄球菌中，青霉素、红霉素的耐药率最高，分别是95.6%、78.5%；尚无耐万古霉素菌株。肠道杆菌中，阿莫西林的耐药率最高，为95.0%；替卡西林的耐药率为91.0%；头孢噻吩的耐药率为72.0%；尚无耐亚胺培南菌株。多重耐药的大肠埃希菌、肺炎克雷伯菌对亚胺培南具有良好的敏感性。 结论 该院临床分离的致病菌耐药情况不严重，对病原菌的分布和耐药情况的研究较好地指导了临床合理用药和控制了医院感染。