耐甲氧西林金黄色葡萄球菌的目标性监控与分析

目的 了解临床耐甲氧西林金黄色葡萄球菌的分离及耐药性,探索耐甲氧西林金黄色葡萄球菌感染病例的监控措施.方法 对2010年医院临床分离的病原菌进行目标性监测,统计出耐甲氧西林金黄色葡萄球菌的株数以及耐药性,并对临床耐甲氧西林金黄色葡萄球菌感染病例实施监控.结果 全年检测结果发现,共分离出金黄色葡萄球菌334株,耐甲氧西林金黄色葡萄球菌50株,检出率为14.97％;对抗菌药物耐药率较高;全院未发生耐甲氧西林金黄色葡萄球菌的暴发和流行.结论 耐甲氧西林金黄色葡萄球菌分离株数较多,耐药率较高,应该加强临床合理使用抗菌药物的管理,并对耐甲氧西林金黄色葡萄球菌感染病例实施监控,预防和减少多药耐药菌的产生,控制医院感染.     

Methicillin resistant Staphylococcus aureus strains in the greater Düsseldorf area

Over a period of three years the incidence of methicillin resistant Staphylococcus aureus (MRSA) isolates in 11 hospitals in the greater Düsseldorf area was observed. From a total of 7,814 S. aureus isolates, 489 (6.3%) were methicillin resistant. From 198 different patients, MRSA first isolates and 291 second isolates could be cultured. Methicillin resistance among all S. aureus isolates from 11 hospitals in the greater Düsseldorf area, ranged from 0.5 to 7.8% dependant on the size of the hospital. The highest incidence (7.8%) was found in a 1,500 bed hospital and the lowest incidence in a smaller 200 bed hospital (0.5%). With respect to the distribution among clinical departments the highest incidence of MRSA isolates was found on intensive care units and surgical wards, 25.5% and 13.0% respectively. The commonest specimen from which the MRSA isolates were cultured were respiratory secretions (17.6%) followed by central venous catheter tips (12.8%). In terms of the drug resistance pattern: all isolates were resistant to the amino- glycosides and gyrase inhibitors, whereas between 80% and 90% were sensitive to fusidic acid, chloramphenicol and pyrimethamine-sulfamethoxazole. All the strains were sensitive to the glycopeptide antibiotics, vancomycin and teicoplanin. Strain typing of 181 available first isolates (from a total of 198 first isolates) by PFGE and phage lysotyping produced identical results in more than 90% of all cases. Twenty-eight different MRSA strain types were identified by PFGE and in total 23 lysotypes could be determined. During the period of investigation an increased incidence of MRSA on an intensive care unit was observed, in which a total of 204 MRSA (42% of the total number) were isolated. The strain typing using both methods showed that on that ICU eight different MRSA types were involved in this outbreak. A hygiene plan was implemented on the unit with considerable success in reducing the incidence and spread of MRSA.     

Nasal carriage and antibiotic resistance of Staphylococcus aureus isolates from hospital and non-hospital personnel in Abha, Saudi Arabia

The prevalence of nasal carriage of Staphylococcus aureus, antibiograms and prevalence of methicillin-resistant S. aureus (MRSA) were studied in 1999 among healthy hospital and non-hospital personnel in Abha, Saudi Arabia. S. aureus was isolated from 26.1% of 299 adults in the community and 25.4% of 279 hospital personnel. No isolate was resistant to vancomycin. Antibiotic resistance rates, for all other antibiotics tested except cephalothin, were significantly higher for strains from hospital personnel (P values < 0.001-0.04) compared to non-hospital adults. The antibiograms were also compared with those of 140 clinical isolates. The rates of resistance of the inpatient strains to all the antibiotics tested were significantly higher than those of hospital nasal carrier strains (P < 0.001-0.05). MRSA was isolated, respectively, from 5.1% and 18.3% of non-hospital and hospital carriers; MRSA carriage rates were 1.3% and 4.7%, respectively, for non-hospital and hospital carriers, and 61% of S. aureus isolates from infected patients were MRSA. Only 8% of non-hospital but 44% of hospital carrier strains were multiply resistant (P < 0.001). Multiple resistance among inpatient strains (89%) was significantly higher than that among hospital nasal strains (44%) (P < 0.001). Such rates of multiple resistance and endemic MRSA prevalence among healthy carriers (11%) at a much higher rate than those reported in the literature should raise concern in a region with unrestricted availability of antibiotics.     

Three-year survey of community-acquired methicillin-resistant Staphylococcus aureus producing Panton-Valentine leukocidin in a French university hospital

A retrospective survey was conducted at Bicêtre Hospital, France from January 2001 to September 2003 to screen for S. aureus isolates with a typical phenotype previously involved in necrotizing pneumonia in France. They were resistant to oxacillin and kanamycin, of intermediate susceptibility to fusidic acid, and susceptible to tobramycin and fluoroquinolones. Seventeen isolates were found and 16 were viable. The Panton-Valentine leukocidin (PVL) genes, various toxin genes and SCCmec IV and agr3 alleles were detected in all isolates. The clonal origin of these isolates was demonstrated by pulsed-field gel electrophoresis. Fourteen isolates were community-acquired methicillin-resistant Staphylococcus (CA-MRSA) isolated from previously healthy patients with skin or soft tissue infections. Three infections were of nosocomial origin, underlining that these PVL-producing CA-MRSA strains may also be hospital acquired. Five CA-MRSA isolates with an identical resistance phenotype collected in a neighbouring teaching hospital (H?pital Pitié-Salpétrière, Paris, France) were also PVL positive. Three isolates were clonally related to those of the Bicêtre Hospital whereas two were not. This retrospective study identified PVL-producing CA-MRSA in two Parisian hospitals. The incidence at Bicêtre Hospital was 0.8% of all S. aureus and 2% of all MRSA isolated. Our data indicate that these MRSA isolates might become hospital acquired.     

Inducibility and potential role of MecA-gene-positive oxacillin-susceptible Staphylococcus aureus from colonized healthcare workers as a source for nosocomial infections

To determine the carrier rate of methicillin-susceptible mecA-positive Staphylococcus aureus (dormant MRSA) among healthcare workers (HCWs), 447 nurses and physicians from 13 general wards and intensive care units were investigated for nasal or oropharyngeal S. aureus carriage during one year whenever an MRSA patient was treated. Induction of phenotypic resistance in all mecA-positive oxacillin-susceptible aureus was attempted by 24 h exposure to oxacillin and cefotaxime. Organisms from the broth tube with the highest antibiotic concentration and visible growth after incubation were re-exposed for a total of seven repetitive exposures. Two mecA-negative oxacillin-susceptible S. aureus served as negative control. A population analysis before and after antibiotic exposure was performed. A third of the HCWs were found to be S. aureus carriers. Only three nurses were MRSA positive (0.7%). Seven isolates of dormant MRSA were isolated in six nurses and one doctor (1.6%). After four days of repetitive antibiotic exposure six of seven dormant MRSA were highly resistant to oxacillin. Resistance of the two control S. aureus without the mecA gene was not changed by repetitive antibiotic exposure. Two of the seven dormant MRSA were clonally related as shown by pulsed-field gel electrophoresis (PFGE). The PFGE pattern of one dormant MRSA (HCW) was identical to an MRSA (HCW). The pattern of another dormant MRSA was indistinguishable from an MRSA isolated from a patient who was treated at the same time on the same ward suggesting transmission from the HCW to the patient. Dormant MRSA may be isolated twice as often as MRSA from HCWs. Transmission to patients is possible, which may lead to clinical infections. It might be useful to screen methicillin-susceptible S. aureus isolates from HCWs for the mecA gene when recurrent infections with MRSA occur on a ward and a source cannot be found.     

临床不同标本分离金黄色葡萄球菌的药物敏感性

目的了解某院金黄色葡萄球菌感染分布及药物敏感性。方法对2011年1月-2012年8月该院分离的520株金黄色葡萄球菌标本来源和药敏结果进行分析。结果520株金黄色葡萄球菌中,耐甲氧西林金黄色葡萄球菌（MRSA）总检出率为23.27%(121/520),其中痰标本MRSA检出率最高,达80.82%,其次是尿液（33.33%）、血液（25.00%）、引流物标本（18.31%）,皮肤组织检出率最低,仅11.38%。未发现对万古霉素和利奈唑胺耐药的金黄色葡萄球菌;金黄色葡萄球菌对万古霉素、利奈唑胺、复方磺胺甲口恶唑、呋喃妥因均较敏感。皮肤组织来源的MRSA对庆大霉素、左氧氟沙星、环丙沙星、莫西沙星、利福平、四环素的敏感率高于其他标本来源的MRSA（P＜0.05）;对红霉素、克林霉素敏感率低于其他标本来源MRSA（P＜0.05）。MRSA对青霉素完全耐药,其中社区感染MRSA对庆大霉素、左氧氟沙星、环丙沙星、莫西沙星、利福平、四环素的敏感率高于医院感染MRSA（P＜0.05）;对红霉素、克林霉素、复方磺胺甲口恶唑的敏感率低于医院感染MRSA（P＜0.05）。结论金黄色葡萄球菌是该院分离的重要病原菌,耐药性强,临床应根据药敏试验结果合理使用抗菌药物。     

金黄色葡萄球菌临床分离株耐药谱分析

目的调查2005年1~8月分离自江西宜春金黄色葡萄球菌的耐药情况。方法采用常规方法分离金黄色葡萄球菌,用全自动微生物分析仪进行菌种鉴定和药敏试验,采用苯唑西林纸片扩散法检测耐甲氧西林金黄色葡萄球菌(MRSA)。结果金黄色葡萄球菌主要分离自痰液和尿液,MRSA的分离率为62.1%;MRSA对氨苄西林/舒巴坦、青霉素和头孢唑林的耐药率均为100%,而MSSA均为0;所有的分离株对呋喃妥因和万古霉素都敏感;MRSA对克林霉素、红霉素、庆大霉素、四环素、利福平、复方新诺明和左氧氟沙星的耐药率分别为70.7%、86.6%、87.8%、82.9%、42.7%、30.5%和91.5%,而MSSA分别为32.0%、42.0%、20.0%、20.0%、10.0%、30.0%和6.0%。结论MRSA的耐药性较为严重,而MSSA除青霉素外耐药率较低,万古霉素对MRSA的体外抗菌活性非常强。     

Characterization of methicillin-resistant Staphylococcus aureus associated with nosocomial infections in the University Hospital, Kuala Lumpur.

Methicillin-resistant Staphylococcus aureus (MRSA) as a hospital pathogen has presented many clinical problems in the University Hospital, Kuala Lumpur, Malaysia since 1978. The need for control of spread of these organisms became evident by 1985 when it was noted that the incidence of MRSA among S. aureus isolated from hospital inpatients had increased from 11.5% in 1979 to 18.8% in 1985. The characteristics of 50 MRSA isolates associated with nosocomial infections in the hospital are described here. The predominant strains produced Type IV coagulase and 84% of isolates studied showed moderate to high resistance to methicillin with MIC values of 25 mg l-1 or higher. All the MRSA isolates that could be phagetyped were susceptible to Group III phages, with 76.6% of the isolates being susceptible to phage 85. At least 10 different patterns were distinguishable by plasmid typing, the majority of isolates harbouring up to four small plasmids.     

广东省人群多重耐药金葡菌的携带及耐药性分析

目的 调查广东省部分人群(动物从业人员和一般人群)的多重耐药金葡菌(multidrug-resistant S.aureus,MDRSA)携带情况,并分析菌株的耐药性.方法 对研究对象进行问卷调查和鼻拭子采样,对金葡菌进行药敏试验,分析方法采用x2检验.结果 动物从业人员中金葡菌、MDRSA、甲氧西林耐药金葡菌(methicillin-resistantS.aureus,MRSA)的携带率均高于对照人群(分别为13.3％ vs9.3％;9.5％ vs 3.4％;7.0％ vs 1.4％;均有P＜0.01).金葡菌对青霉素、克林霉素、四环素和红霉素的耐药率较高,MDRSA主要耐药模式是同时对克林霉素、红霉素、四环素耐药.除了青霉素外,动物从业人员金葡菌对各类抗生素的耐药率均高于对照人群;MRSA菌株对各类抗生素的耐药率均高于甲氧西林敏感金葡菌.结论 本研究提示职业性动物接触可能导致从业人员感染耐药细菌.     

Antimicrobial use and methicillin-resistant Staphylococcus aureus in a large nursing home

INTRODUCTION: In 1997, 18% of Staphylococcus aureus clinical isolates at the Wisconsin Veterans Home were resistant to methicillin. By 2002, 51% were resistant. METHODS: We determined the antibiotic sensitivity pattern of our methicillin-resistant S. aureus (MRSA) isolates as well as changes in utilization of specific antibiotics between two time periods. We reasoned that antibiotics with activity against methicillin-sensitive S. aureus (MSSA), but not MRSA, might be driving the overgrowth of MRSA. RESULTS: In our facility, MRSA is usually resistant to quinolones; MSSA is usually sensitive. Both MSSA and MRSA are usually sensitive to TMP-sulfa. An increased percentage of S. aureus resistant to methicillin (18%) was associated with a 42% increase in quinolone use and a 37% decrease in TMP-sulfa use. CONCLUSION: Our analysis and previous reports suggest that replacement of TMP-sulfa by quinolones could be selecting MRSA in our facility. This conclusion, however, is speculative, based on association, and requires confirmation.     

Methicillin resistant Staphylococcus aureus infections-implications in hospital infection control

BACKGROUND: A significant part of nosocomial infections are caused by methicillin resistant Staphylococcus aureus (MRSA). Nosocomial MRSA are known to be multidrug resistant and thus difficult to treat. METHODS: A 2 year study was conducted between January 2001 and December 2002 at Karnataka Institute of Medical Sciences Hospital, Hubli to assess the prevalence of MRSA and its antibiotic susceptibility pattern in various wards. RESULTS: S. aureus was isolated from 714 patients, 283 (37.53%) of which exhibited methicillin resistance. Although these MRSA were multidrug resistant in all the wards, the problem was more severe in NICU and orthopedic wards. CONCLUSION: The results highlight the need for effective implementation of infection control measures in the hospital. There is a need for the judicious use of antimicrobial agents in the hospital and outside as their indiscriminate use can exert pressure in selecting out MRSA and other multidrug resistant organisms.     

A study of 245 infected surgical wounds in Singapore.

The aims of the study were to correlate the laboratory detection rate of wound infections with the actual wound infection rate, and to analyse the bacteriology of these wounds to provide a rationale for antibiotic usage in prophylaxis and treatment of surgical wound infections. The wound infection rate in a general surgical unit was determined using the most comprehensive surveillance available to us and was correlated with the laboratory detection rate. A correlation coefficient of 0.8 was obtained, allowing a reasonable estimation of the actual wound infection rate from laboratory data. Review of the bacteriology of consecutive infected surgical wounds over a 4 year period in a university hospital, revealed that the commonest organisms cultured were Staphylococcus aureus, Escherichia coli, Klebsiella spp., Pseudomonas aeruginosa, enterococci and beta-haemolytic streptococci. Methicillin-resistant S. aureus (MRSA) caused 50% of all staphylococcal wound infections. All MRSA isolates were sensitive to fusidic acid and vancomycin. All the non-MRSA isolates of S. aureus were sensitive to cephalexin. Some 89% of E. coli were sensitive to gentamicin, with 93% and 100% sensitive to cefuroxime and ceftriaxone respectively. Klebsiella isolates have shown an increased resistance to aminoglycosides, with a new strain from one patient, isolated in 1990, resistant to penicillins, aminoglycosides and third generation cephalosporins. Pseudomonas spp., enterococci and beta-haemolytic streptococci did not show a change in resistance patterns over the same time period.     

Community-acquired methicillin-resistant Staphylococcus aureus in Central Australia

To date, there has been scant information about the burden of methicillin-resistant Staphylococcus aureus infections in Central Australia. Our aims were to determine the proportion of Staphylococcus aureus infections due to methicillin-resistant strains in Central Australia, to characterise resistance to non-beta lactam antibiotics and to correlate findings with available demographic information. We retrospectively reviewed S. aureus isolates identified by the Microbiology Laboratory of the Pathology Department, Alice Springs Hospital between September 2005 and February 2006. Multi-resistance was defined as resistance to three or more non-beta lactam antibiotics. We identified the recovery site and extended antibiotic resistance profile of each isolate. Demographic data included place of residence, discharge diagnosis and ethnicity. There were 524 S. aureus isolates: 417 (79.6%) methicillin-sensitive S. aureus, 104 (19.7%) non-multi-resistant MRSA (nmrMRSA) and 3 (0.7%) multi-resistant MRSA (mrMRSA). MRSA accounted for 7/22 (32%) invasive infections and 91/474 (19.2%) cases of staphylococcal skin infections. Aboriginal people comprised 89 per cent (93/104) of patients with nmrMRSA; 57 per cent lived in remote communities, 21 per cent in suburban Alice Springs, and 18 per cent in Alice Springs Town Camps. Six per cent (6/104) of nmrMRSA were hospital-acquired. Of the nmrMRSA isolates, 57 per cent (59/104) were resistant to erythromycin and 7 per cent (7/104) to fusidic acid. All MRSA isolates were susceptible to co-trimoxazole. In conclusion, Central Australia has high rates of community-acquired nmrMRSA and low rates of multi-resistant MRSA. Erythromycin resistance in S. aureus is also common. These findings should prompt the review of antimicrobial prescribing guidelines for the region, especially for treatment of skin and soft tissue infections.     

耐甲氧西林金黄色葡萄球菌感染在临床干预后耐药性变化的研究

目的探讨医院对耐甲氧西林金黄色葡萄球菌(MRSA)感染在临床干预后耐药性的变化。方法采用回顾性调查分析方法,研究医院住院患者2009、2010年MRSA感染在临床干预后的耐药性变化。结果在住院患者中2009年40 846份标本中检出265株金黄色葡萄球菌,其中MRSA 229株,检出率占86.4%;2010年35 045份标本中检出239株金黄色葡萄球菌,其中MRSA 182株,检出率占76.2%,2010年比2009年MRSA的检出率下降了10.2%。结论住院患者MRSA感染经临床干预后,可以降低MRSA的感染率;证明了针对MRSA感染的干预措施是有效的。     

Antimicrobial resistance in Staphylococcus aureus at the University of Chicago Hospitals: a 15-year longitudinal assessment in a large university-based hospital.

OBJECTIVES: To describe a longitudinal profile of resistance to beta-lactam antimicrobials among isolates of Staphylococcus aureus at a large university teaching hospital and to evaluate the impact of the methicillin resistance phenotype on resistance trends for non-beta-lactam antimicrobials. DESIGN: Retrospective evaluation of antimicrobial susceptibility data for all 17,287 S. aureus isolates obtained from January 1986 through December 2000. SETTING: The University of Chicago Hospitals, a family of tertiary-care, university-affiliated hospitals in Chicago, Illinois, consisting of 547 adult and pediatric beds. RESULTS: The annual rate of resistance to methicillin increased from 13% in 1986 to 28% in 2000 (P < .001) and has not plateaued. For each non-beta-lactam antimicrobial tested, the annual rates of resistance were far higher among methicillin-resistant S. aureus (MRSA) isolates than among methicillin-susceptible S. aureus (MSSA) isolates. The annual rates of resistance to the macrolide, lincosamide, and streptogramin (MLS) antimicrobials erythromycin and clindamycin increased among MSSA isolates (P < .01), but remained lower than 20%. Resistance to the MLS antimicrobials was higher among MRSA isolates (higher than 60%), but the annual rate decreased significantly during the study (P < .01). CONCLUSION: The prevalence of methicillin resistance among S. aureus isolates has continued to increase; resistance to non-beta-lactam antimicrobials is far more common among MRSA isolates. Recent decreases in the proportion of MRSA isolates resistant to non-beta-lactam antimicrobials suggest important changes in the epidemiology of this pathogen.     

耐甲氧西林金黄色葡萄球菌的变迁与耐药性分析

目的 探讨耐甲氧西林金黄色葡萄球菌(MRSA)的流行分布和多药耐药趋势,防止MRSA的上升,采取有效的医院管理措施.方法 对2003～2008年医院住院患者部分门诊患者各类标本分离到的金黄色葡萄球菌作药敏试验和甲氧西林耐药性测定.结果 6年中MRSA分离率分别为56.8%、79.6%、52.9%、17.8%、20.2%、12.9%,对大部分临床常用抗菌药物耐药率随MRSA的变化而变化,利福平耐药率较低,未发现耐万古霉素金黄色葡萄球菌.结论 医院MRSA分离率2003～2005年与高发地区相近,2006～2008年明显下降.     

516株金黄色葡萄球菌对9种抗生素的耐药性分析

目的了解金黄色葡萄球菌对9种常见抗生素的耐药性,为临床治疗提供依据. 方法按NCCLS纸片扩散方法,测定并判读金黄色葡萄球菌对抗生素的耐药性,并以NCCLS纸片法测定MRSA耐药表型. 结果 516株金黄色葡萄球菌对青霉素的耐药率均约90%,除对万古霉素和复方新诺明外,2004年该菌对监测的9种抗生素的7种药物的耐药率＞57.8%,MRSA菌为64.4%,目前我院未检测到对万古霉素耐药的金黄色葡萄球菌;516株金黄色葡萄球菌MRSA的平均检出率为44.8%;MSSA对青霉素的耐药率高达86.6%,对红霉素耐药率为55.1%,对克林霉素、四环素和复方新诺明的耐药率约20%～30%;MRSA除复方新诺明和万古霉素外,对其他各类药物耐药性明显升高,对环丙沙星耐药增高最明显(77.5%). 结论金黄色葡萄球菌感染发生率及耐药性快速增长, MRSA对各类抗生素多重耐药.     

儿科院内临床常见细菌耐药性监测

目的调查儿科临床常见致病菌的耐药性现状。方法药物敏感性试验采用Kirby-Bauer纸片扩散法(苛养菌用浓度梯度法),耐药性数据分析采用WHONET5软件。结果2002年1月~2003年12月共收集儿科医院患者首次分离2 303株,其中革兰阳性菌占29.7%,革兰阴性菌占70.3%;耐甲氧西林金黄色葡萄球菌(MRSA)和耐甲氧西林凝固酶阴性葡萄球菌(MRCNS),分别占金黄色葡萄球菌和凝固酶阴性葡萄球菌的9.7%与67.6%,无万古霉素耐药株;肠球菌耐万古霉素株4.1%;11.9%的肺炎链球菌对青霉素耐药;肠杆菌科细菌对亚胺培南的耐药率最低;产超广谱β-内酰胺酶(ESBLs)的大肠埃希菌和肺炎克雷伯菌株的检出率分别为49.7%和63.1%。结论细菌耐药性仍是目前临床上的严重问题,应重视开展儿科抗感染治疗中耐药性监测工作,同时合理使用抗菌药物以降低耐药性和采取有效措施控制其传播也是非常重要的。     

333株金黄色葡萄球菌引起的临床感染类型及耐药性分析

摘要:目的　了解金黄色葡萄球菌的感染现况及耐药性,为临床治疗金黄色葡萄球菌引起的感染提供依据。方法　对某院2011年1月-2014年10月临床送检的标本（痰标本除外）中分离出的金黄色葡萄球菌进行药敏实验及分析研究。结果　共检出金黄色葡萄球菌333株,主要来源于局部脓肿和引流液,占63.35％。耐甲氧西林金黄色葡萄球菌（MRSA）检出97株,占29.13%。金黄色葡萄球菌对万古霉素、利奈唑胺和替考拉宁的敏感率均为100%,对青霉素和红霉素的耐药性大于75%。结论　金黄色葡萄球菌感染多导致局部化脓性炎症,耐甲氧西林金黄色葡萄球菌（MRSA）的耐药率明显高于甲氧西林敏感的金黄色葡萄球菌（MSSA）,临床应根据分离株耐药特点选用不同的治疗方案,以确保用药合理、安全、有效。     

临床分离金黄色葡萄球菌的耐药特点和MRSA分子分型

目的研究耐甲氧西林金黄色葡萄球菌(MRSA)的耐药性及其基因分型。方法收集某院2014年1月—2015年11月检出的非重复金黄色葡萄球菌967株,检测其药敏结果及mecA抗性基因、杀白细胞素(PVL)基因;MRSA菌株经多重PCR进行葡萄球菌盒式染色体mec(SCCmec)分型、多位点序列分型(MLST)、金黄色葡萄球菌蛋白A基因(spa)分型、金黄色葡萄球菌附属因子调节子(agr)分型。结果 967株金黄色葡萄球菌共检出210株MRSA,MRSA检出率为21.72%;痰标本MRSA检出率高于皮肤软组织标本(68.09%vs 11.83%,P0.05);金黄色葡萄球菌中未发现对万古霉素和利奈唑胺耐药菌株,MRSA对庆大霉素、四环素、红霉素、克林霉素、左氧氟沙星、环丙沙星、莫西沙星、呋喃妥因、利福平的敏感率均低于MSSA,差异均有统计学意义(均P0.05);MRSA对复方磺胺甲口恶唑的敏感率高于MSSA,差异有统计学意义(P0.05)。皮肤软组织分离的MRSA对庆大霉素、左氧氟沙星、环丙沙星、莫西沙星、利福平的敏感率为86.90%~95.24%,而痰分离的MRSA仅为1.56%~15.63%。967株金黄色葡萄球菌检测出210株携带mecA基因,10株携带PVL基因,210株MRSA中有8株未分型,占3.81%。MLST主要以ST239(177株)为主;SCCmec分型主要以Ⅲ型(177株)为主;spa分型主要以t 030(177株)为主;agr分型主要以Ⅰ型(196株)为主。结论该院MRSA菌株主要流行克隆ST239-MRSA-SCCmecⅢ-t030,耐药形势严峻,应加强医院内耐药菌株的监测。