During the catastrophe of Wenchuan Earthquake on May 12,2008 in Sichuan province and the post-earthquake rescue,shining spirit of Bethune recurred among medical staffs.Based on the real scenes in Huaxi Hospital of Sichuan University,this paper clarifies a new definition of Bethune's spirit which combines the spirit of times,spirit of post-earthquake rescuing,and Bethune's spirit.

Objective To investigate antibiotic resistance and staphylococcal cassette chromosome mec(SCCmec)genotype of Staphylococcus aureus isolated from patients with nosocomial infections.Methods Antibiotic susceptibility pattern anti the gene mecA were examined in 89 Staphylococcus aureus isolates from patients with nosocomial infection in Tianjin Medical University Cancer Institute and Hospital.The SCCmec genotype in the mecA-positive strains were fuaher investigated with multiplex PCR.Results In 89 Staphylococcus aureus strains,21(23.6%)were phenotypic methicillin-resistant Staphylococcus aureus (MRSA)and 39(43.8%)were rnecA positive,the difierence was of statistical significance(χ2=8.146,P=0.004).MRSA strains showed multiple-antibiotic resistance but sensitive to vancomycin.Tvpe Ⅲ SCCmec carriers were the major epidemiological strains(26/39,66.7%).ConclusionMRSA strains isolated from Tianjin Medieal University Cancer Institute and Hospital are characterized by multi-drug resistance,and type Ⅲ is the dominant SCCmec earried by the MRSA strains.

Objective To compare several methods for the rapid detection of methicillin resistant StaphylOCOCCUS aureus(MRSA).Methods Forty-four Staphylococcus aureus isolates from Tianjin Medical University Cancer Institute and Hospital(TMUCIH)were detected by Oxacillin Kirby-Bauer disk diffusion method,Cefoxitin Kirby-Bauer disk diffusion method,Oxacillin micro-broth dilution method,E tests and PBP2a Latex agglutinaltion assay.These above results were compared with PCR analysis.Results PCR analysis showed that 36 MRSA strains containing mecA was identified.Thirty-two MRSA strains were detected by Oxacillin Kirby-Bauer disk diffusion method,Cefoxitin Kirby-Bauer disk diffusion method and Oxacillin micro-broth dilution method.Compared with PCR analysis,the sensitivity and specificity is 88.9%and 100%respectively.Thirty-three MRSA strains were identified by E test,with the sensitivity of 88.9%and specificity of 87.5%.Twenty-nine MRSA strains were identified by PBP2a latex agglutination assay with the sensitivity of 80.5%and specificity of 100%.Conclusions The turnaround time of PBP2a Latex agglutination assay could be reduced 24 h compared with other methods for detection of MRSA.This rapid,convenient and specific method could be applied in clinical laboratories for MRSA detection.

Objective To evaluate the collateral circulation after canine acute coronary artery occlusion with contrast real-time three-dimensional echocardiography (RT-3DE). Methods Left anterior descending coronary artery was ligated in 12 healthy mongrel dogs. All dogs underwent myocardial contrast echocardiography (MCE) before ligation, immediately after ligation, at 30 min and 180 min after ligation respectively, and myocardial mass with collateral supply was calculated. Results Different degrees of collateral circulation were established in all dogs after left anterior descending coronary artery ligation. At 30 min after ligation, the myocardial mass with collateral supply was (9.65±2.90) g, while at 180 min after ligation were (12.58±3.98) g (P<0.01). Conclusion The coronary collateral circulation can be observed clearly and myocardial mass with collateral supply can be quantified accurately with contrast RT-3DE.