Bacterial composition and resistance of wound infections / 中华普通外科杂志

ABSTRACT

Objective To determine the bacterial composition and resistance of wound infections in China. Methods Disc diffusion test,MIC test and E-test were used to detect the antimicrohial resistance of bacterial isolates from wound secretions.WHONET 5.4 was applied for analysis of the bacterial sensitive data from 86 domestic tertiary hospitals from June 1,2006 to May 31,2007. Results (1)2125 bacterial strains were coileeted in the survey period,which included 994 strains (46.8%) of Gram positive and 1131 strains (53.2%) of Gram negative bacteria,Staphylococcus(780 strains,36.7%),E.coli(338 strains,15.9%) and Pseudomonas aeruginosa (231 strains,10.9%)were the most common isolates.(2)38.2% and 84.1% of Staphylococcus aureus and Staphylococcus epidermidis were methicillin-resistant.respectively.No Staphylococcus strain was resistant to vancomycin or teicoplanin.(3)ESBLs positive rate of E.coli was about 60%,while the resistant rate to quinolones Was about 70%.(4)The resistant rates of Staphylococci and E.coli isolated from adults to aminoglyeoside and quinolones were higher than those from children.(5)The resistant rates of Staphylococei to cephalosporin,aminoglyeoside and quinolones from inpatients were higher than those from out-patients. Conclusion Staphylococci,E.coli and Pseudomonas aeriginoso were among the most common organisms isolated from wound infections.The ESBLs positive rate of E.coli from wound infections was higher than that from all specimen bacteria found in other surveys performed during the same period and the methicillin resistant Staphylococci were less than that.