Bacteria Flora in Nosocomial Infection over the Past Five Years:Analysis on Distribution Tendency and Drug Resistance / 中华医院感染学杂志

ABSTRACT

OBJECTIVE To understand the distribution or change and drug resistance of the bacteria flora in nosocomial infection,in order to provide laboratory evidence for controlling nosocomial infection and to indicate clinical antimicrobial agents usage.METHODS All isolates were identified by routine procedure and VITEK microbe automatic system and API identified system.Drug susceptibility test was used K-B paper disk diffusion method in accordance with the CLSI/NCCLS standards.RESULTS There were 11 464 strains of bacteria which were obtained from 2002 to 2006.Sputum,secretion and middle urine were the major specimens.The major bacteria floras were Pseudomonas aeruginosa,Escherichia coli,Acinetobacter,Enterococcus,Staphylococcus and Candida albicans,whose isolating rates were 57.02% in 2002,64.46% in 2003,57.83% in 2004,57.49% in 2005,and 60.73% in 2006.E.coli and Klebsiella pneumoniae produced ESBLs rates were from 39.87% to 61.98% that drug resistance rates to cefoperazone/sulbactam and imipenem were 14.06% and 0.64%.The drug resistance rates of nonferment Gram-negtive bacteria to cefoperazone/sulbactam were below 33.22%,Gram-positive cocci to vancomycin was below 0.34%.CONCLUSIONS Now,the important bacteria flora is nonferment Gram-negative bacteria in nosocomial infection.The P.aeruginosa,E.coli,Acinetobacter baumannii,Enterococcus faecalis,C.albicans,and meticillin-resistant staphylococcus(MRS) were prevalent important bacteria in nosocomial infection.The situation of producing ESBLs in Enterobacteriaceae is very severe.Glycopeptides are the best choice to MRS.To zymogenic bacteria and the nonferment Gram-negtive bacteria that cause severe infection,combining-drug treatment can be chosen according to drug susceptibility test results.