Analysis of Drug-Resistance of Acinetobacter Baumannii Producing AmpC Enzyme

Objective To investigate the drug-resistance and distribution of 142 strains acinetobacter baumannii.Methods Drug-resistance test of acinetobacter baumannii strains was observed in 13 kinds of antibiotics.The drug sensitivity tests was performed by the method of Kirby-Bauer paper-diffusion with the standard of NCCLS.AmpC enzyme was examined by cefoxitin three dimension test and PCR amplification of ampC structure gene were studied.Results The main sources of specimen were sputum,wound secretion,urine and blood.The respiratory tract was a major site to the development of acinetobacter baumannii.Acinetobacter baumannii strain emerged mostly in the intensive care unites.The drug resistance to cefotaxime,ceftriaxome and aztreonam were high.PCR amplification showed that of 142 acinetobacter baumannii strains,23 strains had ampC structure gene which accounted for 16 2% total strains.The drug resistance of acinetobacter baumannii producing AmpC enzyme were significantly higher than those of non-producing AmpC.The best choice of treatment was imipenem.Conclusions Acinetobacter baumannii have higher multiple-antibiotic resistance,the finding prompting us to project prospective control strategies.