Isolation and drug resistance phenotype distribution of carbapenemresistant Klebsiella pneumoniae in a hospital

Abstract:

ObjectiveTo analyze drug resistance phenotypes and clinical distribution characteristics of clinically isolated carbapenemresistant Klebsiella pneumoniae(CRKP), and provide evidence for rational use of antimicrobial agents and control of healthcareassociated infection(HAI). MethodsCRKP isolated from inpatients in a hospital in 2013-2015 were collected, sources of specimens and homology of antimicrobial susceptibility of pathogens were analyzed. ResultsOf 949 nonrepetitive strains of Klebsiella pneumoniae, 75(7.90%) were CRKP strains. The detection rates of CRKP from 2013 to 2015 were 1.35%, 7.77%, and 17.04% respectively, which showed an upward trend year by year, difference was statistically significant（P＜0.01）. The main infection sites of CRKP were respiratory tract and urinary tract, CRKP mainly distributed in intensive care unit(ICU), geriatrics and emergency departments. Susceptibility rates of CRKP to amikacin and trimethoprim / sulfamethoxazole were 57.33% and 48.00% respectively. 22 (29.33%) cases of CRKP infection were communityacquired and 53 (70.67%) were healthcareassociated infection. 18 （24.00%）cases died among 75 CRKP infected patients. According to drug resistance phenotype analysis, there were 5 clones of CRKP strains, mainly distributed in ICU, geriatrics and emergency departments.ConclusionThe proportion of CRKP infection is increasing year by year, clinical monitoring on CRKP should be strengthened, intensive infection control measures should be tarken, so as to prevent and control the spread and prevalence of CRKP.