RESUMO
Objective To analyze the distribution characteristics of Pseudomonas aeruginosa and Acinetobacter baumannii ,and to investigate the changing pattern of antimicrobial resistance of these strains isolated during 2012 - 2014 .Methods Strains of Pseud‐omonas aeruginosa and Acinetobacter baumannii isolated from January 2012 to December 2014 were collected .Antimicrobial suscep‐tibility of clinical isolates was tested by Kirby‐Bauer method .Results In the past three years ,214 strains of Pseudomonas aerugino‐sa and 347 strains of Acinetobacter baumannii were isolated .The nosocomial infection rate of Pseudomonas aeruginosa decreased year by year ,while the Acinetobacter baumannii ′s increased .Most strains were isolated from sputum ,wound secretion and urine . The strains of Pseudomonas aeruginosa and Acinetobacter baumannii were distributed in various departments of the hospital .The detection rates of these strains were the highest in ICU ,respectively 27 .6% and 34 .9% .Both the resistance rates of Pseudomonas aeruginosa to ceftazidime ,imipenem ,Amikacin and Acinetobacter baumannii to Piperacillin/Tazobactam and imipenem had in‐creased ,while the resistance rates of Acinetobacter baumannii to polymyxin B had decreased with each passing year .Conclusion Pseudomonas aeruginosa and Acinetobacter baumannii causes severe nosocomial infections and the antimicrobial resistance rates in‐creased ,especially the resistance rates to carbapenem are becoming more higher in recent years .Acinetobacter baumannii shows strong antibacterial activity in vitro to Polymyxin B .Therefore ,antimicrobial resistance surveillance should be strengthened to direct rational use of antibiotics .
RESUMO
OBJECTIVE To investigate the distribution and resistance rate of clinical isolates from neonatal sepsis in Hubei hospitals.METHODS The antimicrobial susceptibility of clinical isolates from(neonates) blood culture derived from sixteen hospitals in Hubei from 2000 to 2004,was retrospectively analyzed and tested by KirbyBauer(method).RESULTS A total of 1 019 strains were isolated from blood specimens,Gram-positive and Gram(-negative)(bacteria) accounted for 93% and 7% of these isolates,respectively.The main isolates were coagulase(-negative) staphylococci(CNS,79.8%),Enterococcus spp(7.0%),Staphylococcus aureus(SAU4.5%),Klebsiella spp(1.7%),Stenotrophomonas maltophilia(1.2%),and Escherichia coli(0.9%).71.3% CNS and 19.6% SAU were meticillin resistant,46.5% enterococci resistant to ampicillin and almost strains were susceptible to(vancomycin)(except E.gallinarum).ESBLs were detected in isolates of 56% E.coli and 35% K.pneumoniae.S.maltophilia was susceptible to trimethoprim(-sulfamethoxazole) and levofloxacin with resistance rate of 8.3% and 0%.In strains of other Gram-negative rods,resistance rate to imipenem,amikacin and fluoroquinolones were detected between 0% to 15%,and to cephalosporins Ⅰ-Ⅳ were between 20% to 70%.CONCLUSIONS Gram-positive cocci are important pathogens in neonatal sepsis,antimicrobials should be used on the result of(antimicrobial) susceptibility test.It is more important to reduce health care-associated(nosocomial) infections.