Journal Detail Information

Objective To investigate the antimicrobial resistance among Acinetobacter baumannii isolated from 7 teaching hospitals at different cities in China from 2004 to 2005.Methods A total of 1 787 nonduplicate A.baumannii isolates were collected.The antimicrobial susceptibility was determined by disk diffusion method in every center.All the data were analyzed by WHONET 5.3 software.Results Imipenem(65.1% susceptible)and meropenem(56.8% susceptible)were the most active agents against A.baumannii,followed by cefoperazone-sulbactam(43.5% susceptible,30.1% intermediate)and ampicillin-sulbactam(39.2% susceptible,16.3% intermediate).The susceptibility rate of A.baumannii to other antimicrobial agents ranged from 2.2% to 34%.Antimicrobial susceptibility pattern varied in different cities.About 52.1% and 76.8% of the imipenem non-susceptible strains were also resistant to cefoperazone-sulbactam or ampicillin-sulbactam,respectively.More than 81% were resistant to any of the other antimicrobial agents.Imipenem-susceptible strains also showed lower resistance to meropenem(11%),cefoperazone-sulbactam(12.5%)and ampicillin-sulbactam(29.1%),but higher resistance to other antimicrobial agents(41.6%-58.4%).Conclusions Carbapenems are still the most active agent against A.baumannii.However,nearly 43.1% of A.baumannii strains are resistant to carbapenems.Such resistant strains are prevalent in some regions.Cefoperazone-sulbactam is the second most active agent against A.baumannii only next to carbapenems,especially for carbapenem-resistant A.baumannii(CRAB).

7

Cite

Share

CHINET 2005 surveillance of antimicrobial resistance in Pseudomonas aeruginosa in China

Yuxing NI

Chinese Journal of Infection and Chemotherapy.2006;0(04):-.

Objective To investigate the resistance of clinical isolates of P.aeruginosa in China during 2005.Methods Clinical isolates of P.aeruginosa from 7 teaching hospitals in China were collected and antimicrobial susceptibility were tested by Kirby-Bauer method.Results A total of 2 323 clinical isolates of P.aeruginosa were collected.The resistance rates of P.aeruginosa to antimicrobial agents from low to high were amikacin(22.5%),cefoperazone-sulbactam(22.8%),cefepime(27.6%),ceftazidime(28.9%),imipenem(31.3%),ciprofloxacin(31.7%),meropenem(33.7%),piperacillin-tazobactam(34.4%),aztreonam(36.8%),piperacillin(44.2%),ticarcillin-clavulanic acid(50.9%).Multi-drug resistant(MDR)and pan-drug resistant(PDR)strains accounted for 8.4% and 4.2%,respectively.Some(36.7%-53.4%)of the strains resistant to other antimicrobial agents were still susceptible to amikacin.Therefore,combination therapy of ?-lactams plus an aminoglycoside is usually indicated for serious infections caused by P.aeruginosa.By 'interpretative reading' of the susceptibility pattern of 'predictive drugs',we can predict the underlying resistance mechanisms.Conclusions The surveillance data indicate that the resistance of P.aeruginosa in China is relatively serious and its resistance mechanisms are very complicated.Close attention should be paid to this problem by physicians and clinical laboratory.

8

Cite

Share

Surveillance of antibiotic resistance in clinical isolates from Shanghai Huashan Hospital in 2005

Fupin HU ; Xinyu YE ; Peicheng WU ; Shi WU ; Demei ZHU ; Fu WANG

Chinese Journal of Infection and Chemotherapy.2006;0(04):-.

Objective To investigate the resistance of clinical isolates from Shanghai Huashan Hospital in 2005.Methods Antimicrobial susceptibility test was carried out by Kirby-Bauer method.Results were analyzed according to CLSI 2005.Results Of the 3 896 clinical isolates,gram negative bacilli and gram positive cocci accounted for 68.1% and 31.9% respectively.About 93.2%(465/499)of S.aureus isolates were identified as methicillin-resistant Staphylococcus,94.9%(260/274)of coagulase negative Staphylococcus(CNS)isolates were methicillin-resistant.No vancomycin-resistant strain was found.The resistance rates of E.faecalis and E.faecium to high level gentamicin(120 ?g)were 67.4% and 82.8% respectively.Two strains of VRE were isolated.Both were VanA type.ESBLs-producing strains accounted for 47.6%(206/433)in E.coli and 69.6%(391/562)in Klebsiella spp(K.pneumoniae and K.oxytoca).Isolates of Enterobacteriaceae were still highly sensitive to imipenem and meropenem,resistance rates being 0-4% except Citrobacter isolates,9.1% of which were resistant.However,39.3% and 59.6% of P.aeruginosa strains were resistant to the above carbapenems,respectively.Conclusions The prevalence of MRSA and MRCNS is very high.ESBLs are prevalent in E.coli and Klebsiella spp.Two glycopeptide-resistant E.faecium isolates are identified firstly in Huashan Hospital.Our data will be useful for rational use of antimicrobial agents in the treatment of bacterial infections.

DISPLAY OPTIONS

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share