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Objective To analyze the isolation rates and antimicrobial resistance of Acinetobacter baumannii (AB) from intensive care unit (ICU)between 2010 and 2013,and provide evidence for clinical anti-infective therapy. Methods The isolation and antimicrobial resistance of AB from ICU between 2010 and 2013 were analyzed retro-spectively.Results A total of 1 413 pathogenic strains were isolated,556(39.35%)of which were AB,isolation rates in each year were 39.45%,41 .35%,29.44%,and 40.53% respectively.AB were mainly isolated from lower respiratory tract (75.72%).Antimicrobial susceptibility testing results showed that AB had low resistance rates to cefoperazone/sulbactam(5.85%)and amikacin (17.45%);detection rates of multidrug-resistant and extensively drug-resistant AB increased from 9.63% and 3.70% to 42.50% and 31 .88%,respectively (both P < 0.001 ). Conclusion AB is the common pathogen in ICU,antimicrobial resistance is serious,isolation of multidrug-resistant and extensively drug-resistant AB increased year by year;intensifying the monitoring of drug resistance is helpful for the treat-ment and prevention of AB infection.
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Objective To investigate the types,antimicrobial resistance,and disinfectant resistance of pathogens isolated from hospital environmental inanimate surfaces and hands of health care workers (HCWs).Methods Pathogens isolated from hospital environmental inanimate surfaces and hands of HCWs in intensive care units and general wards in 16 hospitals in Beijing were performed bacterial identification,antimicrobial susceptibility testing,and disinfectant re-sistance testing. The carriage of antimicrobial resistance genes and disinfectant genes in pathogens were also detec-ted.Results A total of 979 specimens were collected from inanimate surfaces and hands of HCWs in 16 hospitals,75 (7.66% )pathogenic strains were isolated,78.67% of which were gram-negative bacilli. The top 3 pathogens were Pseud-omonasaeruginosa (P.aeruginosa,n= 24),Enterobactercloacae (E. cloacae,n= 14),and Klebsiella pneumoniae (K. pneumoniae,n= 4 ). One P. aeruginosa strain was resistant to aztreonam,gentamycin,tobramycin,ciprofloxacin,and levofloxacin;One E. cloacae strain was resistant to piperacillin,7 strains were resistant to nitrofurantoin;4 K. pneumoni-ae strains were all resistant to piperacillin,2 were resistant to cephalosporins,and 1 was resistant meropenem. P. aerugi-nosahad7drug-resistantgenes,positiverateofmirwas100.00% ;E.cloacaehad4drug-resistantgenes,positiveratesof tem 1and shv were both 100.00% ;K. pneumoniae had 5 drug-resistant genes,positive rates of shv and mir were both 100.00% . The resistant rates of P. aeruginosa and E. cloacae to chlorhexidine gluconate were 4.17% and 57.14% re-spectively,to trichloroisocyanuric acid were both 50.00% ,positive rates of drug-resistant genes (qacE△1-sul 1)were 79. 17% and 57.14% respectively;K. pneumoniae had no resistance to two kinds of disinfectant,dug-resistance gene was not found.Conclusion Multiple common pathogens which can cause healthcare-associated infection exist in hospital environ-mental inanimate surfaces and hands of HCWs,which are dominated by gram-negative bacilli,pathogens had resistance to antimicrobial agents and disinfectant in different degrees.
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Objective To investigate prevalence of resistance genes for β-lactams in clinically isolated multidrug-resistant Acinetobacter baumannii (MDRAB)in a hospital.Methods 22 clinically isolated MDRAB strains were performed antimicrobial susceptibility testing,resistance genes forβ-lactams (TEM,SHV,CTX-M,PER,DHA, IMP ,VIM ,SIM,OXA-23,OXA-24,and OXA-58)in these strains were detected with polymerase chain reaction. Results The resistant rates of 22 isolates of MDRAB to ceftazidime,cefotaxime,cefepime,gentamycin,amikacin, ciprofloxacin,and compound sulfamethoxazole were all 100.00%;to imipenem,meropenem,and cefoperazone/sul-bactam were 50.00%,40.91 %,and 31 .82% respectively,intermediated rates were 31 .82%,36.36%,and 31 .82% respectively.The carriage rates of OXA-23,TEM,IMP ,and PER were 100.00% (n =22),72.73 %(n=16),54.55% (n = 12),and 18.18% (n =4)respectively.Detection results of SHV,CTX-M,DHA,VIM , SIM,OXA-24,and OXA-58 were all negative.Conclusion Carriage of IMP ,TEM,PER,and OXA-23 resistance genes are the major resistance mechanisms of MDRAB to β-lactamase antimicrobial agents in this hospital.
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Objective To investigate antimicrobial resistance and change trends ofUreaplasma urealyticum (Uu) from reproductive system of female patients at a traditional Chinese medicine hospital in three consecutive years. Methods Antimicrobial resistance of Uu isolated from gynaecology leucorrhea and cervical secretion specimens of patients of dermatology & sexually transmitted diseases department and gynaecology department from January 2011 to December 2013 were analyzed retrospectively.Results A total of 327 Uu strains were isolated,except resistance rates of Uu to doxycycline(5.23%-6.12%)and josamycin(0-1 .96%)remained at a relatively low level in three consecutive years,resistance rate to the other antimicrobials showed an upward trend year by year,but the difference was not significant (P >0.05).The resistance of Uu to ofloxacin,clarithromycin and sparfloxacin were relatively high(42.11 %-61 .40%),to josamycin,doxycycline and minocycline were lower(0-13.07%),and multidrug re-sistance was serious.Conclusion Antimicrobial resistanc of Uu isolated from reproductive system of female patients in this hospital is high.It is necessary to realize the status and change trends of antimicrobial resistance of Uu for the treatment of disease and control of the emergence of multidrug resistance pathogens.
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Objective To realize the characteristics of clinical distribution of multidrug-resistant organisms (MDRO)in a hospital,and take specific measures for the prevention and control of infection.Methods Surveillance data of 891 MDR isolates detected in a hospital between January 1 and December 31,2012 were analyzed retrospec-tively.Results Of 891 MDR isolates,extended-spectrumβ-lactamase (ESBL)-producing Escherichiacoli ranked first(342,38.39% ),followed by ESBL-producing Klebsiellapneumoniae(195,21.89% ),MDRAcinetobacterbau-mannii(185,20.76% ),methicillin-resistantStaphylococcusaureus(138,15.49% ),MDRPseudomonasaeruginosa (27,3.03% ),ESBL-producingProteusmirabilis(2,0.22% ),and ESBL-producing Klebsiellaoxytoca(2,0.22% );Bacteria mainly concentrated on general intensive care unit(ICU)(163,18.29% ),department of neurology(136, 15.26% ),general surgery(103,11.56% ),neurosurgery(85,9.54% ),and respiratory diseases department(71, 7.97% ).The most common bacteria isolated from sputum was MDR Acinetobacterbaumannii(242,50.63% ),and mainly concentrated on general ICU;the most common bacteria isolated from urine was ESBL-producing Escherich-iacoli(141 ,80.57% ),mainly concentrated on the departments of neurology and urology. Conclusion MDRO infec-tion in this hospital mainly concentrate on lower respiratory tract and urinary system. Monitor on high-risk depart-ments and vulnerable patients should be intensified,targeted preventive measures should be stressed to curb MDRO infection and spread.