Changes in drug resistance and distribution of Streptococcus pneumonia infection from 2001 to 2011 in Shenyang area / 中国小儿急救医学

ABSTRACT

Objective To investigate the dynamic changes of infectious distribution,current resistant situation of Streptococcus pneumoniae(SP) and resistant to penicillin and other 10 kinds of antibiotics for the guidance of clinical therapy of SP.Methods Bacteria were identified by French BioMerieux API identification system,VITEK 2-COMPACT identification system and Optochin test,bile solubility test.In vitro,drug susceptibility test to penicillin,cefotaxime,and other 10 kinds of antibiotics were conducted with K-B disk diffusion method combined with the concentration gradient method.Drug susceptibility results were analyzed from 2001 to 2011.Results In recent 11 years,SP antimicrobial resistance rate had increased year after year,especially rates of penicillin-resistant and penicillin not-sensitive had increased significantly,rising from 8.3％( in 2001 ) to 72.7％ ( in 2011 ) ( meningitis 86.4％,non-meningitis 59.0％ ).Resistance rate of cefotaxime,belonging to third-generation cephalosporin had already accounted for 54.0％ ( meningitis 64.0％,non-meningitis 44.0％ ) ;and the resistance rate of macrolide antimicrobial was 100％ ; vancomycin-resistant strains and linezolid-resistant strains had not been detected.Conclusion Penicillin non-susceptible SP has accounted for a high percentage,antimicrobial resistance of Streptococcus pneumoniae penicillin,cephalosporins,macrolides are in serious condition.Vancomycin and linezolid should be preferred or the right antibiotics be chosen according to vitro susceptibility results of isolates in clinical treatment of severe infections caused by SP.