RESUMEN
Objective To investigate the clinical application significance of flow cytofluroometric(FCM ) antibiotic susceptibility test for A .baumannii in vitro .Methods The sensitivity to Ampicillin/Sulbactam ,Levofloxacin ,Meropenem ,Cefotaxime of an Esch‐erichia coli standard strain and 66 isolates of A .baumannii were tested with FCM by using propidium iodide as a fluorescent probe . The survival rates of the bacteria in the culture after treatment with different dosages of the antibiotics were determined according to the fluorescence strength .The MIC value of the antibiotics against the 66 strains were judged with FCM ,compared with microdi‐lution and VITEK methods .Results The antibiotic resistant strains number of sultamicillin ,levofloxacin ,meropenem and cefo‐taxime sodium were 35 ,30 ,13 and 38 respectively in flow cytofluorometric antibiotic sensitivity test(FCST) of 66 strains of A .bau‐mannii .There was no significant difference(P>0 .05) compared with the antibiotic susceptibility results by the methods of VITEK instrument and microdilution by measuring with χ2 test respectively .Conclusion The established method of FCST for A .baumannii is suitable for dectecting bacterial drug‐sensitivity ,which is more rapid ,accurate and objective .