FIG. 2.

Sequence of isolation of cefotaxime-resistant A. baumannii strains as well as the antimicrobial agents prescribed for three patients. Rectangles, periods of hospitalization; black triangles, times of isolation of cefotaxime-resistant A. baumannii from transtracheal aspirate cultures; open triangles, times that cefotaxime-resistant A. baumannii strains from transtracheal aspirate cultures were negative; hatched rectangles, times of probable colonization or infection with CTX-M-2 producers; double-headed arrows, prescription periods during which each antimicrobial agent was prescribed; CLI, clindamycin; LVX, levofloxacin; CFZ, cefazolin; CAZ, ceftazidime; IPM, imipenem-cilastatin; CRO, ceftriaxone; CFP, cefoperazone-sulbactam; ABK, arbekacin; GEN, gentamicin; SBTPC, sultamicillin.