The present study was designed to study the impact of empirical treatment with colistin empirical monotherapy and combined treatment with tigecycline and vancomycin on mortality of bacteremia Multiresistant Acinetobacter Baumannii . The main objective was to evaluate the efficacy of empirical treatment with colistin and combined targeted therapy. The different therapeutical interventions were administered following the routine clinical practice in the medical centre and the investigator did not assign specific interventions to the subjects of the study.

Inclusion Criteria:

• Critics included patients ≥ 16 years with monomicrobial bloodstream infections by multiresistant acinetobacter baumannii to carbapenems and sensitive to colistin accompanied by systemic inflammatory response syndrome, provided they have received targeted treatment with colistin.

Critical patients with monomicrobial bloodstream infections due to monoclonal antibodies were studied; specific criteria were applied for analysis of empirical therapy and targeted therapy (113 patients).