Resistencia a antibioticos de bacilos gram negativos aislados en unidades de cuidados intensivos. Analisis comparativo de dos periodos (1998-2001)

The incidence and drug susceptibility of gram-negative isolates from clinical samples of patients from different intensive care units at the Hospital de Clinicas Jose de San Martin were analysed. Two hundred isolates during the same five months period, in two different years (1998 and 2001) were obtained and evaluated. Acinetobacter spp., was the most frequently isolated microorganism. Resistance to imipenem was observed in 60% of these isolations while resistance to 3rd generation cephalosporin and ciprofloxacin was observed in more than 80%. Klebsiella pneumoniae was not resistant to imipenem, the resistance to 3rd and 4th generation cephalosporins decreased from 71.4 to 30% of isolates (p