Étude bactériologique et phénotypes de résistance des germes responsables d’infections urinaires dans un CHU de Tunis : à propos de 1930 cas

Abstract

Method. – A retrospective study was performed by the microbiology laboratory of the Tunis La Rabta hospital, on strains isolated from 1.930 urinary tract infection (UTI) over 2 years (1996–1998). Results. – Utis were most frequent in ambulatory practice (69.1%). Women were more concerned than men (sex-ratio 3.15). Enterobacteriacae were the most frequently identified strains (≈ 88%) including Escherichia coli (69.5%). Gram-positive strains (9.8%) were often Staphylococcus saprophyticus (4.7%). The identified strains presented natural resistance and a high frequency of acquired resistance to bêtalactams (57.9% of E. coli) and trimethoprim (46.9% of E. coli). Some enterobacteriacae strains were found to produce extended spectrum bêtalactamase (13.8% of Klebsiella pneumoniae). Comments. – In every case, antibiotherapy should have been prescribed after performing an antibiogram for each strains.