Epidemiology of urinary pathogens in adults during 2005–2006

Abstract number: 1733_831

Apostolidou I., Zoumberi M., Papaefstathiou K., Koloka E., Kouppari G.

Objectives: To find out the frequency and antimicrobial susceptibility of urinary tract pathogens during 2005–2006.

Methods: 10,323 urine samples were examined from 9,399 patients with median age 75 years. The identification of the isolated bacteria was performed by standard methods and the API systems (bioMérieux). The antimicrobial susceptibility testing was carried out by disk diffusion method and interpreted according to NCCLS and the MIC with E-test when was needed.

Results: Positive urine cultures were found in 2,183 patients (23.2%). The microbial strains most frequently isolated from the positive urine cultures were: Escherichia coli (52.6%), Enterococcus spp. (11.1%), Pseudomonas aeruginosa (8.8%), Candida spp. (8.6%), Proteus mirabilis (6.3%), Klebsiella pneumoniae (4.6%), others (7.9%). Of Escherichia coli isolates 54.6% were resistant to ampicillin, 19.3% to amoxicillin+clavulanic acid, 25% to co-trimoxazole, 13.1% to cefaclor, 4.4% to cefotaxime, 4.8% to gentamicin, 8.9% to norfloxacin, 0% to imipenem and 13 (0.9%) produced ESBL. Of Enterococcus spp. isolates 9.7% were resistant to vancomycin and teicoplanin (VanA). In 43 patients the same strain was isolated and from blood culture (2%).

Conclusions: The most common pathogen among isolates from positive urine cultures was E. coli followed by Enterococcus spp. and Pseudomonas aeruginosa. Of E. coli isolates 0.9% produced ESBL. In 2% of the patients with urine infection there was bacteraemia and the same strain was isolated in both urine and blood cultures. Of Enterococcus spp. isolates 29 (9.7%) were resistant to vancomycin and teicoplanin (VanA).

Session Details

Date: 31/03/2007
Time: 00:00-00:00
Session name: European Society of Clinical Microbiology and Infectious Diseases
Location: ICC, Munich, Germany
Presentation type:
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