P076: Analysis of resistance, virulence, and phylogenetic groups of Escherichia coli strains isolated from very-low birth weight infants in Poland

Methods A total of 90 E.coli (EC) were collected in 2009-2011. Isolates coming from bloodstream infections (BSI) 24, respiratory tract (RT) 50, urinary tract infections -8 and others 8 were tested. Species was determined with the Vitek system, drug resistance was determined by disc diffusion method (according to EUCAST). The nucleotide sequences of beta-lactamases were obtained. Isolates were checked for the presence of 16 selected VF genes associated with extraintestinal infections and classified into 4 ECOR groups using PCR. Clone ST131 was detected. Genotyping was carried out using PFGE.