[Occurrence of Escherichia coli K1 and K5 strains in patients with urinary tract infections].

1499 E. coli isolates from patients with urinary tract infections were investigated for the presence of K1 and K5 strains using specific phages. K1 antigen was detected in 10,5% and K5 in 6,1% of the strains examined. The strains were isolated in two laboratories with different hospitals and outpatient departments. With respect to the isolation area and isolation time the frequency of K1 and K5 strains was found to be different.