Capsular polysaccharides (K antigens) are one of the main virulence marker for E. coli strains to cause urinary tract infections and neonatal meningitis. There are 50 chemically different capsular K antigens found, in which only a few are associated with infective E.coli strains.We have taken this study to detect the gene responsible for expression of K1 polysaccharide in E. coli isolates. 3/20 (15%) clinical isolate of urinary isolates of E.coli was found to harbour neuCgene.The pathogenicity of urinary tract infections by these pathogens might be crucially played by this gene encoding K capsular polysaccharide.