Abstract
Two hundred and thirty-seven bacterial strains, isolated from patients with urinary tract infections, were examined for the presence of plasmid-determined fimbrial adhesions. Ninety-nine strains were capable of producing mannose-resistant haemagglutination. Seventeen of these strains possessed transferable resistance plasmids and 11 of these were also able to transfer the mannose-resistant haemagglutination gene, suggesting that it was carried on the R plasmid or had been mobilized by it.