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The genes coding for F11 fimbriae from the uropathogenic Escherichia coli C1976 were cloned by a cosmid cloning procedure. Two cosmid clones expressed F11 fimbriae and these clones possessed an identical DNA fragment of 8.9 kb. This fragment was subcloned into pBR322 and this plasmid still produced fimbriae and caused a mannose-resistant haemagglutination (MRHA). Polyclonal and monoclonal antibodies were produced against purified cloned F11 fimbriae. Both types of antibodies were used in inhibition tests of MRHA and adherence of bacteria to the uroepithelial cell line T24. After preincubation of bacteria with polyclonal antiserum the MRHA and the MR adherence were totally inhibited. Preincubation of bacteria with monoclonal antibodies did not inhibit MRHA and MR adherence.
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Ree et al. (1985) studied this question.
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