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- W2078756140 abstract "The use of nucleic acid probes has become an increasingly common method for detecting pathogenic micro-organisms in clinical specimens. In the course of our efforts to isolate species-specific DNA probes for bacterial pathogens, we encountered a special problem with regard to Neisseria gonorrhoeae. As a consequence of the high degree of DNA homology that this organism displays with its nearest relative, Neisseria meningitidis, the isolation of such probes could not be readily achieved. We therefore developed a novel method of probe isolation which overcomes this problem. This methodology relies upon the application of a 'sandwich' hybridization assay to screen an M13 'shotgun' library derived from N. gonorrhoeae genomic DNA. For this, genomic DNA from N. gonorrhoeae and N. meningitidis was immobilized on nitrocellulose filters and probed with recombinant phage DNA from candidate clones. Those clones which had hybridized to target sequences were then detected using labelled vector sequences in a second hybridization step. By this means we obtained a numerical assessment of the degree of specificity of candidate clones for the target organism as compared to one or more related species. Using this technique we have isolated three DNA probes which are highly specific for N. gonorrhoeae and which display no cross-reactivity with N. meningitidis or other members of the Neisseriaceae. This paper presents the basis of the methodology and describes the isolation and characterization of three N. gonorrhoeae-like specific probes." @default.
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- W2078756140 date "1989-03-01" @default.
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- W2078756140 title "Isolation of a species-specific DNA probe for Neisseria gonorrhoeae using a novel technique particularly suitable for use with closely related species displaying high levels of DNA homology" @default.
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- W2078756140 doi "https://doi.org/10.1016/0890-8508(89)90033-9" @default.
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