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Advantages of peptide nucleic acid oligonucleotides for sensitive site directed 16S rRNA fluorescence in situ hybridization (FISH) detection of Campylobacter jejuni, Campylobacter coli and Campylobacter lari

Lehtola, M.J., Loades, C.J. and Keevil, C.W. (2005) Advantages of peptide nucleic acid oligonucleotides for sensitive site directed 16S rRNA fluorescence in situ hybridization (FISH) detection of Campylobacter jejuni, Campylobacter coli and Campylobacter lari Journal of Microbiological Methods, 62, (2), pp. 211-219. (doi:10.1016/j.mimet.2005.02.009).

Record type: Article

Abstract

Traditionally fluorescence in situ hybridization (FISH) has been performed with labeled DNA oligonucleotide probes. Here we present for the first time a high affinity peptide nucleic acid (PNA) oligonucleotide sequence for detecting thermotolerant Campylobacter spp. using FISH. Thermotolerant Campylobacter spp, including the species Campylobacter coli, Campylobacter jejuni and Campylobacter lari, are important food and water borne pathogens. The designed PNA probe (CJE195) bound with higher affinity to a previously reported low affinity site on the 16S rRNA than the corresponding DNA probe. PNA also overcame the problem of the lack of affinity due to the location of the binding site and the variation of the target sequence within species. The PNA probe specificity was tested with several bacterial species, including other Campylobacter spp. and their close relatives. All tested C. coli, C. jejuni and C. lari strains were hybridized successfully. Aging of the Campylobacter cultures caused the formation of coccoid forms, which did not hybridize as well as bacteria in the active growth phase, indicating that the probe could be used to assess the physiological status of targeted cells. The PNA FISH methodology detected C. coli by membrane filtration method from C. coli spiked drinking water samples.

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Published date: August 2005
Keywords: campylobacter, FISH, hybridization, PNA, probe

Identifiers

Local EPrints ID: 56801
URI: http://eprints.soton.ac.uk/id/eprint/56801
ISSN: 0167-7012
PURE UUID: 07e0988f-9b91-4ab0-81df-e82622319b08
ORCID for C.W. Keevil: ORCID iD orcid.org/0000-0003-1917-7706

Catalogue record

Date deposited: 11 Aug 2008
Last modified: 17 Jul 2017 14:30

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Contributors

Author: M.J. Lehtola
Author: C.J. Loades
Author: C.W. Keevil ORCID iD

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