Abstract: The present invention relates to a nucleic acid sequence isolated from C. coli which hybridizes specifically with the genomic nucleic acid of strains belonging to the species C. coli and which does not hybridize under the usual conditions with the nucleic acids of campylobacteria which do not belong to this species, nor with the genomic nucleic acids of bacteria related to the genus Campylobacter.

Abstract: The subject of the present invention is thus a nucleotide sequence which hybridizes specifically with a Campylobacter jejuni genomic nucleic acid sequence chosen from the nucleotide sequence SEQ ID No. 1, the nucleotide sequence SEQ ID No. 2 the sequences complementary to the latter, as well as the sequences differing therefrom by nutation, insertion, deletion or substitution of one or more bases, and which does not or virtually does not hybridize with nucleic acids from other Campylobacter species.Fragments of this sequence can be used as specific primers for the amplification of sequences specific for Campylobacter jejuni and as nucleic probes specific for Campylobacter jejuni nucleic sequences.The subject of the invention is also a method of detecting the presence of Campylobacter jejuni stains in a biological sample, as well a kit for carrying out the method.