A method of identifying Campylobacter jejuni Penner type in a sample suspected of containing Campylobacter jejuni DNA by polymerase chain reaction, comprising: (a) subjecting DNA from said sample to a PCR amplification reaction using PCR primer pairs targeting the O-methyl phosphoramidate synthesis region, heptose synthesis and hyper-variable region of the polysaccharide capsule loci of Campylobacter jejuni, wherein said PCR primer pairs hybridize to polysaccharide capsule loci encoding heat-stable antigens from Penner types selected from HS2, HS3, HS4A, HS6, HS10, HS15, HS31, HS41, HS53, HS1 complex, HS17, HS8, HS4B, HS23/36, HS42, and HS44, wherein said primer pairs are grouped in an alpha mix and a beta mix with the alpha and beta mixes separately added to an unknown DNA sample in order to produce a PCR amplification product difference of at least 20 bp, said alpha mix comprising one or more primer pair nucleotide sequences selected from the group consisting of: SEQ ID NO: 1 and SEQ ID NO: 2; SEQ ID NO: 3 and SEQ ID NO: 4; SEQ ID NO: 5 and SEQ ID NO: 6; SEQ ID NO: 7 and SEQ ID NO: 8; SEQ ID NO: 9 and SEQ ID NO: 10; SEQ ID NO: 11 and SEQ ID NO: 12; SEQ ID NO: 13 and SEQ ID NO: 14; SEQ ID NO: 15 and SEQ ID NO: 16; said beta mix comprising one or more primer pair nucleotide sequences selected from the group consisting of: SEQ ID NO: 17 and SEQ ID NO: 18; SEQ ID NO: 19 and SEQ ID NO: 20; SEQ ID NO: 21 and SEQ ID NO: 22; SEQ ID NO: 23 and SEQ ID NO: 24; SEQ ID NO: 25 and SEQ ID NO: 26; SEQ ID NO 27 and SEQ ID NO: 28; (b) analyzing amplification products resulting from said amplification reaction by size determination; and (c) determining the Penner type based on the amplification products produced. (a) subjecting DNA from said sample to a PCR amplification reaction using PCR primer pairs targeting the O-methyl phosphoramidate synthesis region, heptose synthesis and hyper-variable region of the polysaccharide capsule loci of Campylobacter jejuni, wherein said PCR primer pairs hybridize to polysaccharide capsule loci encoding heat-stable antigens from Penner types selected from HS2, HS3, HS4A, HS6, HS10, HS15, HS31, HS41, HS53, HS1 complex, HS17, HS8, HS4B, HS23/36, HS42, and HS44, wherein said primer pairs are grouped in an alpha mix and a beta mix with the alpha and beta mixes separately added to an unknown DNA sample in order to produce a PCR amplification product difference of at least 20 bp, said alpha mix comprising one or more primer pair nucleotide sequences selected from the group consisting of: SEQ ID NO: 1 and SEQ ID NO: 2; SEQ ID NO: 3 and SEQ ID NO: 4; SEQ ID NO: 5 and SEQ ID NO: 6; SEQ ID NO: 7 and SEQ ID NO: 8; SEQ ID NO: 9 and SEQ ID NO: 10; SEQ ID NO: 11 and SEQ ID NO: 12; SEQ ID NO: 13 and SEQ ID NO: 14; SEQ ID NO: 15 and SEQ ID NO: 16; said beta mix comprising one or more primer pair nucleotide sequences selected from the group consisting of: SEQ ID NO: 17 and SEQ ID NO: 18; SEQ ID NO: 19 and SEQ ID NO: 20; SEQ ID NO: 21 and SEQ ID NO: 22; SEQ ID NO: 23 and SEQ ID NO: 24; SEQ ID NO: 25 and SEQ ID NO: 26; SEQ ID NO 27 and SEQ ID NO: 28; (b) analyzing amplification products resulting from said amplification reaction by size determination; and (c) determining the Penner type based on the amplification products produced.