Abstract: Campylobacter jejuni is a commensal of up to 83.1% of Irish broiler chickens[1] and it has the ability to cause severe gastrointestinal infection in humans. Phage against C. jejuni have been previously isolated and proven effective in reducing C. jejuni numbers in live poultry and contaminated carcass skin [2][3]. The lytic type 3 C. jejuni phage vB_CjeM_Los1 was isolated from a poultry faecal sample in a Cork slaughterhouse and it has proven ability to lyse C. jejuni strains isolated from both poultry and clinical origin. This phage has been sequenced, characterised bioinformatically and was also aligned with other sequenced Campylobacter type 3 phage to analyse conservation.