The present subject matter relates to isolated polypeptide having one of the sequences SEQ. ID. No 8, 9, 10, 11, 12, 13, 14 or fragments or derivatives thereof, having the ability to recognize and bind to a broad range of Salmonella strains. Moreover, the present subject matter further relates to nucleic acid molecules having one of the SEQ. ID. No 1, 2, 3, 4, 5, 6, 7 encoding said recombinant polypeptide or fragments or derivatives thereof, vectors comprising said nucleic acid molecules and host cells comprising either said nucleic acid molecules or said vectors.