Yersinia species compositions

An immunogenic composition for providing protection to an animal against a pathogen of Yersinia origin comprising:

• a recombinant YscF protein comprising SEQ ID NO:
• 19;
• and
• a pharmaceutically suitable excipient, wherein the protection may be assayed in a mouse challenge model.

A composition produced by a process, the process comprising:

• providing a host cell with an expression vector comprising a nucleotide sequence encoding a YscF protein capable of providing protection to an animal against a pathogen of Yersinia origin, the nucleotide sequence encoding a YscF protein comprising SEQ ID NO:
• 19;
• expressing the nucleotide sequence in the host cell to produce the YscF protein;
• collecting the YscF protein;
• and
• mixing the collected YscF protein with a suitable excipient.

A composition comprising:

• an isolated or recombinant YscF protein capable of providing protection to an animal against a pathogen of Yersinia origin, the isolated or recombinant YscF protein comprising SEQ ID NO:
• 19, wherein the protection may be assayed in a mouse challenge model;
• and
• a pharmaceutically acceptable excipient.

A kit for detecting an antibody capable of binding a YscF protein, the kit comprising:

• an isolated or recombinant YscF protein comprising SEQ ID NO:
• 19;
• means for detecting binding between the isolated or recombinant YscF protein and the antibody capable of binding the YscF protein;
• and
• a suitable liquid vehicle.