Abstract: There is disclosed compositions and methods relating to or derived from anti-AIP2 antibodies. More specifically, there is disclosed fully human antibodies that bind AIP2, AIP2-binding fragments and derivatives of such antibodies, and AIP2-binding polypeptides comprising such fragments. Further still, there is disclosed nucleic acids encoding such antibodies, antibody fragments and derivatives and polypeptides, cells comprising such polynucleotides, methods of making such antibodies, antibody fragments and derivatives and polypeptides, and methods of using such antibodies, antibody fragments and derivatives and polypeptides, including methods of treating or diagnosing subjects having AIP2 related disorders or conditions. There is also disclosed a method to treat S. aureus infections by administering an anti-AIP2 antibody described herein.