title: Penguin mystery.
authors.forename: O
authors.initials: O
authors.lastname: Swarbrick
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000821:virology*; D001717:Birds; D018175:Birnaviridae Infections / Q000662:veterinary* / Q000821:virology; D007243:Infectious bursal disease virus / Q000302:isolation & purification*