Specific Pathogen-Free OrganismsChickensPoultry DiseasesGerm-Free LifeChick EmbryoMolecular Sequence DataChicken anemia virusFree RadicalsPlant DiseasesBursa of FabriciusBase SequenceAmino Acid SequenceHost-Pathogen InteractionsVirulenceAvian ProteinsPhylogenyBacterial ProteinsSpecies SpecificitySequence Analysis, DNAMarek DiseaseAvian LeukosisBacteriaCloning, MolecularVirulence FactorsImmunity, InnateInfluenza in BirdsPolymerase Chain Reaction