Newcastle disease virusNewcastle DiseaseVirulenceHN ProteinChickensViral Fusion ProteinsPoultry DiseasesSequence Analysis, DNASpecies SpecificityMolecular Sequence DataViral VaccinesChick EmbryoGenes, BacterialMutationStreptococcus suisDNA, BacterialVirulence FactorsVaccines, AttenuatedAmino Acid SequenceBacterial ProteinsStruthioniformesHemadsorptionCulture MediaBrucella abortusInterferonsPhylogenyAntigens, BacterialMice, Inbred StrainsBacterial Typing TechniquesEscherichia coliNeuraminidaseHaemophilus parasuisGenome, BacterialMice, Inbred BALB CSerotypingPlasmidsRNA, Ribosomal, 16SAntibodies, ViralBase SequencePolymerase Chain ReactionCell LineRNA, ViralVirus ReplicationViral ProteinsLethal Dose 50Bacterial VaccinesGenotypeHemagglutination, ViralDNA, RibosomalCloacaParamyxoviridaeMycobacterium tuberculosisSpecific Pathogen-Free OrganismsPoultryBrucella VaccineHemagglutinins, ViralFlavobacteriaceae InfectionsMycobacterium aviumGenetic VariationPhenotypeGenome, ViralDisease OutbreaksAnti-Bacterial AgentsGene Expression Regulation, BacterialBacterial AdhesionCluster AnalysisClassical Swine FeverAntibodies, BacterialFish DiseasesNucleic Acid HybridizationTemperatureMicrobial Sensitivity TestsCloning, MolecularBacterial Outer Membrane ProteinsBirnaviridae InfectionsSwineRecombination, GeneticNocardia asteroidesMycoplasma arthritidisVirus CultivationSalmonella typhimuriumAvulavirusFrancisella tularensisSpleenCercopithecus aethiopsPlant DiseasesParainfluenza Virus 1, HumanStreptococcal InfectionsRinderpest virusMacrophagesClassical swine fever virusVaccinationVero CellsSwine DiseasesElectrophoresis, Polyacrylamide GelRNA, BacterialRabbitsColony Count, MicrobialViral Plaque AssayEngland