Chromogenic CompoundsEnzyme-Linked Immunosorbent AssayAntibodies, BacterialImmunoglobulin GSensitivity and SpecificityAntibodies, ViralImmunoglobulin MSerologic TestsCross ReactionsAntigens, BacterialAntibody SpecificityAntibodies, MonoclonalImmunoglobulin AImmunoenzyme TechniquesEvaluation Studies as TopicAntigens, ViralAntibodies, ProtozoanReagent Kits, DiagnosticCattle DiseasesAntibodies, HelminthCattleEpitopesComplement Fixation TestsSeroepidemiologic StudiesRecombinant ProteinsAutoantibodiesRabbitsBlotting, WesternMolecular Sequence DataMolecular StructureAntibodiesAntigens, ProtozoanCells, CulturedNeutralization TestsImmunosorbent TechniquesAntigens, HelminthFecesBiological MarkersHemagglutination TestsFluorescent Antibody TechniqueImmunoblottingImmunoassayMice, Inbred BALB CAgglutination TestsSulfur Compounds