Nipple Aspirate FluidNipplesBiopsy, NeedleSuctionNasopharynxBiopsy, Fine-NeedleBone Marrow ExaminationBone MarrowSensitivity and SpecificityTracheaCytodiagnosisBody FluidsRespiratory AspirationRespiratory Tract InfectionsSpecimen HandlingLeishmaniasis, VisceralPolymerase Chain ReactionGastric JuiceGastric LavageTuberculosis, Lymph NodeRespiratory Distress Syndrome, NewbornBronchopulmonary DysplasiaInfant, NewbornRespiratory Syncytial VirusesGastrointestinal ContentsRespiratory Syncytial Virus InfectionsPneumonia, AspirationBone Marrow CellsBiopsyFluorescent Antibody Technique, DirectMaxillary SinusitisIntestinal SecretionsThyroid NoduleIliumRespirovirus InfectionsMaxillary SinusBreast NeoplasmsBodily SecretionsBronchoscopyTherapeutic IrrigationDuodenumVirologyProspective StudiesIntubation, GastrointestinalSputumPneumonia, Ventilator-AssociatedGranulocyte Precursor CellsMicrosporidaVirusesLymph NodesRespiratory Syncytial Virus, HumanUreaplasma urealyticumRespiration, ArtificialUreaplasma InfectionsIntubation, IntratrachealAzure StainsNoseInhalationReproducibility of ResultsEvaluation Studies as TopicBronchiolitis, ViralBacteriological TechniquesPneumonia, BacterialBreastSuppurationPeriapical AbscessStaining and LabelingBone Marrow DiseasesHistocytological Preparation TechniquesVirus DiseasesMetapneumovirusThyroid NeoplasmsCarcinoma, Papillary, FollicularBronchoalveolar Lavage FluidParamyxoviridae InfectionsTumor Markers, BiologicalPredictive Value of TestsPneumonia, ViralGastric Acidity DeterminationInfant, PrematureLymphadenitisBacteria, AerobicRetrospective StudiesHemosiderinReverse Transcriptase Polymerase Chain ReactionNasal Lavage FluidHuman bocavirusBronchopneumoniaFlow CytometryDog DiseasesLeishmaniaDouglas' PouchPrussian Blue ReactionBreast DiseasesBronchoalveolar LavageAcute DiseaseAdenofibromaStomachLeishmania infantumMicrobiological Techniques