Disease ReservoirsRadionuclide GeneratorsCation Exchange ResinsChromatography, High Pressure LiquidIon Exchange ResinsSilica GelChromatography, Ion ExchangeSilicon DioxideCrown EthersAcetonitrilesAnion Exchange ResinsSpectrophotometry, UltravioletPolystyrenesChromatography, LiquidMethanolSilicatesAdsorptionIonsIndicators and ReagentsAnionsPerchloratesChromatography, Reverse-PhaseAcidsLimit of DetectionSpectrophotometry, AtomicHydrogen-Ion ConcentrationRadioisotopesSolventsChromatography, GelChromatographyFresh WaterReproducibility of ResultsChromatography, Thin LayerRodentiaZoonosesSensitivity and SpecificityAnimals, WildChromatography, AffinityStereoisomerismReference StandardsPhytoplanktonSpectrometry, Mass, Electrospray IonizationTemperatureEutrophicationCladoceraVirus LatencyRiversWater MicrobiologyPhylogenyRodent DiseasesTime FactorsChiropteraPopulation DensityZooplanktonBrazilSeasonsPeromyscusWater MovementsHantavirus InfectionsWater SupplyUrinary Reservoirs, ContinentDisease VectorsHantavirusEnvironmental MonitoringHIV-1Sequence Analysis, DNAIleostomyMolecular WeightRotiferaPolymerase Chain ReactionAnimals, DomesticElectrophoresis, Polyacrylamide GelFecesCopepodaPetroleumArvicolinaeHIV InfectionsDNA, BacterialGeologyBartonella InfectionsMolecular Sequence DataEcosystemTicksProctocolectomy, RestorativeDog DiseasesCarrier StateCommunicable Diseases, EmergingBiodiversityCylindrospermopsisMuridaeIxodesCD4-Positive T-LymphocytesDogsInsect VectorsPopulation DynamicsTick InfestationsHantavirus Pulmonary SyndromeBartonellaEcologyVirus Replication