Otitis MediaEar, MiddleEustachian TubeChinchillaOtitis Media with EffusionOtitisOtitis Media, SuppurativeMiddle Ear VentilationOtitis ExternaCholesteatoma, Middle EarEarTympanic MembraneEar OssiclesOtoscopyTerminaliaEar DiseasesAcoustic Impedance TestsHearing LossPneumococcal InfectionsEar, InnerEar CanalStreptococcus pneumoniaeHaemophilus influenzaeEar NeoplasmsMastoidEar, ExternalMastoiditisHaemophilus InfectionsTympanic Membrane PerforationTympanoplastyCulture MediaTemporal BoneMalleusHearing Loss, ConductiveAcute DiseaseOtologic Surgical ProceduresStapesOceanic Ancestry GroupNasopharynxIncusMoraxellaceae InfectionsMoraxella (Branhamella) catarrhalisOssicular ProsthesisLabyrinthitisRecurrenceRound Window, EarStapediusAdenoidsBone ConductionOtolaryngologyEaracheHearingAmoxicillin-Potassium Clavulanate CombinationAmoxicillinAudiometryMucous MembraneTensor TympaniOtoscopesExudates and TransudatesRespiratory Tract InfectionsAdenoidectomyHearing TestsAudiometry, Pure-ToneNasopharyngeal DiseasesGerbillinaeNeisseriaceae InfectionsPneumococcal VaccinesAnti-Bacterial AgentsDisease Models, AnimalDiagnostic Techniques, OtologicalSulfisoxazole