because bacteria are known to persist in middle ear effusions for extended periods of time despite the presence of increasing titers of specific antibody in both sera and middle ear fluids in humans , we examined the ability of postinfection serum to opsonize haemophilus influenzae ( nontypable and type b ) for phagocytosis by middle ear macrophages in chinchillas .
C0029883
middle ear effusions
C0013455
middle ear