Heterologous Challenge Lipoprotein D Prevents Otitis Media after Adhesin and Haemophilus influenzae Immunogens Derived from a Nontypeable Passive Transfer of Antiserum Specific for

(NTHI) isolate. NTHI residing in the nasopharynx wasrapidly cleared from this site, thus preventing it from ascending the eustachian tube and inducing otitis mediain chinchillas compromised by an ongoing viral upper respiratory tract infection. While LB1 is based solely onone NTHI adhesin, the latter immunogen, LPD-LB1(f)