Haemophilus influenzae nontypeable Haemophilus influenzae 2015-04-30T13:42:32Z A condition in which the primary influencing factor is one or more nontypeable strain(s) of Haemophilus influenzae (NTHi). NTHi refers to any unencapsulated strain of the Gram-negative, coccobacillary, facultatively anaerobic bacterium species Haemophilus influenza. Such bacteria lack the capsular antigens used to serotype strains and therefore cannot be classified by serology. NTHi strains are the important pathogens in chronic and recurrent otitis media in children. NTHi XCO:0000480 experimental_condition_ontology jsmith