TABLE 1.

Bacterial strains used in this study

Bacterial strain	Description	Reference(s)
NTHI 86-028NP	Archived strain originally isolated from the nasopharynx of a child with chronic OM	45
M. catarrhalis 7169	Archived strain originally obtained via tympanocentesis from the middle ear of a child with OM	46
NTHI:ompP2-GFP	NTHI 86-028NP in which expression of GFP is under control of the ompP2 promoter	51
NTHI:pilA-GFP	NTHI 86-028NP in which expression of GFP is under control of the pilA promoter	10
NTHI ΔluxS	NTHI 86-028NP luxS mutant generated by insertion of kanamycin resistance cassette within luxS gene	9, 52
NTHI ΔluxS/pSPEC1-luxS	Complemented NTHI 86-028NP luxS mutant	10, 51