TABLE 4.

Susceptibilities of parent H. influenzae strains and their selected mutants with alterations in ribosomal protein L4^a

Strain	MIC (μg/ml)					Detected mutation(s)
	ERY	AZM	CLR	CLI	Q-D
Parent 3	8	2	4	32	2
C3b	64	8	64	256	8	G65D
Parent 5	4	2	8	16	2
C5	32	>128	32	32	32	Delc 65GR
Parent 10	16	4	16	16	4
C10	128	16	128	4	8	G53A, Del 66RA

^aAbbreviations: ERY, erythromycin; AZM, azithromycin; CLR, clarithromycin; CLI, clindamycin; Q-D, quinupristin-dalfopristin.

^bMutant strain designations are formed by the first letter of the antibiotic (A for AZM and C for CLR) and the number of parent strain used for selection.

^cDel, deletion.