Table 8.

Comparison of antibiogram (% R) of 69 viridans streptococci strains isolated from subgingival plaque and 13 viridans streptococci isolated from blood of infective endocarditis patients (n = 17).

Viridans streptococci Species	PEN		AMP		FEP		CTX		CRO		VAN		ERY		AZM		CLR		TCY		LVX		OFX		CLI		QDA		LNZ
	%R		%R		%R		%R		%R		%R		%R		%R		%R		%R		%R		%R		%R		%R		%R
	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd	Pq	Bd
S. mitis	42	60	25	80	25	60	42	40	25	40	0	0	67	80	50	80	33	40	25	60	17	80	33	40	58	60	33	40	0	0
S. oralis	21	67	14	33	21	33	21	33	14	33	0	0	50	67	71	33	14	33	14	33	21	67	14	67	36	33	21	33	0	0
S. sanguinis	0	40	10	40	20	20	30	40	20	0	0	0	50	60	40	40	20	40	10	60	20	40	10	60	30	40	10	0	0	0
S. parasanguinis	0	–	0	–	100	–	100	–	0	–	0	–	0	–	100	–	0	–	0	–	0	–	0	–	100	–	0	–	0	–
S. gordonii	0	–	0	–	100	–	0	–	100	–	0	–	100	–	100	–	0	–	0	–	0	–	100	–	0	–	0	–	0	–
S. anginosus	0	–	0	–	100	–	0	–	0	–	0	–	100	–	100	–	0	–	0	–	0	–	0	–	0	–	0	–	0	–
S. constellatus	0	–	0	–	0	–	20	–	0	–	0	–	0	–	60	–	20	–	0	–	0	–	20	–	40	–	0	–	0	–
S. mutans	0	–	0	–	29	–	14	–	14	–	0	–	43	–	57	–	43	–	29	–	43	–	29	–	43	–	0	–	0	–
S. sinensis	0	–	0	–	100	–	0	–	0	–	0	–	0	–	100	–	0	–	0	–	0	–	0	–	100	–	0	–	0	–
G. adiacens	0	–	0	–	20	–	20	–	0	–	0	–	20	–	40	–	20	–	20	–	0	–	0	–	20	–	0	–	0	–
G. elegans	17	–	17	–	17	–	25	–	17	–	0	–	42	–	50	–	17	–	17	–	25	–	8	–	25	–	17	–	0	–

VGS—viridans group streptococci, Pq—plaque, Bd—blood, AMP—ampicillin, AZM—azithromycin, CLI—clindamycin, CLR—clarithromycin, CRO—cefitriaxone, CTX—cefotaxime, ERY—erythromycin, FEP—cefepime, LNZ—linezolid, LVX—levofloxacin, OFX—ofloxacin, PEN—penicillin, QDA—quinupristin/dalfopristin, TCY—tetracycline, VAN—vancomycin.

There was no statistically significance difference (p > 0.05) between antimicrobial pattern of resistance of subgingival plaque and blood isolates of infective endocarditis with periodontitis except S. mitis to levofloxacin (Fisher's exact test was used).