TABLE 3.

Antibiotic susceptibilities of Helcococcus species^a

Antibiotic	MIC (μg/ml)
	H. seattlensis sp. nov. F5780	H. kunzii F7676	H. kunzii F5450	H. sueciensis F6341	H. sueciensis F6503
Penicillin	0.06	0.25	<0.03	<0.03	0.06
Cefuroxime	<0.5	<0.5	<0.5	<0.5	<0.5
Ceftriaxone	<0.12	0.25	<0.12	<0.12	<0.12
Cefotaxime	<0.12	<0.12	<0.12	<0.12	<0.12
Cefepime	<0.5	<0.5	<0.5	<0.5	<0.5
Amoxicillin-clavulanic acid	<2/1	<2/1	<2/1	<2/1	<2/1
Gentamicinb	1	16	8	8	8
Vancomycin	1	<0.5	<0.5	4	1
Linezolid	2	4	2	2	2
Azithromycinc	<0.25	1	>2	<0.25	>2
Erythromycin	0.5	1	>256	<0.25	>256
Tetracycline	<1	<1	<1	<1	<1
Tigecycline	<0.015	0.03	<0.015	<0.015	0.03
Daptomycin	<0.06	0.5	0.5	0.12	0.12
Clindamycin	0.25	0.5	0.5	<0.12	>256
Moxifloxacin	4	<1	2	<1	8
Levofloxacin	16	1	1	<0.5	8
Trimethoprim-sulfamethoxazole	>4/76	>4/76	>4/76	>4/76	>4/76
Meropenem	0.5	<0.25	<0.25	<0.25	<0.25
Ertapenem	<0.5	<0.5	<0.5	<0.5	<0.5
Chloramphenicol	8	16	8	4	4

^aAn antibiotic susceptibility testing method for Helcococcus spp. has not been standardized by CLSI.

^bThe susceptibility to gentamicin was measured by Etest.

^cEtest results for azithromycin were not available, and susceptibility was based solely on the result with the Sensititre system.