Table 3.

Inhibitory activities of five compounds against streptococci and S. aureus assayed in vitro.

Bacteria (No. of isolates)	MIC (μg/ml)
	5′-(Methylthio)-5′-deoxyadenosine	Octanal, 2-(2, 4-dinitrophenyl) hydrazone	Deoxyshikonin	Kavahin	Dodecylgallate
S. pyogenes	148	308	8.5	274	42
S. mitis	148	308	125	274	338
S. mutans	594	616	34	274	42
S. pseudopneumoniae	148	154	136	34	42
Methicillin resistant S. aureus (4)	–*	–	34–68	–	84.4–336

MICs to inhibit the growth of 10⁶CFU/ml bacteria were determined by the 2-fold agar dilution method.

^*No antibacterial effect when the compounds were tested in the concentrations used in this study.