(b)  

Controls and reference compounds	Gram-positive bacteria			Gram-negative bacteria			Fungus
	S. aureus	B. cereus	K. rhizophila	E. coli	P. aeruginosa	C. freundii	Aspergillus niger
DMSO	—	—	—	—	—	—	—
Streptomycin	14.08	15.67	12.20	14.44	13.54	Not available
Neomycin	18.14	18.52	18.57	16.58	21.87	18.91
Chloramphenicol	25.86	21.70	25.87	—	15.01	19.80
SBDTC	19.07	22.73	13.33	15.70	14.90	21.19	18.57
Amphotericin B							19.17

*Zones of inhibition of diameters 14 mm and above were considered to be significant, 9 mm–14 mm were considered moderate, and less than 9 mm were considered weak and insignificant. (—) refers to absence of measurable inhibitory action.