Table 1. Minimum inhibitory concentration (MIC) of three optical forms of Tz with respect to different bacteria.

BACTERIA	MIC(µg/ml)
	Racemic	(+)	(−)
S. aureus NCTC 6571, V. cholerae 569B, V. cholerae 1023	25	25	25
S. aureus NCTC 8530, S. aureus ATCC 25923, S. dysenteriae 7 NCTC 519, Sh. boydii NCTC 254, V.cholerae ATCC 14033,ATCC 14035, V. cholerae DN7	50	100	50
Sh. flexneri 4a NCTC 24, Sh. sonnei NCTC 9774, V.cholerae 713, 820	100	100	100
S. aureus ML 16, ML 152, ML 329, ML 358, S. typhi NCTC 59, S. choleraesuis NCTC 36, 37, L. monocytogenes NCTC 7973,NCTC 10351, NCTC 11994	200	200	100
B. subtilis ATCC 6633, B. pumilus NCTC 8241, S. aureus ML 266, ML 358, ML 422, E. coli K12 Row, E. coli C600, S. berta NCTC 69,S. abony NCTC 6017	200	200	100
B. polymyxa NCTC 4747, B. licheniformis NCTC 10341, S. London NCTC 76, S. enterica serovar Typhimurium NCTC 11, NCTC 74	500	500	500
S. aureus ML 277, V. cholerae 137/62	1000	1000	1000
K. pneumoniae ATCC 10031, K. oxytoca ATCC 130988	2000	2000	2000
L. monocytogenes AMRI 3, A. boumannii KPC 470, 517, P. aeruginosa ATCC 27853, ATCC 25619, C/1/5, Kr/8/89, BVC 1,2,3,4,5, APC1.	>2000	>2000	>2000