Table 1.

Antibiotics screened^a

Antibiotic	Initial concn (μg/ml)	MIC (μg/ml)
		RMC26		CT31-7d		S. Typhimurium LT2
		MEP	MVA	MEP	MVA
Ampicillin	200	2.5	2.5	NA	NA	0.8–1.6
Carbenicillin	200	20	200	NA	NA	100
Streptomycin	200	50	100	100	100	12.5
Neomycin	200	NA	NA	NA	NA	25
Azithromycin	20	0.31–2.5	5–10	5	5	12.5
Clindamycin	200	0.16–0.63	2.5–5	NA	NA	2.5–5
Erythromycin	200	50–100	100–200	25–50	50	100–200
Clarithromycin	200	25–50	100	25–50	50	100–200
Lincomycin	200	12.5	NA	25–50	200	NA
Tetracycline	2	0.25–0.5	0.5–2	2	2	0.5
Doxycycline	20	0.08–0.6	0.63–1.25	1.25–2.5	1.25	0.5
Trimethoprim	20	2.5	20	1.25–2.5	1.25–2.5	0.5
Chloramphenicol	20	1.25	2.5	1.25–2.5	1.25–2.5	5
Ciprofloxacin	0.08	0.005–0.01	0.01–0.02	0.01	0.01	0.02
Levofloxacin	2	0.06–0.25	0.25–0.5	0.03	0.03	0.03
Nalidixic acid	20	1.25	2.5	2.5	2.5	1.25–5
Fosfomycin	100	(-)	(-)	1	1	(-)
Fosmidomycin	Var.	0.2	NA	0.01	NA	10

^aMICs were determined as the lowest concentration that inhibited bacterial growth > 90%, as determined by A₆₀₀ values relative to no-inhibitor control results. A minimum of 3 independent experiments, each run in duplicate, were used to determine MICs. Plates were incubated at 37°C and 80% humidity with shaking at 250 rpm. Plates were read after 18 h. NA = no activity; (-) = not screened.