TABLE 1.

Variant strains with reduced susceptibility to antibiotics obtained through repeated exposure to UV light and NTAP

Strain	Reference strain	CECT no.	Treatment	Antibiotic to which resistance was increased	MIC (μg/ml)
					Before adaptation	After adaptation
1-EVOL	S. Typhimurium	4594	UV light	Streptomycin	32	512
2-EVOL	S. Enteritidis	4300	UV light	Ciprofloxacin	0.25	1
3-EVOL	S. Typhimurium	722	NTAP	Ciprofloxacin	0.06	1
4-EVOL	S. Typhimurium	722	NTAP	Streptomycin	16	>2,048
5-EVOL	E. coli	99	NTAP	Tetracycline	8	>2,048
6-EVOL	E. coli	516	NTAP	Tetracycline	8	32
7-EVOL	L. monocytogenes	911	NTAP	Ciprofloxacin	1	8
8-EVOL	L. monocytogenes	940	UV light	Ciprofloxacin	2	4
9-EVOL	L. monocytogenes	911	UV light	Erythromycin	0.25	4
10-EVOL	L. monocytogenes	911	NTAP	Streptomycin	2	64
11-EVOL	L. monocytogenes	940	NTAP	Ciprofloxacin	2	4
12-EVOL	L. monocytogenes	911	UV light	Ciprofloxacin	1	4