TABLE 2.

Enumeration of viable cells (Log CFU/well ± standard error) of S. maltophilia (ATCC 13637) in single-species and dual-species biofilms mixed with (A) S. Typhimurium (ATCC 14028) and (B) P. fluorescens (self-isolated from basil).

A
Independent	S. maltophilia in		S. maltophilia in		S. Typhimurium in		S. Typhimurium in
trial number	single-species biofilms		dual-species biofilms		single-species biofilms		dual-species biofilms
	Control	UV treated	Control	UV treated	Control	UV treated	Control	UV treated
1	>8.2a	3.5 ± 0.2	>8.2a	<1.7b	>8.2a	<1.7b	>8.2a	<1.7b
2	7.8 ± 1.1	2.8 ± 0.4	9.0 ± 0.3	<1.7b	7.9 ± 0.1	<1.7b	8.1 ± 0.1	<1.7b
3	9.0 ± 0.2	<1.7b	9.6 ± 0.2	<1.7b	9.2 ± 0.1	<1.7b	9.0 ± 0.1	<1.7b
B
Independent	S. maltophilia in		S. maltophilia in		P. fluorescens in		P. fluorescens in
trial number	single-species biofilms		dual-species biofilms		single-species biofilms		dual-species biofilms
	Control	UV treated	Control	UV treated	Control	UV treated	Control	UV treated
1	8.4 ± 0.0	2.0c	8.4 ± 0.0	2.0c	8.2 ± 0.2	1.7c	8.3 ± 0.3	<1.7b
2	8.0 ± 0.2	1.7c	7.9 ± 0.1	2.6 ± 0.7	8.1 ± 0.1	1.7c	8.3 ± 0.1	3.0 ± 1.1d
3	8.6 ± 0.0	<1.7b	7.8 ± 0.2	3.6 ± 0.3	8.2 ± 0.1	<1.7b	8.3 ± 0.1	2.6 ± 0.7

Each data point represents the average of triplicates. ^aAll plates were too many to count, >300 colonies per plate (TNTC), corresponding to >8.2 log CFU/well; ^bbelow detection limit, <1 colony per plate, corresponding to <1.7 log CFU/well; ^cdata from one of the triplicates, the other two replicates were below the detection limit; ^ddata from the average of two out of the triplicates, the other replicate was below the detection limit.